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Journal articles on the topic 'Microorganisms isolated from specialized niche'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Weltzer, Michael L., and Scott R. Miller. "Ecological Divergence of a Novel Group of Chloroflexus Strains along a Geothermal Gradient." Applied and Environmental Microbiology 79, no. 4 (2012): 1353–58. http://dx.doi.org/10.1128/aem.02753-12.

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ABSTRACTEnvironmental gradients are expected to promote the diversification and coexistence of ecological specialists adapted to local conditions. Consistent with this view, genera of phototrophic microorganisms in alkaline geothermal systems generally appear to consist of anciently divergent populations which have specialized on different temperature habitats. At White Creek (Lower Geyser Basin, Yellowstone National Park), however, a novel, 16S rRNA-defined lineage of the filamentous anoxygenic phototrophChloroflexus(OTU 10, phylumChloroflexi) occupies a much wider thermal niche than other 16

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Gradova, N. B., S. P. Sivkov, E. V. Agalakova, et al. "A Preparation based on Bacteria Isolated from Hypersaline Environments to Improve the Functional and Protective Characteristics of Concrete." Biotekhnologiya 36, no. 4 (2020): 21–28. http://dx.doi.org/10.21519/0234-2758-2020-36-4-21-28.

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Improving the strength and stability of cement-based structures in adverse environmental conditions with associated anthropogenic influences is possible through the development and implementation of nature-like and nature-friendly technologies. The ability of urobacteria to precipitate calcium carbonate can be useful in the manufacture of self-healing and reinforced concrete, in the crack healing and the restoration of concrete structures. Hypersaline environment is an ecological niche for search for microorganisms that are resistant to increased alkalinity, changing environmental conditions a

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Ceniceros, Ana, Lorena Cuervo, Carmen Méndez, José A. Salas, Carlos Olano, and Mónica G. Malmierca. "A Multidisciplinary Approach to Unraveling the Natural Product Biosynthetic Potential of a Streptomyces Strain Collection Isolated from Leaf-Cutting Ants." Microorganisms 9, no. 11 (2021): 2225. http://dx.doi.org/10.3390/microorganisms9112225.

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The rapid emergence of bacterial resistance to antibiotics has urged the need to find novel bioactive compounds against resistant microorganisms. For that purpose, different strategies are being followed, one of them being exploring secondary metabolite production in microorganisms from uncommon sources. In this work, we have analyzed the genome of 12 Streptomyces sp. strains of the CS collection isolated from the surface of leaf-cutting ants of the Attini tribe and compared them to four Streptomyces model species and Pseudonocardia sp. Ae150A_Ps1, which shares the ecological niche with those

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Yang, Joo Young, Mi Hwa Park, Ji Yeong Park, et al. "Diversity and characteristics of specialized microorganisms in the Sacheon region isolated from fermented agricultural products." Food Engineering Progress 29, no. 1 (2025): 89–102. https://doi.org/10.13050/foodengprog.2025.29.1.89.

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To investigate the diversity of industrially useful microorganisms from fermented agricultural products in the Sacheon region, 128 strains were isolated and analyzed phylogenetically. The analysis indicated that the isolates were categorized into three phyla, eight families, 13 genera, and 33 species. The Bacillaceae family, which was the main taxon, comprised 88.3% of the isolates and included four genera and 22 species: Bacillus, Exiguobacterium, Fictibacillus, and Metabacillus. The Caryophanaceae family, which was the second most abundant taxon, comprised 3.9% of the isolates, including two

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Toure, Seinde, Marion Millot, Lucie Ory, et al. "Access to Anti-Biofilm Compounds from Endolichenic Fungi Using a Bioguided Networking Screening." Journal of Fungi 8, no. 10 (2022): 1012. http://dx.doi.org/10.3390/jof8101012.

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Endolichenic microorganisms represent a new source of bioactive natural compounds. Lichens, resulting from a symbiotic association between algae or cyanobacteria and fungi, constitute an original ecological niche for these microorganisms. Endolichenic fungi inhabiting inside the lichen thallus have been isolated and characterized. By cultivation on three different culture media, endolichenic fungi gave rise to a wide diversity of bioactive metabolites. A total of 38 extracts were screened for their anti-maturation effect on Candida albicans biofilms. The 10 most active ones, inducing at least

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López-Palestino, Aylin, Regina Gómez-Vargas, Mirna Suárez-Quiroz, et al. "Probiotic Potential of Lactic Acid Bacteria and Yeast Isolated from Cocoa and Coffee Bean Fermentation: A Review." Fermentation 11, no. 2 (2025): 95. https://doi.org/10.3390/fermentation11020095.

