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1
García-Rodríguez, José-Leonardo, Jesús Pérez-Moreno, Darcy Ríos-Leal, et al. "In vitro GROWTH OF ECTOMYCORRHIZAL FUNGI ASSOCIATED WITH Pinus radiata PLANTATIONS IN CHILE." Revista Fitotecnia Mexicana 40, no. 4 (2017): 415–23. http://dx.doi.org/10.35196/rfm.2017.4.415-423.
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A comparative study of in vitro growth of three species of ectomycorrhizal fungi (ECMF) (Rhizopogon luteolus, Suillus granulatus and Suillus luteus) was performed. Fungal material was collected in adult Pinus radiata plantations. Isolation and purification of the strains were performed on potato-dextrose-agar medium and the evaluation of the radial growth rate and the increase in mycelial biomass, under different culture conditions, was performed on the Modified Melin Norkrans growth medium. The effects of temperature (24, 28 and 32 ºC) and pH (4.8, 5.3, 5.8, 6.3 and 6.8) of the growth medium were tested for the three fungal species in two independent assays. The results indicate that the temperature had a significant effect on the radial growth rate (RG) and mycelial biomass increase (MB) in all of the evaluated fungal species. The highest RGR and MBI were recorded in R. luteolus, and the lowest values for these variables were registered in S. luteus. Rhizopogon luteolus had the highest sensitivity to pH changes. Meanwhile, there was no pattern in S. granulatus and S. luteus growth response under different pH conditions. When cultivated in vitro, the three studied species of ECMF presented adaptation, exponential, declining and stationary growth phases. The in vitro growth responses recorded in the present study showed the great potential of R. luteolus to be used in future programs using mycorrhizal inoculation in the production of Pinus radiata trees in nurseries in Chile.
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An, Qinghui, Jianghua Zheng, Jingyun Guan, et al. "Predicting the Effects of Future Climate Change on the Potential Distribution of Eolagurus luteus in Xinjiang." Sustainability 15, no. 10 (2023): 7916. http://dx.doi.org/10.3390/su15107916.
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Eolagurus luteus (yellow steppe lemming Eolagurus luteus Eversmann, 1840) is a keystone species in the desert steppe of northern Xinjiang, one of the regions most affected by global climate change. Their behavior of eating grassland vegetation and digging holes has resulted in the reduction of grassland vegetation and soil erosion in northern Xinjiang, which has seriously affected the ecological balance of the grassland in northern Xinjiang, and pathogens carried by E luteus pose a great threat to human health. Climate change exacerbates the uncertainty of the outbreak of E luteus. Predicting the suitable habitat area of this species under climate change scenarios will help farmers and herders deal with the potential threat of an E luteus outbreak. In this study, 117 actual occurrence points of E luteus were used, and 24 climate models, 6 soil factors and 3 topographic factors from the Coupled Model Intercomparison Project (CMIP6) were taken into account. Combining the MaxEnt model and the overlay analysis function of ArcGIS software, the potential geographic distribution of E luteus in 2030 and 2050 for the green development path (SSP126), the intermediate development path (SSP245), the regional competition path (SSP370), and the high development path (SSP585) was predicted. The change trend of the suitable area and distribution pattern of E luteus in Xinjiang under future climate conditions was analyzed, and the main environmental factors affecting the distribution of E luteus are discussed. The results show that the average area under curve (AUC) and true skill statistics (TSS) of the MaxEnt model are 0.993 and 0.8816, respectively, indicating that the model has a good prediction effect. The analysis of environmental factors showed that the main environmental factors affecting the potential geographical distribution of E luteus are average annual temperature, isotherm, average temperature in the wettest quarter, average temperature in the driest quarter, and precipitation variation coefficient. With the increase of radiation intensity and time, the suitable areas of E luteus will continue to decrease. Especially in the 2050s under the SSP585 scenario, the middle and high suitable areas will decrease by 2.58 × 104 km2 and 1.52 × 104 km2, respectively. Although the potential habitat area of E luteus is shrinking, the future threat of E luteus to grassland ecological security and human health should not be underestimated due to ecological adaptation of the community and the frequent occurrence of extreme weather. Therefore, studying changes in the potential geographic distribution of E luteus under climate change scenarios and developing appropriate monitoring programs are of great importance for grassland ecological security and human health. This study fills in the gaps in the study of the potential geographical distribution of E luteus and provides methodological and literature support for the study of the potential geographical distribution of other rodents.
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Dixon, Robert, and Paul Johnson. "Synthesis of Ectomycorrhizae on Northern Red Oak Seedlings in a Michigan Nursery." Arboriculture & Urban Forestry 18, no. 5 (1992): 266–72. http://dx.doi.org/10.48044/jauf.1992.052.
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Vegetative inoculum of the ectomycorrhizal fungus Suillus luteus was thoroughly mixed into fumigated nursery soil, and northern red oak seedlings of four families were evaluated one and two years after sowing for ectomycorrhizal development, growth, and nutrition. At the end of year 1, treated seedlings were successfully inoculated with S. luteus, but the percentage varied significantly with family. Suillus luteus persisted on lateral roots two years following sowing. Two of four seedling families inoculated with S. luteus were significantly larger in size than control plants. These results suggest that the fungal symbiont S. luteus can be successfully introduced into nurseries and that early ectomycorrhizal development improves the growth of northern red oak seedlings.
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Achmad, Ayu Ashari, M. Saifur Rohman, and Irfan D. Prijambada. "Biochemical Properties of Crude Extracellular Proteases from Chromohalobacter salexigens BKL5 and Micrococcus luteus 11A." Indonesian Journal of Biotechnology 21, no. 1 (2017): 56. http://dx.doi.org/10.22146/ijbiotech.26705.
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In this work, we have reported an enzymatic activity and biochemical properties of extracellular proteases from Chromohalobacter salexigens BKL5 and Micrococcus luteus 11A. C. salexigens BKL5 and M. luteus 11A were previously isolated from Bledug Kuwu mud volcano and dietary industry wastewater treatment, respectively. Both bacterial strains were able to produce extracellular proteases, when grown on minimal agar medium supplemented with 1% of skim milk. Proteolytic indexes of C. salexigens BKL5 and M. luteus 11A were 2.5±0.14 and 2.9±0.42, respectively. Both extracellular proteases exhibited optimum enzymatic activity at pH 7, with specific activity of C. salexigens BKL5 was 13.3% higher than that of M. luteus 11A. Optimum temperature for enzymatic activity of both proteases was 45°C. Metal cofactor preferences assay showed that extracellular protease from C. salexigens BKL5 preferred Zn2+, meanwhile extracellular protease from M. luteus 11A mainly preferred Ca2+ ion. Metal cofactor preferences assay also suggested that crude extracellular protease from C. salexigens BKL5 was categorized as metalloprotease, meanwhile crude extracellular protease of M. luteus 11A was common neutral protease. The enzymatic stability assay against various salt concentrations showed that crude extracellular protease from C. salexigens BKL5 was more stable than that of M. luteus 11A.
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Jain, Rohit, Abigail L. Voss, John R. Tagg, and John D. F. Hale. "Evaluation of the Preliminary Safety, Tolerability and Colonisation Efficacy of Topical Probiotic Formulations Containing Micrococcus luteus Q24 in Healthy Human Adults." Cosmetics 9, no. 6 (2022): 121. http://dx.doi.org/10.3390/cosmetics9060121.
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Probiotics developed for topical applications in humans have the potential to beneficially modulate microbial imbalances on the skin surface and thereby improve skin health. This study was conducted to determine whether topical formulations containing the human skin commensal Micrococcus luteus strain Q24 (BLIS Q24) are safe, tolerable and efficacious when used by healthy human subjects. M. luteus Q24 was assessed in vitro for haemolytic activity and its antibiotic susceptibility profile. Formulations of strain Q24 were evaluated for the preliminary safety and tolerability in healthy human participants. Forty-seven adults were randomly assigned to four single-site, single-blind randomised placebo or baseline controlled or active-controlled trials. Skin swab samples were collected for differential viable counts to monitor levels of probiotic colonisation. M. luteus Q24 was found to be non-haemolytic and susceptible to commonly used antibiotics. The M. luteus Q24 formulations were safe and tolerable and >90% of the participants reported improvements from baseline in the appearance (e.g., radiance and hydration) of their treated skin. Additionally, participants observed a reduction in pore size, skin clarity and enhanced skin softness. No adverse effects were reported. A dose-related significant increase was observed in the levels of M. luteus Q24 isolated from skin swabs of the probiotic-treated subjects. Placebo-controlled trials in human subjects involving the topical application of different doses of M. luteus Q24 formulations were supportive of the safety, tolerability and efficacy of probiotic M. luteus Q24. Self-reported skin health assessments by the subjects indicated that M. luteus Q24 has good potential as a probiotic for improving skin health quality.
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Papazov, Penko, and Panteley Denev. "DETERMINATION PHOSPHOLIPIDS OF WILD EDIBLE MUSHROOMS (SUILLUS LUTEUS)." Applied Researches in Technics, Technologies and Education 6, no. 4 (2018): 311–20. http://dx.doi.org/10.15547/artte.2018.04.005.
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Mushroom samples were collected in 2017 and 2018 from the Batak mountain by the authors themselves. The aim of this study was to determine phospholipids composition of species wild edible mushrooms (Suillus luteus) grown in the Batak mountain, Bulgaria. Phosphatidic acids were the main components in lipids from Suillus luteus (34.2 %). The content of the other phospholipids in the oils from Suillus luteus was from 8.4 to 19.6%. Phosphatidylcholine was identified in Suillus luteus (19.6 %). Based on the results, can be concluded that the examined species of mushrooms is a potential source of phospholipids and can be used as a functional food or as food additives in many products.
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Chemerovska, I. O. "Research on the microflora of cattle and deer during the development of wounds, abscesses and endometritis." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 27, no. 117 (2025): 158–65. https://doi.org/10.32718/nvlvet11722.
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To date, pathogenic and opportunistic microorganisms are common. From the biological material collected from the site of abscess development, the predominant microflora were in cattle: Micrococcus luteus, Esherichia coli, Enterococcus faecalis, Staph. epidermidis, Bac. subtilis, Staph. intermedius, Staph. aureus, Streptococcus spp, Staph. haemolyticus, Staph. eguorum, Staph. cohnii, Staph. felis, Corinebacterium xerosis, Kocuria rhizophia, Enterobacter spp: Micrococcus luteus, Staph. epidermidis, Bac. megaterium, Staphylococcus spp. Streptococcus spp. Pseudomonas aeruginosa, Enterococcus faecalis, Esherichia coli. From the biological material collected from the site of wound development, the predominant microflora were in cattle: Bac. megaterium, Acinetobacter spp. 17.65 %, Enterococcus faecalis, Pseudomonas spp: Staph. epidermidis, Staphylococcus spp., Micrococcus luteus, Streptococcus spp., Staph. aureus, Bac. subtilis, Proteus spp., Enterococcus faecalis, Esherichia coli, Pseudomonas aeruginosa, Staph. simulans, Staph. intermedius, Staph. sciuri, Acinetobacter spp., Pseudomonas spp. The predominant microflora of the biological material collected during the development of endometritis were in cattle: Micrococcus luteus, Enterococcus faecalis, Staph. aureus, Staph. chromogenes, Pseudomonas aeruginosa, Staph. haemolyticus, Staph. gallinarium, Staph. simulans, Staph. eguorum, Streptococcus spp. From the results obtained, it can be concluded that in cattle we most often identified Micrococcus luteus – 15.39 % and Enterococcus faecalis – 13.46 % in the study of endometritis, Micrococcus luteus – 23.53 %, Staphylococcus spp. – 23.53 %, but for the study of abscesses of Micrococcus luteus – 20 %, Escherichia coli – 13.33 % of deer for the study of wounds of Escherichia coli – 21.05 %, Staph. aureus – 15.79 % of wounds, and abscesses of Staph. aureus – 31.81 %, Escherichia coli – 27.27 %.
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Pederson, Addie, R. Boone Coleman, and Mary Irving. "An unknown source of Micrococcus luteus bacteremia." Southwest Respiratory and Critical Care Chronicles 11, no. 48 (2023): 43–45. http://dx.doi.org/10.12746/swrccc.v11i48.1187.
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Micrococcus luteus is a common organism in the human skin flora. It is an uncommon cause of pathogenic bloodstream infections, which occur mostly in immunocompromised patients. We report the clinical course of an 82-year-old man who underwent complex management of multiple diverticular abscesses and had three serial positive blood cultures for M. luteus. Despite treatment with vancomycin, the patient ultimately died due to septicemia secondary to mixed gastrointestinal flora and M. luteus. A source this infection was never definitely identified.
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Usó, Jordi, María Gil, Bárbara Gomila, and Mª Dolores Tirado. "Endocarditis por Micrococcus luteus." Enfermedades Infecciosas y Microbiología Clínica 21, no. 2 (2003): 117. http://dx.doi.org/10.1157/13042871.
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Usó, Jordi, María Gil, Bárbara Gomilab, and M. Dolores Tiradob. "Endocarditis por Micrococcus luteus." Enfermedades Infecciosas y Microbiología Clínica 21, no. 2 (2003): 117. http://dx.doi.org/10.1016/s0213-005x(03)72895-x.
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Amaru Chambilla, Glicerio Reyes, and Ernesto Yujra Flores. "Efecto de la microalga Chlorella vulgaris en el manejo de larvas y alevinos de Orestias luteus nativa del lago Titicaca, Perú." Revista de Investigaciones Altoandinas - Journal of High Andean Research 25, no. 2 (2023): 83–89. http://dx.doi.org/10.18271/ria.2023.441.
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El ensayo se realizó en el mes de marzo del 2021 en el Laboratorio Continental de Puno – IMARPE, con la finalidad de determinar el efecto del uso de la microalga Chlorella vulgaris como alimento al inicio de la ontogenia de Orestias luteus, se realizó ensayo con 1600 larvas mantenidas en dos acuarios de 45 L. Un acuario con Chlorella vulgaris (agua verde), y el otro acuario sin Chlorella vulgaris (agua clara). Se reflejan que durante los primeros 7 días las larvas alimentadas y mantenidas con microalgas presentaron mayor supervivencia debido a que el alto nivel nutricional que presenta la microalga como el ácido docosahexaenoico (DHA) aparentemente influyó en el desarrollo de las larvas de Orestias luteos. Asimismo al ser añadidas directamente a los acuarios, las microalgas ejercieron una influencia positiva en el estado fisiológico de larvas de Orestias luteus que se traduce en la obtención de alevines de elevada calidad.Se concluye que, el alimento vivo como organismos planctónicos constituyen la base de alimentación en el estadío larvario de Carachi amarillo y la obtención de alta supervivencia de semillas permitiendo mejor crecimiento y mayor supervivencia.
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Torasso Kasem, Enzo Joaquin, Angel Angelov, Elisa Werner, Antoni Lichev, Sonja Vanderhaeghen, and Wolfgang Liebl. "Identification of New Chromosomal Loci Involved in com Genes Expression and Natural Transformation in the Actinobacterial Model Organism Micrococcus luteus." Genes 12, no. 9 (2021): 1307. http://dx.doi.org/10.3390/genes12091307.
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Historically, Micrococcus luteus was one of the first organisms used to study natural transformation, one of the main routes of horizontal gene transfer among prokaryotes. However, little is known about the molecular basis of competence development in M. luteus or any other representative of the phylum of high-GC Gram-positive bacteria (Actinobacteria), while this means of genetic exchange has been studied in great detail in Gram-negative and low-GC Gram-positive bacteria (Firmicutes). In order to identify new genetic elements involved in regulation of the comEA-comEC competence operon in M. luteus, we conducted random chemical mutagenesis of a reporter strain expressing lacZ under the control of the comEA-comEC promoter, followed by the screening of dysregulated mutants. Mutants with (i) upregulated com promoter under competence-repressing conditions and (ii) mutants with a repressed com promoter under competence-inducing conditions were isolated. After genotype and phenotype screening, the genomes of several mutant strains were sequenced. A selection of putative com-influencing mutations was reinserted into the genome of the M. luteus reporter strain as markerless single-nucleotide mutations to confirm their effect on com gene expression. This strategy revealed mutations affecting com gene expression at genetic loci different from previously known genes involved in natural transformation. Several of these mutations decreased transformation frequencies by several orders of magnitude, thus indicating significant roles in competence development or DNA acquisition in M. luteus. Among the identified loci, there was a new locus containing genes with similarity to genes of the tad clusters of M. luteus and other bacteria.
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Zouaoui, Jihen, Pierre Poteaux, Audrey Beaussart, Nicolas Lesniewska, David Duval, and Jérôme F. L. Duval. "Probing Bacterial Interactions with the Schistosoma mansoni-Killing Toxin Biomphalysin via Atomic Force Microscopy and Single Molecule Force Spectroscopy." Toxins 17, no. 6 (2025): 269. https://doi.org/10.3390/toxins17060269.