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The market for probiotic foods has grown significantly in recent years. Some microorganisms isolated from food fermentations, mainly lactic acid bacteria (LAB) and yeasts, may have probiotic potential. During the fermentation of cocoa and coffee, a plethora of microorganisms are involved, including yeasts and lactic acid bacteria (LAB), several of which may have probiotic potential. For this reason, this study aimed to overview the probiotic potential of some LAB and yeasts isolated from these fermentation processes. For this purpose, a search was conducted in several specialized databases (Go

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Popova, Alexandra A., Olga A. Koksharova, Valentina A. Lipasova, et al. "Inhibitory and Toxic Effects of Volatiles Emitted by Strains ofPseudomonasandSerratiaon Growth and Survival of Selected Microorganisms,Caenorhabditis elegans, andDrosophila melanogaster." BioMed Research International 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/125704.

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In previous research, volatile organic compounds (VOCs) emitted by various bacteria into the chemosphere were suggested to play a significant role in the antagonistic interactions between microorganisms occupying the same ecological niche and between bacteria and target eukaryotes. Moreover, a number of volatiles released by bacteria were reported to suppress quorum-sensing cell-to-cell communication in bacteria, and to stimulate plant growth. Here, volatiles produced byPseudomonasandSerratiastrains isolated mainly from the soil or rhizosphere exhibited bacteriostatic action on phytopathogenic

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Saggese, Anella, Rosa Giglio, Nicola D’Anzi, Loredana Baccigalupi, and Ezio Ricca. "Comparative Genomics and Physiological Characterization of Two Aerobic Spore Formers Isolated from Human Ileal Samples." International Journal of Molecular Sciences 23, no. 23 (2022): 14946. http://dx.doi.org/10.3390/ijms232314946.

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Spore formers are ubiquitous microorganisms commonly isolated from most environments, including the gastro-intestinal tract (GIT) of insects and animals. Spores ingested as food and water contaminants safely transit the stomach and reach the intestine, where some of them germinate and temporarily colonize that niche. In the lower part of the GIT, they re-sporulate and leave the body as spores, therefore passing through their entire life cycle in the animal body. In the intestine, both un-germinated spores and germination-derived cells interact with intestinal and immune cells and have health-b

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Chikh, G., J. Pourquié, P. Kaiser, and A. M. Davila. "Characterization of the bacterial flora isolated from a pilot-scale lagoon processing swine manure." Canadian Journal of Microbiology 43, no. 11 (1997): 1079–83. http://dx.doi.org/10.1139/m97-154.

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The bacterial flora of an experimental plant that processes liquid swine manure by an aerated compartmented (multistage) lagoon system has been studied. The total flora is characterized by a larger number of oligotrophic bacteria than eutrophic ones. Each compartment displays a specific flora, different from the flora in the manure, and consisting of a complex assembly of Gram-negative and Gram-positive ubiquitous species, such as Aeromonas spp. and Pseudomonas spp., and specialized species, such as Sphingobacterium spp. and Corynebacterium spp. The fecal indicator microorganisms have been sho

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Cataneo, Caroline, Silvia Rita Marin da Silva Canini, Paulo de Tarso Oliveira e. Castro, Miyeko Hayashida, and Elucir Gir. "Evaluation of the sensitivity and specificity of criteria for isolation of patients admitted to a specialized cancer hospital." Revista Latino-Americana de Enfermagem 19, no. 5 (2011): 1072–79. http://dx.doi.org/10.1590/s0104-11692011000500003.

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Early isolation of patients possibly colonized by multi-resistant microorganisms can minimize their spread, reducing cases of hospital infection and the related costs. This study aimed to identify the sensitivity and specificity of the criteria for isolation of patients admitted to a specialized cancer hospital. Cross-sectional study with a population of 61 patients coming from other hospitals who were admitted to the hospital between March 1st and August 31th, 2009. At the moment of admission, a data collection instrument was filled out and nasal and anal swabs were collected for microbiologi

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de los Santos-Villalobos, Sergio, Alondra María Díaz-Rodríguez, María Fernanda Ávila-Mascareño, Andrea Denisse Martínez-Vidales, and Fannie Isela Parra-Cota. "COLMENA: A Culture Collection of Native Microorganisms for Harnessing the Agro-Biotechnological Potential in Soils and Contributing to Food Security." Diversity 13, no. 8 (2021): 337. http://dx.doi.org/10.3390/d13080337.

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COLMENA is a microbial culture collection dedicated to the characterization, classification, preservation, and transferal of native microorganisms isolated from various agro-systems and other ecosystems in Mexico. This collection aims to protect microbial diversity, reducing soil degradation, but also exploiting its agro-biotechnological potential. So far, COLMENA has isolated and cryopreserved soil microorganisms from different crops in two major agricultural regions in Mexico, the Yaqui Valley, Sonora, and the Fuerte Valley, Sinaloa. COLMENA has specialized in the identification and characte

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Abdel Moneim Sulieman, Abdelmalik Idris Idris, Nawaf Alshammari та ін. "Molecular Biodiversity of Bacteria Isolated from Medicago sativa Rhizosphere in Haʼil District, Saudi Arabia". Cellular and Molecular Biology 68, № 2 (2022): 1–7. http://dx.doi.org/10.14715/cmb/2022.68.2.1.

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Worldwide biodiversity is impacted strikingly by global environmental change, and thus its impact is reflected in all life aspects. Identifying microorganisms in environmental samples, particularly soil could be a valuable interest to study their effect on soil quality and plant growth. Through this study, we conducted a molecular characterization of bacteria found in the rhizosphere of Medicago sativa plants grown in Hai'l soil and we highlighted their main properties. The analysis of sequences revealed that the main bacterial isolates were Pseudarthrobacter, Metabacillus, Priestia, and Massi

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Waller, Spenser, Stacy L. Wilder, Michael J. Schueller, Alexandra B. Housh, and Richard A. Ferrieri. "Quantifying Plant-Borne Carbon Assimilation by Root-Associating Bacteria." Microorganisms 8, no. 5 (2020): 700. http://dx.doi.org/10.3390/microorganisms8050700.

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Herbaspirillum seropedicae is a rhizobacteria that occupies a specialized ecological niche in agriculture. As an endophyte and prolific grass root colonizer it has the potential to promote plant growth, enhancing crop yield in many cereal crops. While the mechanisms for plant growth promotion are controversial, the one irrefutable fact is these microorganisms rely heavily on plant-borne carbon as their main energy source in support of their biological functions. Unfortunately, the tools and technology enabling researchers to trace carbon exchange between plants and the microorganisms associati

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Genderjahn, Steffi, Simon Lewin, Fabian Horn, Anja M. Schleicher, Kai Mangelsdorf, and Dirk Wagner. "Living Lithic and Sublithic Bacterial Communities in Namibian Drylands." Microorganisms 9, no. 2 (2021): 235. http://dx.doi.org/10.3390/microorganisms9020235.

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Dryland xeric conditions exert a deterministic effect on microbial communities, forcing life into refuge niches. Deposited rocks can form a lithic niche for microorganisms in desert regions. Mineral weathering is a key process in soil formation and the importance of microbial-driven mineral weathering for nutrient extraction is increasingly accepted. Advances in geobiology provide insight into the interactions between microorganisms and minerals that play an important role in weathering processes. In this study, we present the examination of the microbial diversity in dryland rocks from the Ts

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Jiménez-Gómez, Saati-Santamaría, Igual, Rivas, Mateos, and García-Fraile. "Genome Insights into the Novel Species Microvirga brassicacearum, a Rapeseed Endophyte with Biotechnological Potential." Microorganisms 7, no. 9 (2019): 354. http://dx.doi.org/10.3390/microorganisms7090354.

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Plants harbor a diversity of microorganisms constituting the plant microbiome. Many bioinoculants for agricultural crops have been isolated from plants. Nevertheless, plants are an underexplored niche for the isolation of microorganisms with other biotechnological applications. As a part of a collection of canola endophytes, we isolated strain CDVBN77T. Its genome sequence shows not only plant growth-promoting (PGP) mechanisms, but also genetic machinery to produce secondary metabolites, with potential applications in the pharmaceutical industry, and to synthesize hydrolytic enzymes, with pote

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Aleksandrovich, Yu S., D. O. Ivanov, E. Yu Pavlovskaya, et al. "Features of Microbiota in Newborns in Critical Condition at Admission to the Intensive Care Unit of a Specialized Hospital." Messenger of ANESTHESIOLOGY AND RESUSCITATION 19, no. 2 (2022): 56–63. http://dx.doi.org/10.21292/2078-5658-2022-19-2-56-63.