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Recent work has identified biomphalysin (BM) protein from the snail Biomphalaria glabrata as a cytolytic toxin against the Schistosoma mansoni parasite. Ex vivo interactome studies further evidenced BM’s ability to bind bacterial outer membrane proteins, but its specific antibacterial mechanisms and selectivity remain unclear. Accordingly, this study aims to elucidate the interaction between BM and two model bacteria with distinct cell surface architectures: Escherichia coli (Gram−) and Micrococcus luteus (Gram+). Employing a multiscale approach, we used in vivo single-molecule force spectroscopy (SMFS) to probe molecular interactions at the single cell level. Combined with cell aggregation assays, immunoblotting and Atomic Force Microscopy (AFM) imaging, SMFS results evidenced a selective interaction of BM from snail plasma with M. luteus but not E. coli. Exposure of M. luteus to BM compromised cell surface integrity and induced cell aggregation. These effects correlated with a patch-like distribution of BM on M. luteus reminiscent of pore-forming toxins, as revealed by the anti-BM antibody-functionalized AFM tip. Overall, this work highlights the utility of SMFS in dissecting host–pathogen molecular dialogs. It reveals BM’s selective action against M. luteus, potentially via surface clustering, and it shows spatially heterogeneous responses to the toxin within and between individual cells.
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Rao, C., G. Sharma, and A. Shukla. "Influence of organic amendments on the development of ectomycorrhizae and their efficiency in P uptake and seedlings growth of Pinus kesiya." Indian Journal of Forestry 22, no. 1 (1999): 7–13. https://doi.org/10.54207/bsmps1000-1999-1lm846.
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Mycorrhizal infection with seedlings was maximum by Suillus luteus fungus in grass litter amended soil and minimum by Pisolithus tinctorius in fresh pine needle amended soil. Production of mycorrhizae was maximum by S. luteus fungus in grass litter amended soil and minimum in those seedling inoculated with P. tinctorius grown in unamended soil. Root phosphatase activity was more with mycobionts inoculatese activity of root was observed in seedlings inoculated with S. luteus and grown in grass litter amended soil. In general nutrient concentration recorded higher in the seedlings inoculated with the mycobionts grown in amended soil than uninoculated one.
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Young, Michael, Vladislav Artsatbanov, Harry R. Beller, et al. "Genome Sequence of the Fleming Strain of Micrococcus luteus, a Simple Free-Living Actinobacterium." Journal of Bacteriology 192, no. 3 (2009): 841–60. http://dx.doi.org/10.1128/jb.01254-09.
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ABSTRACT Micrococcus luteus (NCTC2665, “Fleming strain”) has one of the smallest genomes of free-living actinobacteria sequenced to date, comprising a single circular chromosome of 2,501,097 bp (G+C content, 73%) predicted to encode 2,403 proteins. The genome shows extensive synteny with that of the closely related organism, Kocuria rhizophila, from which it was taxonomically separated relatively recently. Despite its small size, the genome harbors 73 insertion sequence (IS) elements, almost all of which are closely related to elements found in other actinobacteria. An IS element is inserted into the rrs gene of one of only two rrn operons found in M. luteus. The genome encodes only four sigma factors and 14 response regulators, a finding indicative of adaptation to a rather strict ecological niche (mammalian skin). The high sensitivity of M. luteus to β-lactam antibiotics may result from the presence of a reduced set of penicillin-binding proteins and the absence of a wblC gene, which plays an important role in the antibiotic resistance in other actinobacteria. Consistent with the restricted range of compounds it can use as a sole source of carbon for energy and growth, M. luteus has a minimal complement of genes concerned with carbohydrate transport and metabolism and its inability to utilize glucose as a sole carbon source may be due to the apparent absence of a gene encoding glucokinase. Uniquely among characterized bacteria, M. luteus appears to be able to metabolize glycogen only via trehalose and to make trehalose only via glycogen. It has very few genes associated with secondary metabolism. In contrast to most other actinobacteria, M. luteus encodes only one resuscitation-promoting factor (Rpf) required for emergence from dormancy, and its complement of other dormancy-related proteins is also much reduced. M. luteus is capable of long-chain alkene biosynthesis, which is of interest for advanced biofuel production; a three-gene cluster essential for this metabolism has been identified in the genome.
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Aral, Faruk, Zafer Doğu, and Erdinç Şahinöz. "Atatürk Baraj Gölü’nde Yaşayan Carasobarbus luteus (H., 1843) ve Carassius carassius (L., 1758) Balıklarının Spermatolojik Özelliklerinin Karşılaştırılması." Turkish Journal of Agriculture - Food Science and Technology 2, no. 4 (2014): 185. http://dx.doi.org/10.24925/turjaf.v2i4.185-189.95.
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The aim of this study was to determine the main spermatological properties in Carasobarbus luteus (H., 1843) and Carassius carassius (L., 1758) in Atatürk Dam Lake. Sperm was collected by abdominal massage from thirty C. luteus and twenty C. carassius. Milt volume (ml), spermatozoa motility (%), motility duration (s), spermatozoa concentration (x109/ml) and pH in C. luteus and C. carassius were 0.72±0.08 ml and 1.03±0.20 ml, %57.67±3.67 and % 81.00±1.43, 190.30±11.25 s and 107.30±12.03 s, 13.15±1.33 and 10.53±1.28x109/ml, 8.13±0.11 and 7.60±0.04, respectively. The spermatozoa motility, motility duration, spermatozoa concentration and pH was found significant compared with fish species group.
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NEMÉSIO, ANDRÉ, and CLAUS RASMUSSEN. "The rediscovery of Buffon’s “Guarouba” or “Perriche jaune”: two senior synonyms of Aratinga pintoi Silveira, Lima & Höfling, 2005 (Aves: Psittaciformes)." Zootaxa 2013, no. 1 (2009): 1–16. http://dx.doi.org/10.11646/zootaxa.2013.1.1.
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Buffon’s “Guarouba” or “Perriche jaune” is illustrated in his magnificent “Histoire Naturelle des Oiseaux” and was interpreted by Buffon as the same bird described by Marcgrave in the 17th century as “Guarouba” or “Quijubatui”. Nevertheless, the bird described by Marcgrave corresponds to the species formally described by Gmelin (1789) as Psittacus guarouba and currently known as Guarouba guarouba. Buffon’s bird was named Psittacus luteus Boddaert, 1783, became the type-species of the genus Aratinga, and has long been considered a junior synonym of Psittacus solstitialis Linnaeus, 1758 (now Aratinga solstitialis). However, Buffon’s illustration, upon which the description of P. luteus Boddaert, 1783 was based, is not an Aratinga solstitialis, but a similar species recently redescribed and named Aratinga pintoi Silveira, Lima & Höfling, 2005. An earlier, although long overlooked, older synonym of P. luteus, is Psittacus maculatus Statius Müller, 1776, also based on Buffon’s plate, and which turns out to be the valid nomen of this species. Thus, Aratinga maculata (Statius Müller, 1776) comb. nov. is the senior synonym of both Psittacus luteus Boddaert, 1783 syn. nov. and Aratinga pintoi Silveira, Lima & Höfling, 2005 syn. nov. In order to establish nomenclatural stability, the holotype of Aratinga pintoi is here designated as neotype of both Psittacus maculatus and Psittacus luteus, establishing an objective synonymy among the three nomina.
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Mamani-Ochochoque, Juan, Sabino Atencio-Limachi, César Salvador Medrano-Moreno, Nelly Hancco-Aguilar, Lenin David Paredes-Mamani, and George Argota-Pérez. "ALIMENTACIÓN EXÓGENA LARVARIA Y SUPERVIVENCIA DE ORESTIAS LUTEUS VALENCIENNES, 1846 EN CONDICIONES CONTROLADAS." Paideia XXI 12, no. 2 (2022): 207–13. http://dx.doi.org/10.31381/paideiaxxi.v12i2.5011.
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El objetivo del estudio fue describir la alimentación exógena larvaria y supervivencia de Orestias luteus (Valenciennes, 1846) en condiciones controladas. El estudio se realizó en el laboratorio de cultivo prototipo de la Fundación Titicaca Perú (FUNTI-PERU) de la ciudad de Puno (Perú). Se utilizó como material biológico, 896 unidades de larvas de O. luteus donde se distribuyó en tres tratamientos y con tres repeticiones: 1ro) T1 = 299 unidades, 2do) T2 = 300 unidades y 3ro) T3 = 297 unidades. Se consideró, tres tratamientos con réplicas: 1ro) larvas alimentadas con nauplios de Artemia salina recién eclosionados / Artemia, Marca Mackay Marine, 2do) Artemia salina (Linnaeus, 1758) + Ceriodaphnia dubia (Richard, 1894), y 3ro) Ceriodaphnia dubia + Daphnia pulex (Linnaeus, 1758). Al compararse la sobrevivencia en O. luteus según, los tratamientos experimentales de la alimentación exógena con alimentos vivos, existió diferencias estadísticamente significativas. El tratamiento experimental con A. salina + C. salina fue del 100% y arrojó, diferencias comparadas con la alimentación entre A. salina (97,65) y C. salina + D. pulex (98,66). Las larvas de O. luteus se adaptaron a la alimentación con organismos vivos donde la combinación entre A. salina + C. salina fue la ideal para la sobrevivencia. Se concluye, que la alimentación con los organismos vivos: A. salina, C. salina y D. pulex permiten la supervivencia de O. luteus en condiciones controladas donde el tratamiento combinado con A. salina y C. salina es el más favorable.