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Clarification of etiology and identification of infectious agents in critically ill newborns is a very urgent problem of neonatal resuscitation.The objective. To study the characteristics of microbiota in critically ill newborns at admission to the intensive care unit (ICU) of a specialized hospital.Subjects and Methods. 165 critically ill newborns were examined, and bacteriological tests of blood, feces, and saliva were performed.Results. Positive culture results were obtained in 40 (24%) patients. The most frequent causative agent was S. epidermidis (47.5%). The detection rate of E. faecalis

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Mukhametzyanov, A. M., T. V. Kaydanek, A. A. Latypov, et al. "Microbial Landscape of the Respiratory Tract of Children with Cystic Fibrosis: Monitoring Results." Medicina 12, no. 4 (2024): 43–59. http://dx.doi.org/10.29234/2308-9113-2024-12-4-43-59.

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Background. The article presents the results of microbiological monitoring of microorganisms of the respiratory tract of patients with cystic fibrosis (CF), changes in the spectrum, palette, and antibacterial resistance during repeated hospitalizations in a specialized hospital. Purpose of the study. To analyze the results of microbiological examination of respiratory tract biomaterial of children with CF hospitalized in a multidisciplinary pediatric hospital to optimize epidemiological surveillance at the local level. Materials and methods. The material for the study was the results of a micr

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Yong, Sheau Ting, Chui Peng Teoh, Paris Leonardo Lavin, Marcelo A. González, and Clemente Michael Vui Ling Wong. "Antarctic Spore-Forming Microorganisms from Deception Island Inhibit the Growth of Various Bacterial Strains." Sains Malaysiana 53, no. 7 (2024): 1559–74. http://dx.doi.org/10.17576/jsm-2024-5307-07.

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Antarctic microbes have evolved and adapted unique strategies to survive in the harsh polar environment. Apart from the ability to adapt to the low nutrient soil content and extremely dry and cold polar environment, a particular strategy used by Antarctic bacteria is the production of antimicrobial compounds that can eliminate rivals in the same niche, giving them a competitive edge over other microbes. In contrast, it is unclear whether spore-forming microbes possess similar antimicrobial properties as one of their survival strategies, especially those from the Antarctic volcanic Deception is

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Esteban-Cuesta, Irene, Mirian Labrador, Katharina Hunt, et al. "Phenotypic and Genetic Comparison of a Plant-Internalized and an Animal-Isolated Salmonella Choleraesuis Strain." Microorganisms 9, no. 8 (2021): 1554. http://dx.doi.org/10.3390/microorganisms9081554.

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Contamination of fresh produce with human pathogens poses an important risk for consumers, especially after raw consumption. Moreover, if microorganisms are internalized, no removal by means of further hygienic measures would be possible. Human pathogenic bacteria identified in these food items are mostly of human or animal origin and an adaptation to this new niche and particularly for internalization would be presumed. This study compares a plant-internalized and an animal-borne Salmonella enterica subsp. enterica serovar Choleraesuis aiming at the identification of adaptation of the plant-i

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Ibrahim, Enas, and Rafea Hamzah. "Biofilm formation by Candida albicans and Candida glabrata isolated from urine specimens of diabetic Iraqi women." Journal of Life and Bio Sciences Research 2, no. 02 (2021): 59–63. http://dx.doi.org/10.38094/jlbsr20246.

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Biofilms are multicellular communities where microorganisms are grown and form an extracellular matrix that protects the pathogenic microorganisms from the immunity system and antimicrobial agents. This study is aimed to identify Candida spp. isolated from urine specimens by using traditional techniques, germ tube, growth on corn meal agar medium and chromogenic medium then determine the ability of isolates to producing biofilm by tube method (TM) and congo red agar method (CRA). In our study urine specimens were obtained from 174 diabetic females in the period of six months at the Al-Wafa Spe

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Hammer, Tobin J., Eli Le, and Nancy A. Moran. "Thermal niches of specialized gut symbionts: the case of social bees." Proceedings of the Royal Society B: Biological Sciences 288, no. 1944 (2021): 20201480. http://dx.doi.org/10.1098/rspb.2020.1480.