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Fujiko, Muflihah, Khaliza Maulidea, Vriezka Mierza, and Sumardi Sumardi. "PENGHAMBATAN PERTUMBUHAN BAKTERI Dermacoccus nishinomiyaensis DAN Micrococcus luteus DENGAN EKSTRAK BIJI SALAK (Salacca zalacca (Geartn.) Voss)." Jambura Journal of Health Sciences and Research 5, no. 2 (2023): 533–40. http://dx.doi.org/10.35971/jjhsr.v5i2.18361.
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Salak merupakan kelompok tumbuhan angiospermae yang tumbuh dan tersebar di Indonesia. Biji salak diketahui memiliki kandungan senyawa tanin, kuinon, monoterpen, seskuiterpen, alkaloid dan polifenol yang berpotensi sebagai antioksidan dan antibakteri. Tumbuhan yang memiliki aktivitas sebagai antibakteri saat ini banyak diteliti dan dikembangkan menjadi suatu produk atau diperlukan untuk pengobatan terbaru karena terjadinya resistensi terhadap antibiotik. Bakteri patogen merupakan salah satu bakteri yang resisten terhadap antibiotik seperti bakteri Gram + yang dapat menyebabkan infeksi serius. Bakteri Micrococcus luteus dan Dermacoccus nishinomiyaensis merupakan bakteri Gram + yang dapat berkembang biak pada kulit, mukosa, jaringan pernafasan dan jaringan otak. Kebaruan penelitian ini karena meneliti tentang hambatan prtumbuhan bakteri Dermacoccus nishinomiyaensis dan Micrococcus luteus dengan ekstrak biji salak (Salacca zalacca (Geartn.) Voss) Adanya aktivitas antibakteri dari biji salak terhadap pertumbuhan bakteri Micrococcus luteus dan Dermacoccus nishinomiyaensis merupakan tujuan dari penelitian ini. Metode penelitian yang dilakukan meliputi identifikasi tumbuhan, ekstraksi sampel secara maserasi, analisis golongan senyawa kimia secara Kromatografi Lapis Tipis (KLT), dan pengujian antibakteri dengan metode difusi sumuran. Hasil analisis golongan senyawa kimia dengan metode KLT menunjukkan ekstrak etanol biji salak mengandung senyawa polifenol, alkaloid, triterpenoid dan steroid. Hasil uji aktivitas antibakteri memperlihatkan adanya daerah hambat terhadap pertumbuhan bakteri Micrococcus luteus dan Dermacoccus nishinomiyaensis pada konsentrasi 100 mg/ml. Kesimpulan ekstrak etanol dari biji salak memiliki aktivitas antibakteri yang dihubungkan dengan kandungan senyawa kimianya.Kata kunci: Antibakteri, Biji Salak, Dermacoccus nishinomiyaensis, Micrococcus luteus, Salacca zalacca (Geartn.)
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Bolland, M. D. A., M. W. Sweetingham, and R. J. Jarvis. "Effect of applied phosphorus on the growth of Lupinus luteus, L. angustifolius and L. albus in acidic soils in the south-west of Western Australia." Australian Journal of Experimental Agriculture 40, no. 1 (2000): 79. http://dx.doi.org/10.1071/ea99065.
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Phosphorus is the major nutrient element deficiency of grain legumes in the south-west of Western Australia. Lupinus angustifolius is the major grain legume grown on the acidic soils in Western Australia. However, L. luteus and L. albus are being researched as possible alternatives because of tolerance to diseases and specific soil type adaptation. The fertiliser phosphorus requirements of L. luteus and L. albus in acidic soils of Western Australia are not well known. By contrast, there is much information on the phosphorus requirements of L. angustifolius in these soils where placement of fertiliser phosphorus has been found to be important. Three field experiments were undertaken on different acidic soils in Western Australia (sand, sandy loam, and loamy sand) to compare how L. luteus cv. Teo and L. angustifolius cv. Merrit use fertiliser phosphorus, applied by different methods as superphosphate. Lupinus albus cv. Kiev Mutant, which is not adapted to the sandier soils, was included at the loamy sand site. In 2 experiments on the loamy soils, the phosphorus was either placed with the seed (drilled) or 8 cm below the seed while sowing seed at 5 cm (banded). In the experiment on sand, the phosphorus was either spread over the soil surface immediately in front of the seeding tines (topdressed) or banded below the seed. Compared with L. angustifolius: (i) for the 2 loamy soils, L. luteus used phosphorus more effectively for producing dried shoots, but was less effective at using phosphorus for producing seed (grain); (ii) for the loamy sand, L. albus was less effective at using the phosphorus for producing dried shoots and grain, except it was about equally effective for producing grain when the phosphorus was banded below the seed. For the sandy soil, L. luteus produced no grain yield response whereas L. angustifolius showed an about 20% yield response to the added phosphorus, and both methods of application were about equally effective. Phosphorus banded below the seed was more effective than phosphorus drilled with the seed for producing dried shoots and grain of L. albus on the loamy sand and for grain only of L. luteus on the sandy loam. Both methods of phosphorus application were about equally effective for producing dried shoots and grain of L. angustifolius and grain of L. luteus on the loamy sand. Fertiliser drilled with the seed was more effective than banded fertiliser for producing dried shoots and grain of L. angustifolius on the sandy loam and dried shoots of L. luteus on the loamy sand and sandy loam. The concentration of phosphorus in grain of L. luteus was consistently about double that found in grain of L. angustifolius. The concentration of manganese in dried shoots of L. albus was 3–5 times higher than in the other 2 species.
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& et al., Mansoor. "DIAGNOSIS OF MYXOBOLUS BRAMAE (MYXOSPOREA: MYXOBOLIDAE) IN THE KIDNEYS TISSUE OF CARASOBARBUS LUTEUS AND HISTOPATHOLOGICAL CHANGES ASSOCIATED WITH INFECTION." IRAQI JOURNAL OF AGRICULTURAL SCIENCES 51, no. 3 (2020): 874–84. http://dx.doi.org/10.36103/ijas.v51i3.1042.
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This study was conducted during the period from March till the end of October 2018, to study the histopathological changes of Myxobolus bramae in kidney tissue of Carasobarbus luteus caught from Tigris River passing through Baghdad city. During the period of this study, a total of 60 fishes belonging to Carasobarbus luteus species from the family Cyprinidae were collected. The prevalence of infection with these protozoa was determinate (5.00%). Histopathological study due to M. bramae in the kidney tissue of C. luteus was done by using three types of stain: Hemotoxylin and eosin, giemsa and acid fast stain to observe plasmodia cyst and structures of spores. These changes characterized by tubular degeneration, necrosis, hyalinization of glomerular tuft, mild distension of Bowman᾿s space with a reduction in haemopoitic tissue together with inflammatory response, and accumulation of melanomacrophages at the site of infection. The results of this study revealed that Carasobarbus luteus from Tigris River at Baghdad city, it infected with Myxobolus bramae and this parasite cause severe histopathological changes in the infected kidneys tissue.
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UBERO-PASCAL, NICOLÁS, and M. ANGELS PUIG. "Egg morphology update based on new chorionic data of Potamanthus luteus (Linnaeus), Ephemera danica Müller and Oligoneuriella rhenana (Imhoff) (Insecta, Ephemeroptera) obtained by scanning electron microscopy." Zootaxa 1465, no. 1 (2007): 15–29. http://dx.doi.org/10.11646/zootaxa.1465.1.2.
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The chorionic patterns of Ephemeroptera eggs are very diverse and these have often been used for taxonomic and systematic purposes. In a great number of species, including Potamanthus luteus, Ephemera danica and Oligoneuriella rhenana, these egg features have been studied using light microscopy. However, current trends in egg morphology studies use scanning electron microscopy (SEM), so that the eggs of these species need to be re-described in order to establish morphological comparisons. The general chorionic features which have already been described in these three species are confirmed in our SEM study, although a more detailed description of both the architecture and arrangement of these can now be offered. In addition, this study has allowed us to note new morphological data, such as the chorionic reticulation in P. luteus and the complex extrachorion-adhesive layer in E. danica; classification of the lateral attachment structure in P. luteus and O. rhenana has been changed; and the variability of the polar cap observed in P. luteus underlines the care that must to be taken when selecting chorionic structures for taxonomic purposes.
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Seifert, Bernhard, Sandor Csösz, and Andreas Schulz. "NC-Clustering demonstrates heterospecificity of the cryptic ant species Temnothorax luteus (FOREL, 1874) and T. racovitzai (BONDROIT, 1918) (Hymenoptera: Formicidae)." Beiträge zur Entomologie = Contributions to Entomology 64, no. 1 (2014): 47–57. http://dx.doi.org/10.21248/contrib.entomol.64.1.47-57.