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Responses to climate change are particularly complicated in species that engage in symbioses, as the niche of one partner may be modified by that of the other. We explored thermal traits in gut symbionts of honeybees and bumblebees, which are vulnerable to rising temperatures. In vitro assays of symbiont strains isolated from 16 host species revealed variation in thermal niches. Strains from bumblebees tended to be less heat-tolerant than those from honeybees, possibly due to bumblebees maintaining cooler nests or inhabiting cooler climates. Overall, however, bee symbionts grew at temperatures

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Habiba, MU, S. Ahmed, A. Ahmed, and MM Rahman. "Growth inhibition of Salmonella by Leuconostoc species isolated from buffalo milk curd." Annals of Bangladesh Agriculture 27, no. 1 (2024): 93–104. http://dx.doi.org/10.3329/aba.v27i1.70899.

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Traditional fermented products are considered to be a niche for microbial diversity. Probiotics offer a unique approach for addressing the threat of antibiotic resistance. Therefore, the aim of the present study was to isolate Leuconostoc spp. from Buffalo milk curd, an artisanal fermented dairy product in Bangladesh and assess their growth inhibition competence against Salmonella sp. A total of 50 isolates were isolated and purified from five freshly prepared buffalo milk curd samples using two different media, with glucose or sucrose as the carbon source. Among these pure isolates, 37 were i

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Abdalla, Muna, and Lyndy McGaw. "Natural Cyclic Peptides as an Attractive Modality for Therapeutics: A Mini Review." Molecules 23, no. 8 (2018): 2080. http://dx.doi.org/10.3390/molecules23082080.

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Peptides are important biomolecules which facilitate the understanding of complex biological processes, which in turn could be serendipitous biological targets for future drugs. They are classified as a unique therapeutic niche and will play an important role as fascinating agents in the pharmaceutical landscape. Until now, more than 40 cyclic peptide drugs are currently in the market, and approximately one new cyclopeptide drug enters the market annually on average. Interestingly, the majority of clinically approved cyclic peptides are derived from natural sources, such as peptide antibiotics

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Williams, Sam E., Henry L. Stennett, Catherine R. Back, et al. "The Bristol Sponge Microbiome Collection: A Unique Repository of Deep-Sea Microorganisms and Associated Natural Products." Antibiotics 9, no. 8 (2020): 509. http://dx.doi.org/10.3390/antibiotics9080509.

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The deep ocean is the largest habitat for life on Earth, though the microorganisms that occupy this unique environmental niche remain largely unexplored. Due to the significant logistical and operational challenges associated with accessing the deep ocean, bioprospecting programmes that seek to generate novel products from marine organisms have, to date, focused predominantly on samples recovered from shallow seas. For this reason, the deep ocean remains a largely untapped resource of novel microbiological life and associated natural products. Here we report the establishment of the Bristol Sp

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Rodríguez-Saavedra, Carolina, Romina Rodríguez-Sanoja, Daniel Guillén, Carmen Wacher, and Gloria Díaz-Ruiz. "Streptococcus infantarius 25124 isolated from pozol produces a high molecular weight amylopullulanase, a key enzyme for niche colonization." Amylase 5, no. 1 (2021): 1–12. http://dx.doi.org/10.1515/amylase-2021-0001.

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Abstract Pozol is a beverage made with maize dough that is prepared after boiling the kernels in limewater, causing a decrease in soluble sugars, with starch being the main fermentable carbohydrate in the dough. Previously, Streptococcus infantarius ssp. infantarius 25124 (Sii-25124) was identified as the most amylolytic bacteria isolated in this product. Analysis of Sii-25124 amylolytic enzymes revealed two amylases, a cytoplasmic α-amylase of 55.7 kDa and an extracellular amylopullulanase of 246.3 kDa, with two catalytic domains, one typical of an α-amylase and another typical of a pullulana

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Calderón, Alfonso, and Virginia C. Rodríguez. "Prevalencia de mastitis bovina y su etiología infecciosa en sistemas especializados en producción de leche en el altiplano cundiboyacense (Colombia)." Revista Colombiana de Ciencias Pecuarias 21, no. 4 (2009): 8. http://dx.doi.org/10.17533/udea.rccp.324330.