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Es wird gezeigt, dass die westmediterranen kryptischen Ameisenarten Temnothorax luteus (Forel, 1874) und T. racovitzai (Bondroit, 1918) mittels explorativer und hypothesengetriebener Analysen komplexer morphologischer Datensätze eindeutig unterscheidbar sind. Die Untersuchung konzentrierte sich auf das sympatrische Areal beider Arten. An 178 Arbeiterinnen aus 64 Nestproben wurden 18 morphologische Merkmale erfasst. Nach Reduktion auf die sieben meistseparierenden Merkmale ergab sich eine 100 %ige Übereinstimmung der Klassifizierungen durch hierarchische NC-Ward-, nicht hierarchische NC-K-Means- und NC-NMDS-K-Means Clusteranalyse sowie durch eine lineare Diskriminanzanalyse. Die Typenserien von T. massiliensis (Bondroit, 1918) und T. racovitzai (Bondroit, 1918) wurden mit einer a posteriori Wahrscheinlichkeit von p = 1.0000 bzw. p = 0.9992 dem gleichen Cluster zugeordnet. Die Typenserien von T. tristis (Bondroit, 1918) und T. luteus wurden beide mit p = 0.9999 einem zweiten, deutlich vom ersteren separierten Cluster zugeordnet. Daraus ergibt sich, dass T. tristis ein jüngeres Synonym von T. luteus und T. massiliensis ein jüngeres Synonym von T. racovitzai ist. Der Klassifikationsfehler auf der Ebene der Individuen betrug 1.7 % an 178 Arbeiterinnen. Trotz einer breiten Überlappung der Verbreitungsgebiete gibt es keine Hinweise auf phänotypisch gemischte Nester, was die Hypothese widerlegt, dass T. luteus and T. racovitzai einen intraspezifischen Polymorphismus repräsentieren könnten. Es wurden signifikante interspezifische Unterschiede in der geographischen Verbreitung und der thermischen Nischenkomponente gezeigt. Die mittlere Lufttemperatur von Mai bis August von 24 Fundorten von T. luteus war im Mittel um 3.77°C kälter als die von 21 Fundorten von T. racovitzai (p
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Ilori, Matthew O. N., and Dan-Israel Amund. "Degradation of Anthracene by Bacteria Isolated from Oil Polluted Tropical Soils." Zeitschrift für Naturforschung C 55, no. 11-12 (2000): 890–97. http://dx.doi.org/10.1515/znc-2000-11-1208.
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Four bacteria, identified as Pseudomonas aeruginosa, Alcaligenes eutrophus, Bacillus subtilis and Micrococcus'luteus were isolated from crude oil polluted soils using anthracene as the sole carbon and energy source. All the organisms utilized n-hexadecane, n-tetradecane, diesel oil, engine oil and naphthalene as sole carbon sources. None could utilize hexane, cycloheptane, xylene, benzene, toluene, phenol, fluoranthene,and kerosene as carbon sources. Highest cell density obtained with 0.1% (w/v) anthracene were 4.5 × 107 (cfu/ml), 8.6 × 106 (cfu/ml), 5.4 × 106 and 2.4 × 106 (cfu/ml) respectively, for P. aeruginosa, A. eutrophus, B. subtilis and M. luteus after 30 days incubation. Growth of the organism s on a Nigerian crude oil resulted in a residual oil concentration of 22.2% , 33.3% , 39.3% ,44% and 91.7% respectively, for P. aeruginosa, A. eutrophus, B. subtilis, M. luteus and the noninoculated control on the 14 th day. Ring fission enzymes of the meta pathway were detected in induced cells of P. aeruginosa and A. eutrophus while ortho pathway enzymes were detected in B. subtilis and M. luteus. P. aeruginosa and A. eutrophus had specific catechol-2,3-dioxygenase activities of 3.8 ± 0.183 and 0.64 ± 0.032 μmol / min × mg protein respectively while catechol-1,2-dioxygenase activities of 1.95 ± 0.029 and 1.89 ± 0.026 μmol / min x mg protein were detected in B. subtilis and M. luteus respectively. This work , highlights the capability of these unreported tropical strains of A. eutrophus, B. subtilis and M. luteus as anthracene degraders.
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Hedger, John. "Suillus luteus on the Equator." Bulletin of the British Mycological Society 20, no. 1 (1986): 53–54. http://dx.doi.org/10.1016/s0007-1528(86)80015-3.
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Fosse, T., B. Toga, Y. Peloux, C. Granthil, J. Bertrando, and M. Sethian. "Meningitis due to Micrococcus luteus." Infection 13, no. 6 (1985): 280–81. http://dx.doi.org/10.1007/bf01645439.
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Greenblatt, C. L., J. Baum, B. Y. Klein, S. Nachshon, V. Koltunov, and R. J. Cano. "Micrococcus luteus - Survival in Amber." Microbial Ecology 48, no. 1 (2004): 120–27. http://dx.doi.org/10.1007/s00248-003-2016-5.
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Li, H., S. J. Wylie, and M. G. K. Jones. "Transgenic yellow lupin ( Lupinus luteus )." Plant Cell Reports 19, no. 6 (2000): 634–37. http://dx.doi.org/10.1007/s002990050785.
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Ludira Sari, Akhmad Taufiq Mukti, Rahayu Kusdarwati,. "Daya Antibakteri Ekstrak Buah Adas (Foeniculum vulgare) Terhadap Bakteri Micrococcus luteus Secara In Vitro [Antibacterial Effort Of Adas Fruit (Foeniculum vulgare) Extract On Micrococcus luteus Bacterial By In Vitro]." Jurnal Ilmiah Perikanan dan Kelautan 2, no. 1 (2019): 31. http://dx.doi.org/10.20473/jipk.v2i1.11674.
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AbstractOne of the disease attack of freshwater fish is micrococcus which caused by Micrococcus luteus bacterial. Antibiotic was caused of residual, polluted and expensive. Therefore, it was looked for alternative using natural and safety materials. The study used the fruit extract of adas as antibacterial to Micrococcus luteus. This experiment purpose to investigate of Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of fruit extract of adas to Micrococcus luteus. The study was done on 15 June-05 July 2009 on Development Center of Quarantine Fish Juanda; Institute Tropical Disease, Airlangga University Surabaya; and Department of Faculty Pharmacology of Medicine, Airlangga University Surabaya. The experiment was used experimental method which completely randomized design with twelve treatments and three replicates. The parameters observed were Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC). The data analyzed used F test and was continued with Duncan's Multiple Range Test. The result indicated that fruit extract of adas had antibactericidal to Micrococcus luteus. According to inhibitory test growth of bacterial had inhibitory capacity (MIC) at concentration 1,56% (0,018 g/ml). Therefore, the bactericidal capacity (MBC) was at concentration 3,13% (0,036 g/ml).
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Adriaensen, K., T. Vrålstad, J. P. Noben, J. Vangronsveld, and J. V. Colpaert. "Copper-Adapted Suillus luteus, a Symbiotic Solution for Pines Colonizing Cu Mine Spoils." Applied and Environmental Microbiology 71, no. 11 (2005): 7279–84. http://dx.doi.org/10.1128/aem.71.11.7279-7284.2005.
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ABSTRACT Natural populations thriving in heavy-metal-contaminated ecosystems are often subjected to selective pressures for increased resistance to toxic metals. In the present study we describe a population of the ectomycorrhizal fungus Suillus luteus that colonized a toxic Cu mine spoil in Norway. We hypothesized that this population had developed adaptive Cu tolerance and was able to protect pine trees against Cu toxicity. We also tested for the existence of cotolerance to Cu and Zn in S. luteus. Isolates from Cu-polluted, Zn-polluted, and nonpolluted sites were grown in vitro on Cu- or Zn-supplemented medium. The Cu mine isolates exhibited high Cu tolerance, whereas the Zn-tolerant isolates were shown to be Cu sensitive, and vice versa. This indicates the evolution of metal-specific tolerance mechanisms is strongly triggered by the pollution in the local environment. Cotolerance does not occur in the S. luteus isolates studied. In a dose-response experiment, the Cu sensitivity of nonmycorrhizal Pinus sylvestris seedlings was compared to the sensitivity of mycorrhizal seedlings colonized either by a Cu-sensitive or Cu-tolerant S. luteus isolate. In nonmycorrhizal plants and plants colonized by the Cu-sensitive isolate, root growth and nutrient uptake were strongly inhibited under Cu stress conditions. In contrast, plants colonized by the Cu-tolerant isolate were hardly affected. The Cu-adapted S. luteus isolate provided excellent insurance against Cu toxicity in pine seedlings exposed to elevated Cu levels. Such a metal-adapted Suillus-Pinus combination might be suitable for large-scale land reclamation at phytotoxic metalliferous and industrial sites.