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Summary Using the Californian Mastitis Test (CMT), 11.416 udder quarts belonging to 2.854 cows from 40 milk production specialized farms of the cundiboyacense plain, selected at random, were evaluated. Of the 3.931 positive quarts (from reaction trace to clinical cases), a milk sample was taken in order to isolate the microorganisms involved in bovine. The 34.44% for the quarter were positive al CMT, the 49.01% involved infectious microorganisms. Staphylococcus aureus was the main pathogenic agent with 29.09% of the total isolations. Contrary to the normal indications from the temperate areas

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Omelyanchuk, N. A., V. A. Cherenko, and E. V. Zemlyanskaya. "Root cap border cells as regulators of rhizosphere microbiota." Vavilov Journal of Genetics and Breeding 28, no. 8 (2025): 918–26. https://doi.org/10.18699/vjgb-24-99.

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A rhizosphere (a narrow area of soil around plant roots) is an ecological niche, within which beneficial microorganisms and pathogens compete with each other for organic carbon compounds and for the opportunity to colonize roots. The roots secrete rhizodeposits into the rhizosphere, which include border cells, products of root cell death and liquids secreted by living cells (root exudates). Border cells, which have their name due to their location in the soil next to the root (at the border of the root and soil), represent terminal differentiation of columella and adjacent lateral root cap cel

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Derkach, Svitlana, Artur Martynov, Nadiya Sklyar, Anatoly Maryushchenko, Nataly Kutsay, and Valentina Dyachenko. "(Information letter) Model of microorganism's inactivation for obtaining vaccines." Annals of Mechnikov Institute, no. 4 (December 4, 2023): 154–55. https://doi.org/10.5281/zenodo.10257508.

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A model has been proposed for the production of immune drugs that can be used in specialized institutions of the Ministry of Health and the National Academy of Medical Sciences of Ukraine. These institutions include research institutes, departments of medical and pharmacological universities, laboratories of clinical departments, and biotechnology. The model is based on a new method of photodynamic inactivation of pathogenic bacteria, which destroys their RNA and DNA without changing the antigenic composition of cellular components. The candidate microorganisms are pathogenic bacteria that hav

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Egbomuche, R. C., U. N. Ekwenye, O. J. Akinjogunla, A. O. Ikeh, and S. B. Akpan. "Bacterial and Fungal Isolates from Crude Oil Polluted Sediment in Eniong River, Itu, Nigeria." Journal of Basics and Applied Sciences Research 2, no. 1 (2024): 1–11. http://dx.doi.org/10.33003/jobasr-2024-v2i1-32.

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The need to know the level of contamination of radioactive elements, especially Microbial populations are crucial for the environment, providing vital ecosystem services such as biogeochemical cycling, decomposition, and degradation, which essential vital for the survival of all life forms on Earth. This study investigated the heterotrophic bacterial and fungal isolates in crude oil polluted sediment from the Eniong River using standard conventional analytical and culture-dependent techniques. The mean total heterotrophic bacterial (THBC) and mean total fungal counts (THFC) in sediment samples

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Ijoma, Grace N., Gbenga Adegbenro, Charles Rashama, and Tonderayi S. Matambo. "Peculiar Response in the Co-Culture Fermentation of Leuconostoc mesenteroides and Lactobacillus plantarum for the Production of ABE Solvents." Fermentation 7, no. 4 (2021): 212. http://dx.doi.org/10.3390/fermentation7040212.

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Two bacterial strains (CL11A and CL11D) that are capable of ABE fermentation, identified as Leuconostoc mesenteroides and Weissella cibari, were isolated from the soil surrounding the roots of bean plants. Another strain (ZM 3A), identified as Lactobacillus plantarum, which is capable of purely ethanolic fermentation was isolated from sugarcane. Glucose was used as a standard substrate to investigate the performance of these strains in mono—and co-culture fermentation for ABE production. The performance parameters employed in this study were substrate degradation rates, product and metabolite

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Jacoby, Richard P., Anna Martyn, and Stanislav Kopriva. "Exometabolomic Profiling of Bacterial Strains as Cultivated Using Arabidopsis Root Extract as the Sole Carbon Source." Molecular Plant-Microbe Interactions® 31, no. 8 (2018): 803–13. http://dx.doi.org/10.1094/mpmi-10-17-0253-r.

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The ability of microorganisms to use root-derived metabolites as growth substrates is a key trait for success in the rhizospheric niche. However, few studies describe which specific metabolites are consumed or to what degree microbial strains differ in their substrate consumption patterns. Here, we present a liquid chromatography-mass spectrometry (MS) exometabolomic study of three bacterial strains cultivated using either glucose or Arabidopsis thaliana root extract as the sole carbon source. Two of the strains were previously isolated from field-grown Arabidopsis roots, the other is Escheric

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Miller, Scott R., Carin Williams, Aaron L. Strong, and Darla Carvey. "Ecological Specialization in a Spatially Structured Population of the Thermophilic Cyanobacterium Mastigocladus laminosus." Applied and Environmental Microbiology 75, no. 3 (2008): 729–34. http://dx.doi.org/10.1128/aem.01901-08.

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ABSTRACT Laboratory evolution experiments suggest the potential for microbial populations to contribute significant ecological variation to ecosystems, yet the functional importance of genetic diversity within natural populations of microorganisms is largely unknown. Here, we investigated the distribution of genetic and phenotypic variation for a population of the cyanobacterium Mastigocladus laminosus distributed along the temperature gradient of White Creek, Yellowstone NP. A total of 153 laboratory strains were directly isolated from five sites with mean annual temperatures ranging between

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Czachura, Paweł, Paulina Janik, and Marcin Piątek. "Chaetocapnodium magnum and Chaetocapnodium polonicum from conifer resins disclose an unknown lifestyle in the Capnodiales (Dothideomycetes)." MycoKeys 119 (July 14, 2025): 315–33. https://doi.org/10.3897/mycokeys.119.159094.

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The paraphyletic order Capnodiales s. lat. was recently divided into eight orders based on phylogeny, morphology, and fungal lifestyle. As a consequence, Capnodiales s. str. was redefined to include fungi called sooty moulds, which grow on sugary exudates (honeydew) excreted by sap-feeding insects. Despite some exceptions, Capnodiales s. str. constitutes a highly specialized order comprising fungi adapted to this specific habitat. The order includes many genera, of which one of the best studied is the genus Chaetocapnodium. To date, Chaetocapnodium has accommodated 10 species, which are strict

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Fruet, Thomas Kehrwald, Julio Cesar Polonio, Halison Correia Golias, et al. "Prospection and antibacterial screening of metabolic extracts of endophytic fungi isolated from Tibouchina granulosa (Desr.) Cogn. (Melastomataceae)." Ciência e Natura 46 (November 22, 2024): e74647. https://doi.org/10.5902/2179460x74647.

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The multidrug resistance of pathogenic microorganisms against widely used antimicrobials has grown in recent years. Among the different sources of bioactive compounds, endophytic fungi stand out for their ability to produce important classes of bioactive substances. The present study investigated the chromatographic profiles and antimicrobial activity against 10 pathogenic strains (four included in critical priority by WHO) of the extracts of 12 endophytic fungi isolated from Tibouchina granulosa (Melastomataceae). The activity of the metabolites was evaluated using broth microdilution to dete

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Gopalan, Priya K., Matthew J. Christopher, and Daniel C. Link. "Disruption of the Osteoblast Niche by G-CSF Induces Hematopoietic Stem Cell Quiescence and Loss of Long-Term Repopulating Activity." Blood 110, no. 11 (2007): 2217. http://dx.doi.org/10.1182/blood.v110.11.2217.2217.

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Abstract There is evidence that hematopoietic stem cells (HSC) are physically localized to specialized areas in the bone marrow termed the vascular and osteoblast niches. It is not clear if there are differences in the capacity of these niches to support HSC function. We and others previously showed that G-CSF treatment suppresses both osteoblast number and function, effectively eliminating the osteoblast niche. In contrast, G-CSF treatment has no apparent effect on the microvasculature in the bone marrow, suggesting that the vascular niche is intact. In this study, we utilized this system to

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Sweany, Rebecca Ruth, Kenneth Eugene Damann, and Michael Douglas Kaller. "Comparison of Soil and Corn Kernel Aspergillus flavus Populations: Evidence for Niche Specialization." Phytopathology® 101, no. 8 (2011): 952–59. http://dx.doi.org/10.1094/phyto-09-10-0243.

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Aspergillus flavus is considered a generalist-opportunistic pathogen, but studies are beginning to show that A. flavus populations have strains specific to various hosts. The research objective was to determine whether A. flavus soil populations consist of solely saprophytic strains and strains which can be facultatively parasitic on corn. A. flavus was isolated from both corn kernels and soil within 11 Louisiana fields. Sixteen vegetative compatibility groups (VCGs) were identified among 255 soil isolates. Only 6 of the 16 VCGs were identified in the 612 corn isolates and 88% of corn isolates

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Vincent, Warwick F. "Evolutionary origins of Antarctic microbiota: invasion, selection and endemism." Antarctic Science 12, no. 3 (2000): 374–85. http://dx.doi.org/10.1017/s0954102000000420.