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Georgieva, Natalia, Ivelina Nikolova, and Plamen Marinov-Serafimov. "Comparative characteristics of Lupinus albus L. and Lupinus luteus L. under allelopathic effect of Sorghum halepense L. (Pers.)." Pesticidi i fitomedicina 30, no. 1 (2015): 41–50. http://dx.doi.org/10.2298/pif1501041g.
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Allelopathic effects of aqueous extracts of Sorghum halepense L. (Pers.) on seed germination and primary seedling growth and development of two lupine species was studied. Lupinus albus and Lupinus luteus showed different levels of susceptibility to the allelopathic effect of weed extracts. Increasing concentrations (1.25, 2.50, 5.00 and 10.00%) of extracts from aboveground and belowground biomass suppressed seed germination of L. luteus from 53.2 to 74.7%. The germination of L. albus seeds was unaffected, except by the highest concentration of 10.00%. Fresh biomass accumulation in the initial germ of L. luteus was inhibited by 3.8-40.3% under the effect of concentrations of 2.50, 5.00 and 10.00%, which made the species susceptible to S. halepense extracts. L. albus was tolerant as it was not found to sustain a significant allelopathic effect of the extracts.
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Byun, Ha Ram, Seon Young Park, Ee Taek Hwang, et al. "Antimicrobial Air Filter Coating with Plant Extracts Against Airborne Microbes." Applied Sciences 10, no. 24 (2020): 9120. http://dx.doi.org/10.3390/app10249120.
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Antimicrobial air filters are required to protect humans from the risk of secondary bioaerosol pollution as well as airborne particles. Three plant extracts (tea-tree oil, rosemary, and garlic) were selected to replace antimicrobial chemicals in air filters. The antimicrobial activity of plant extracts was investigated using Micrococcus luteus and Escherichia coli. Phytochemicals present in the three plant extracts were identified using a gas chromatograph coupled with a mass spectrometer. The extracts were spray-coated on polyethylene terephthalate filter surfaces using silicate polymeric coating and evaluated via X-ray photoelectron spectroscopy and a scanning electron microscope with energy dispersive spectroscopy. After coating, an increase of 9.1% in the pressure drop was observed. The strain Micrococcus luteus was used to evaluate the antimicrobial activity of the air filter. After bioaerosol exposure, the tea-tree oil-coated filters immediately induced M. luteus cell inactivation (40–55%), whereas the rosemary and garlic coated filters did not. However, 48 h after exposure, a significant M. luteus inactivation of 99.99%, 99.0%, and 99.9% was recorded for concentrations of 2.89, 6.73, and 11.51 mg/cm2 for the tea-tree, rosemary, and garlic extracts, respectively. The coated filters exhibited high antimicrobial activity, thereby indicating significant potential for application as self-cleaning air filters.
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Mamani-Ochochoque, Juan, Yeni Karina Atencio-Hancco, Edwin Uriel Huanca-Ramos, Miriam Judith Quispe-Quispe, and George Argota-Pérez. "Viabilidad de Orestias luteus Valenciennes, 1846 con dependencia alimentaria del saco vitelino." Biotempo 20, no. 1 (2023): 97–100. http://dx.doi.org/10.31381/biotempo.v20i1.5722.
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El objetivo del estudio fue describir la viabilidad de Orestias luteus Valenciennes, 1846 con dependencia alimentariadel saco vitelino. la tendencia a la muerte de las prelarvas durante los primeros siete días fue en aumento. El estudio serealizó en el laboratorio de cultivo prototipo de la Fundación Titicaca Perú (FUNTI-PERU), Puno, Perú. Se utilizó comomaterial biológico, 100 unidades de prelarvas de O. luteus donde se distribuyeron en dos acuarios con 50 ejemplarescada uno. Se controló la calidad ambiental del agua medidor multiparamétrico HANNA HI98194 (temperatura =12°C-15°C, oxígeno disuelto = 6,0 mg·L-1 – 6,3 mg·L-1, pH = 7,0 – 7,5). Durante 15 días se realizó el recambio de aguadurante cinco veces con una frecuencia cada tres días. Las prelarvas de O. luteus no se alimentaron durante los primerossiete días y desde el octavo al décimo día se le suministró como dieta exógena Artemia salina Linnaeus, 1758. Sinembargo, al octavo día cuando se suministró A. salina la tendencia fue a la disminución de la mortalidad. Se concluye,que la supervivencia de O. luteus disminuye una vez que trascurren los tres primeros días, aun cuando existe presenciadel saco vitelino. Asimismo, existió tendencia a mantenerse la viabilidad cuando hubo dependencia de la alimentaciónexógena mediante la A. salina.
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RICHARDS, Paul G., David J. WALTON, and John HEPTINSTALL. "The effects of tyrosine nitration on the structure and function of hen egg-white lysozyme." Biochemical Journal 315, no. 2 (1996): 473–79. http://dx.doi.org/10.1042/bj3150473.
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We have investigated the effects of tyrosine nitration (to form the weak acid, 3-nitrotyrosine) at positions 23 or 20 plus 23, on the structure and function of hen egg-white lysozyme. Enzyme activity against Micrococcus luteus cell-wall fragments or soluble substrates exhibits two phenomena. (a) A decrease in Km and kcat for the hydrolysis of soluble oligo- and poly-saccharides, resulting in only minor changes in the catalytic efficiency (kcat/Km) upon nitration. (b) The hydrolysis of M. luteus cell-wall fragments appeared to be dominated by electrostatic interactions with the protein, giving a decrease in enzyme activity as the 3-nitrotyrosyl group became ionized. Removal of the cell-wall anionic polymer, teichuronic acid, from M. luteus abolished this effect. The 3-nitrotyrosine group was also found to act as a fluorescence quencher of exposed tryptophan residues in lysozyme.
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Revina, Lyudmila P., Lyubov I. Kostina, Maria A. Dronina, et al. "Novel antibacterial proteins from entomocidal crystals of Bacillus thuringiensis ssp. israelensis." Canadian Journal of Microbiology 51, no. 2 (2005): 141–48. http://dx.doi.org/10.1139/w04-121.
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Proteins with molecular masses of 36 and 34 kDa (Bti36 and Bti34) were isolated from entomocidal crystals formed by Bacillus thuringiensis ssp. israelensis cells. The samples of Bti36 contained the admixture of a protein with a molecular mass of 33 kDa (Bti33), apparently a product of proteolysis of Bti36. These 3 proteins are significantly different in N-terminal sequences from known δ-endotoxins of B. thuringiensis and show antibacterial activity toward Micrococcus luteus. The combination of Bti36 and Bti33 also suppresses the growth of some other microorganisms including Streptomyces chrysomallus. The effects of the mixture of Bti36 and Bti33 on the M. luteus cell surface and on the surface of S. chrysomallus cells and exospores are similar, but they are different from the effect of endotoxin Cry11A on micrococcal cells.Key words: Bacillus thuringiensis, δ-endotoxins, antibacterial activity, Micrococcus luteus, Streptomyces chrysomallus.
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Zarubina, N. E., S. V. Teletskaja, and A. I. Golovach. "The contents of 137Cs in Suillus luteus in the territories with different levels of radionuclides pollution of soil (Kiev region)." Nuclear Physics and Atomic Energy 7, no. 1 (2006): 81–85. https://doi.org/10.15407/jnpae2006.01.081.
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Accumulation of 137Cs by Suillus luteus passed in two stages. Since 1986 up to the middle of 90th the annual increase in levels of specific activity of radiocesium was marked; at the second stage (from the middle of 90th to present time) there is a gradual decrease in the contents of 137Cs in S. luteus. In the tests selected in the autumn of 1986 on ranges of Kyiv region, the contents of 137Cs varied within the limits of 80 - 800 Bq/kg of fresh weight. In 10 years after accident the disorder of specific activity values of 137Cs in "dirty" and rather "pure" territories has increased up to 2000 times. At the second stage speed of decrease in the contents of 137Cs in S. luteus is different for the territories with various level of soil pollution.
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Basem A. A. Al-Sahlani, Atheer H. Ali, and Thamir K. Adday. "Ergasilus luteusi Al-Sahlany, Adday et Ali, 2024 (CYCLOPOIDA: ERGASILIDAE) parasite of two fishes and effect of length groups, gender and season in Al-Gharraf River, Southern Iraq." University of Thi-Qar Journal of agricultural research 13, no. 2 (2024): 176–88. https://doi.org/10.54174/9n9wkf63.
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The copepod Ergasilus Nordman, 1832 common ectoparasite of both freshwater and marine fishes; however the present work aim to study ecological aspect of new parasite Ergasilus sp. parasite on two freshwater cyprinid (Planiliza abu and Carasobarbus lutues) occurred in Al-Gharraf River, Thi Qar Province, Southern Iraq. The seasonal prevalence by Ergasilus sp. with C. luteus differ little from that from P. abu; while the higher prevalence with the crustacean is found in the median group length of both fish species. The results are discussed according to the variation in environmental factor between seasons, physiological aspect between males and females and the correspondence between second antenna of the parasite and size of gill fillaments.
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Ševčíková, Hana. "Variability and distribution of Pluteus luteus, a later synonym of P. variabilicolor." Mycotaxon 136, no. 1 (2021): 201–13. http://dx.doi.org/10.5248/136.201.
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The type specimen of Pluteus luteus was studied morphologically and molecularly using DNA sequences of the ITS region of the ribosomal RNA gene. Pluteus luteus is reduced to a synonym of P. variabilicolor, the morphological variability of which is discussed. The distribution of P. variabilicolor as a species native to Europe and Asia is summarized, including the first collection from Slovakia and the second report from the Republic of Korea (South Korea).
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Kazimierski, T., and M. Kazimierska. "Morphological and cytological differences within the species Lupinus luteus L." Acta Societatis Botanicorum Poloniae 44, no. 2 (2015): 265–75. http://dx.doi.org/10.5586/asbp.1975.023.
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The <i>Lupinus luteus</i> L. from five different geographical proveniences were investigated morphologically and cytologically. The plants originating from Palestine differ from the rest in many morphological traits. Cytologically they differ by one chromosomal translocation. The Palestinian plants give semisterile F1 hybrids with the rest of the species. They are described as a new subspecies: <i>Lupinus luteus</i> L. ssp. orientalis Kazim. et. Kazim.
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Andleeb, Saiqa, Iqra Batool, Shaukat Ali, Kalsoom Akhtar, and Nazish Mazhar Ali. "Accumulation of Heavy Metals by Living and Dead Bacteria as Biosorbents: Isolated from Waste Soil." Biological Sciences - PJSIR 60, no. 2 (2017): 102–11. http://dx.doi.org/10.52763/pjsir.biol.sci.60.2.2017.102.111.
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In the present study Enterococcus luteus, Escherichia coli and Staphylococcus aureus have beenused for biosorption of cadmium and chromium from aqueous solution of various concentrations. Bacteriawere isolated from waste soil and identified through various morphological features, biochemical tests,and staining procedure. Biosorption capacity (both dead and live biomass) was observed through brothtechnique and absorbance values were measured using atomic absorbance spectrophotometer. Differentparameters were optimised for metal biosorption, including incubation periods (24, 48, 72 and 96 h) andpH (4, 6, 7, 8, 9, and 10) at 37 °C. Agar well and agar disc diffusion methods were used for resistogramand antibiogram analysis. Through agar well diffusion method, S. aureus showed complete resistanceagainst all concentrations of chromium and cadmium (50 to 300 µg/mL). E. luteus showed resistance on50 µg/mL and 100 µg/mL of both metals while E. coli exhibited resistance against all cadmium concentrations(50 to 300 µg/mL) while sensitivity was observed in case of chromium (12.0 ± 0.0 mm to 24.0 ± 0.0 mm).Through broth method, E. luteus showed good cadmium absorbance capacity at acidic pH 4 and 6, E. coliat pH 4, 6 and 7 and S. aureus at pH 6, 7 and 8. In case of chromium, S. aureus showed maximumabsorbance at pH 6; E. coli at pH 7 and 8 and E. luteus showed minimum absorbance for chromium at pH6 and 8. All bacterial isolates showed maximum biosorption of both metals after 24 h of incubation. Resultssuggested that pH 6 and incubation period 24 h could be better for biosorption of cadmium and chromiumremoval. Dead biomass of E. coli and S. aureus was more efficient for cadmium removal while both deadand live biomass (E. luteus, E. coli and S. aureus) have potential for chromium removal. These microbescould be used as potential source of heavy metal biosorbent, biosorbent
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Celiksoy, Vildan, Rachael L. Moses, Alastair J. Sloan, Ryan Moseley, and Charles M. Heard. "Synergistic In Vitro Antimicrobial Activity of Pomegranate Rind Extract and Zinc (II) against Micrococcus luteus under Planktonic and Biofilm Conditions." Pharmaceutics 13, no. 6 (2021): 851. http://dx.doi.org/10.3390/pharmaceutics13060851.
Full textAbstract:
Infectious diseases caused by microbial biofilms are a major clinical problem, and new antimicrobial agents that can inhibit biofilm formation and eradicate pre-formed biofilms are urgently needed. Pomegranate extracts are a well-established folkloric medicine and have been used in the treatment of infectious diseases since ancient times, whilst the addition of metal ions, including zinc (II), has enhanced the antimicrobial activity of pomegranate. Micrococcus luteus is generally a non-pathogenic skin commensal bacterium, although it can act as an opportunistic pathogen and cause serious infections, particularly involving catheterization and comorbidities. The aims of this study were to evaluate the holistic activity of pomegranate rind extract (PRE), Zn (II), and PRE/Zn (II) individually and in combination against M. luteus under both planktonic and biofilm conditions. Antimicrobial activity was detected in vitro using the broth dilution method, and synergistic activity was determined using checkerboard and time-kill assays. Effects on biofilm formation and eradication were determined by crystal violet and BacLightTM Live/Dead staining. PRE and Zn (II) exerted antimicrobial activity against M. luteus under both planktonic and biofilm conditions. After 4 h, potent synergistic bactericidal activity was also found when PRE and Zn (II) were co-administered under planktonic conditions (log reductions: PRE 1.83 ± 0.24, Zn (II) 3.4 ± 0.08, and PRE/Zn (II) 6.88 ± 1.02; p < 0.0001). In addition, greater heterogeneity was induced in the structure of M. luteus biofilm using the PRE/Zn (II) combination compared to when PRE and Zn (II) were applied individually. The activity of PRE and the PRE/Zn (II) combination could offer a novel antimicrobial therapy for the treatment of disease-associated infections caused by M. luteus and potentially other bacteria.
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Dorrah, M.A., A.A. Mohamed, and E.H. Shaurub. "Immunosuppressive effects of the limonoid azadirachtin, insights on a nongenotoxic stress botanical, in flesh flies." Pesticide Biochemistry and Physiology 153 (December 4, 2019): 55–66. https://doi.org/10.1016/j.pestbp.2018.11.004.
Full textAbstract:
<strong>Abstract</strong> The tetranortriterpenoid azadirachtin (Aza) is a well-known insect growth disruptor of plant origin. Although its actions on insects have been extensively studied; fragmentary reports are available from the immunological point of view. Therefore, in the present study, total (THC) and differential hemocyte counts (DHC), nodulation, phenoloxidase (PO) activity, immune-reactive lysozymes and inducible nitric oxide (NO) were assessed, as measures of immune responses, in <em>Sarcophaga</em> argyrostoma 3<sup>rd</sup> instars challenged individually with <em>M. luteus</em> or Aza, or in combination with both compared to the control larvae. THC was significantly declined after 12 h and 24 h of treatment with Aza. DHC varied considerably; in particular, plasmatocytes were significantly decreased after 36 h and 48 h of treatment with Aza; whereas granulocytes were significantly increased. Nodulation was significantly increased with the increase of time after all treatments. Challenging with <em>M. luteus</em> significantly increased the activity of PO in hemocytes and plasma; whereas such activity was significantly decreased after treatment with Aza or combined Aza and <em>M. luteus</em>. Treatment with Aza or <em>M. luteus</em> alone or in couple significantly increased lysozyme activity of fat body, hemocytes and plasma. However, challenging with <em>M. luteus</em> significantly increased NO concentration in the same tissues. A hypothetical model of Aza as a potential mutagen is presented. However, no genotoxic effect was observed through tracking apoptosis-associated changes in Aza-treated hemocytes via flow cytometry-based apoptosis detection. Our study suggests that the integration of Aza, as an eco-friendly pesticide, with bacterial biopesticides may be a successful approach for controlling insect pests.
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Anggia, Vivi, Amri Bakhtiar, and Dayar Arbain. "The Isolation of Xanthones from Trunk Latex of Garcinia mangostana Linn. and Their Antimicrobial Activities." Indonesian Journal of Chemistry 15, no. 2 (2015): 187–93. http://dx.doi.org/10.22146/ijc.21213.
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ɑ-Mangostin (1), β-mangostin (2) and gartanin (3) have been isolated from the trunk latex of Garcinia mangostana Linn. and investigated for their antimicrobial activities against Bacillus subtilis, Enterococcus faecalis, Micrococcus luteus, Salmonella typhosa, Staphylococcus epidermidis, Streptococcus mutans and Vibrio cholerae. The significant antibacterial activity showed by α-mangostin (1) against Bacillus subtilis, Enterococcus faecalis. Staphylococcus epidermidis and Vibrio cholerae, but all compounds showed no activity to inhibit the growth of Micrococcus luteus and Streptococcus mutans.
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Yudina, Tatyana G., Anna V. Konukhova, Lyudmila P. Revina, Lyubov I. Kostina, Igor A. Zalunin, and Galina G. Chestukhina. "Antibacterial activity of Cry- and Cyt-proteins fromBacillus thuringiensisssp.israelensis." Canadian Journal of Microbiology 49, no. 1 (2003): 37–44. http://dx.doi.org/10.1139/w03-007.
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Mosquitocidal endotoxins Cry4B, Cry11A, and CytA from Bacillus thuringiensis ssp.israelensis as well as the products of their limited proteolysis display antibacterial activity relative to Micrococcus luteus. The endotoxin Cry11A also induces the lysis of the micrococcus protoplasts. Potassium and sodium ions and N-acetylgalactosamine increased the antibacterial effect of Cry11A, whereas glucose and N-acetylglucosamine inhibited it. The endotoxin Cry11A displays the antibacterial effect on some other microorganisms.Key words: Bacillus thuringiensis, Micrococcus luteus, δ-endotoxins, antibacterial activity.
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Al-Saadi, Abid Ali Jenzeel Jbara, and Rabab A. Rasheed. "First record of Myxobolus problematicus from gills of Carasobarbus luteus fish from Tigris river, Al-Shawwaka region in Baghdad city, Iraq." Journal of Kerbala for Agricultural Sciences 5, no. 5 (2018): 89–94. http://dx.doi.org/10.59658/jkas.v5i5.141.
Full textAbstract:
A total of 35 specimens of the fish Carasobarbus luteus (Heckel, 1843) were collected from Tigris River in Al-Shawwaka region in Baghdad city. The results showed that fish were found to be infected with five species of parasites, these parasites were Myxobolus chondrostomi, M. problematicus, Dactylogyrus bocageii, D. lenkorani and Procamallanus viviparous. In addition which were M. problematicus considered as a first record in Iraq, as well as C. luteus as a new host in Iraq for these five species of parasites.
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Abdul-Hussain Al-Sa'adi, Bashar. "Barbus luteus (Heckel, 1843) fish as a new host to the ciliated parasite Vorticella globularia for the first time in Iraq." Al-Kufa University Journal for Biology 13, no. 1 (2021): 38–41. http://dx.doi.org/10.36320/ajb/v13.i1.11774.
Full textAbstract:
Ten B. luteus fishes had been collecting from fishermen that fishing by throw net from Euphrates river Al-mussab city during 25 June to 10 July 2018, and examined it, throughout looking for parasite infection, ciliated was arise in four of it, then start measuring it and comparing it with what the taxonomy references and what other researcher find, then the parasite considered as a new intrusive on B. luteus fish and this fish as a new host for it in Iraq.
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Fedorenko, S., I. Pestushko, N. Prykuda, and A. Zadorozhnyi. "Septicemia caused by Micrococcus luteus. Example of a clinical case." Bukovinian Medical Herald 25, no. 2(98) (2021): 154–57. http://dx.doi.org/10.24061/2413-0737.xxv.2.98.2021.25.
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Micrococcus luteus is a representative of normal microflora of the human skin, which is commonly localized on open surfaces of the body. Dissemination of the agent with disease development is possible if intactness of the skin is impaired. Aim of the paper – to present a clinical case of septicemia caused by Micrococcus luteus.Results. A clinical case of septicemia, caused by Micrococcus luteus, in a 39-year-old patient treated in an inpatient department of Infectious Diseases Communal Clinical Hospital in Lviv. Conclusion. A presented clinical case demonstrates a severe course of septicemia caused by Micrococcus luteus with involvement of internal organs in the process, in particular, accompaniment of community-acquired left-sided pneumonia, exudative pleurisy, pericarditis, and meningitis. Although antibacterial therapy was prescribed to this patient on admission to an inpatient department, the result in treatment could be achieved only after thorough additional examination of the patient, conduction of proper bacteriological tests and determination of sensitivity of the agent to antibacterial medicines.
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Csősz, Sándor, Enrico Schifani, Bernhard Seifert, Antonio Alicata, and Matthew M. Prebus. "A new species of yellow acorn ant discovered in Italy via integrative taxonomy (Temnothorax luteus-complex, Formicidae)." Evolutionary Systematics 8, no. 2 (2024): 183–97. http://dx.doi.org/10.3897/evolsyst.8.124557.
Full textAbstract:
The Mediterranean, a global hotspot for rare ant species, hosts a significant representation of the global diversity of the mainly Holarctic ant genus Temnothorax. However, several groups still require significant taxonomic efforts. The taxonomy of the T. luteus complex species was revised in 2014 when morphometrics allowed distinguishing two valid species and two synonyms out of four taxa that had been originally described from France. The two species recognized since then are T. luteus, distributed from Iberia to the Alps, and the largely sympatric but much more xerothermophilic T. racovitzai. In Italy, only a few records of the complex were ever published, and the identity of the Italian population was never thoroughly assessed. We combined morphometrics with phylogenomic data to assess the identity of the T. luteus populations that spanned from Sicily to the Italian Alps and discovered that all Italian samples belong to a new cryptic species, which we describe as T. apenninicussp. nov. whose glacial refugium was probably in the southern Apennines.
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Gannesen, Andrei V., Rustam H. Ziganshin, Maria A. Ovcharova, et al. "Epinephrine Affects Ribosomes, Cell Division, and Catabolic Processes in Micrococcus luteus Skin Strain C01: Revelation of the Conditionally Extensive Hormone Effect Using Orbitrap Mass Spectrometry and Proteomic Analysis." Microorganisms 11, no. 9 (2023): 2181. http://dx.doi.org/10.3390/microorganisms11092181.
Full textAbstract:
In the current study, extensive Orbitrap mass spectrometry analysis was conducted for skin strain Micrococcus luteus C01 planktonic cultures and biofilms after 24 h and 72 h of incubation either in the presence of epinephrine or without any implementations. The investigation revealed the complex and conditionally extensive effect of epinephrine at concentrations closer to normal blood plasma concentrations on both planktonic cultures and biofilms of skin strain M. luteus C01. The concentrations of hundreds of proteins changed during the shift from planktonic growth mode to biofilm and hundreds of proteins were downregulated or upregulated in the presence of epinephrine. Ribosomal, TCA, and cell division proteins appear to be the most altered in their amounts in the presence of the hormone. Potentially, the regulatory mechanism of this process is connected with c-di-GMP and histidine kinases, which were affected by epinephrine in different samples. The phenomenon of epinephrine-based biofilm regulation in M. luteus C01 has wide implications for microbial endocrinology and other research areas.
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Wilson, CE, and N. Thurling. "Effect of sowing depth and water potential on seedling emergence of Lupinus species." Australian Journal of Experimental Agriculture 36, no. 4 (1996): 463. http://dx.doi.org/10.1071/ea9960463.
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Large differences in responses of germination and seedling emergence to water potential and sowing depth were detected among Lupinus species varying substantially in seed size. Seeds of 7 species (L. pilosus, L. atlanticus, L. albus, L. cosentinii, L. luteus, L. angustifolius and L. hispanicus) germinated rapidly in moist sand (-0.05 MPa). Germination of all these species was reduced when seeds were raised in sand in which water potential was increased from -1.0 to -0.5 MPa at 4 days after sowing, and then to -0.2 MPa at 18 days after sowing. Percentage germination after 20 days was much higher in small-seeded species (L. hispanicus, L. angustifolius, L. luteus) than in large-seeded species (L. albus, L. atlarzticus, L. pilosus). Germination responses were related to rate of water uptake by seeds from sand at 0.5 MPa. Seedling emergence of pre-germinated seeds sown at different depths in moist (-0.05 MPa) and dry (-0.3 MPa) sand varied greatly among 6 species. An increase in sowing depth from 4 to 8 cm retarded seedling emergence to a greater extent than a decrease in water in L. piosus, L. luteus, L. cosentinii and L. atlanticus. L. angustifolius seedling emergence was less affected by variation in sowing depth and water potential than other species, although a decrease in water potential had a relatively large effect on seedling emergence from 4 cm. A decrease in water potential also decreased seedling emergence of L. albus more than deeper sowing. Seedling emergence responses of 4 species (L. angustifolius, L. luteus, L. albus, L. atlanticus) were compared in an experiment where dry seeds were sown in dry sand (-0.3 MPa) at different distances above a moist sand (-0.05 MPa) zone in specially constructed trays. Small-seeded species (L. angustifolius and L. luteus) emerged most rapidly from the shallowest sowing (3 cm below the surface, 9 cm above the moist zone), whereas the large-seeded species L. albus and L. atlanticus emerged most rapidly from sowings at intermediate depths (6 and 9 cm). L. albus and L. angustifolius seedlings emerged far more rapidly when sown on the surface of the moist sand (12 cm) than did L. luteus and L. atlanticus, and were far more tolerant of variation in sowing depth. The implications of these findings are discussed with particular reference to improving lupin crop establishment following early dry sowing in the West Australian wheatbelt.