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Increasing interest in the ecological roles, conservation and biotechnological potential of Antarctic microbiota has focused attention on their biodiversity and evolutionary origins. Antarctic microbial ecosystems provide useful models for general questions in evolutionary ecology given the relative isolation of the South Polar Region, the severe biological constraints imposed by the polar environment, and the absence of higher plants and animals in some Antarctic habitats. Sealed environments such as Lake Vostok and the overlying East Antarctic ice sheet provide unique, natural culture collec

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Tyurin, E. A., M. V. Khramov, and I. A. Dyatlov. "Analysis of Implementation of the Requirements for Provision of Biological Safety at a Potentially Hazardous Facility." Problems of Particularly Dangerous Infections, no. 2 (July 4, 2018): 95–100. http://dx.doi.org/10.21055/0370-1069-2018-2-95-100.

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Discussed are the problems of implementation of requirements for the provision of biological safety at a potentially hazardous biological facility by the example of Federal Budgetary Institution of Science “State Scientific Center of Applied Microbiology and Biotechnology” of the Rospotrebnadzor. Identified are the necessary and sufficient organizational-andpreventive and control measures and procedures on management of works with microorganisms of the I-IV groups of pathogenicity (hazard) in isolated labs of the Center. Issues associated with exploitation of biological safety engineering syst

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Pylyak, N. V., and L. L. Loban. "A COLLECTION OF INDUSTRIALLY VALUABLE CULTURES OF MICROORGANISMS FOR AGRICULTURAL BIOLOGY." Microbiology&Biotechnology, no. 3(59) (December 20, 2023): 60–66. http://dx.doi.org/10.18524/2307-4663.2023.3(59).286968.

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The Engineering and Technological Institute "Biotechnic" of the National Academy of Sciences of Ukraine has collected and preserve the viable collection of microorganisms, which was formed on the basis of expediency and efficiency in the biologization of agriculture. The microbial gene pool of the Collection bacterial and fungal strains of microorganisms that are used in biotechnologies for the production of plant protection products and their quality control. Microbiopreparations with fungicidal, entomocidal, phosphate-mobilizing, nematicidal, cellulolytic, and growth-stimulating properties h

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Tripathy, Anchal, Debasis Dash, and Chandi Charan Rath. "Plant Growth Promotion and In-vitro Bio-activities Evaluation of Endophytic Fungal Communities Associated with Oryza sativa L." Ecology, Environment and Conservation 29, no. 02 (2023): 793–801. http://dx.doi.org/10.53550/eec.2023.v29i02.042.

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Utilization of plant-associated beneficial microorganisms, particularly endophytes, is growing, as they occupy a relatively privileged niche within various plant tissues, where they face less competition for food and shelter than in the rhizo-sphere. The plant and these beneficent endophytes form a harmonious interaction that has profound effects on the host plant’s physiological and developmental process in its native habitat. The purpose of this study aims to emphasize the endophytic fungi found on flourishing rice seedlings as well as to investigate the preordained factors affecting the gro

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Chapartegui-González, Itziar, María Lázaro-Díez, and José Ramos-Vivas. "Genetic Resistance Determinants in Clinical Acinetobacter pittii Genomes." Antibiotics 11, no. 5 (2022): 676. http://dx.doi.org/10.3390/antibiotics11050676.

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Antimicrobial-resistant pathogenic bacteria are an increasing problem in public health, especially in the healthcare environment, where nosocomial infection microorganisms find their niche. Among these bacteria, the genus Acinetobacter which belongs to the ESKAPE pathogenic group harbors different multi-drug resistant (MDR) species that cause human nosocomial infections. Although A. baumannii has always attracted more interest, the close-related species A. pittii is the object of more study due to the increase in its isolation and MDR strains. In this work, we present the genomic analysis of f

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Ahern, H. E., K. A. Walsh, T. C. J. Hill, and B. F. Moffett. "Ice-nucleation negative fluorescent pseudomonads isolated from Hebridean cloud and rain water produce biosurfactants." Biogeosciences Discussions 3, no. 5 (2006): 1561–86. http://dx.doi.org/10.5194/bgd-3-1561-2006.

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Abstract. Microorganisms were discovered in clouds over 100 years ago but information on bacterial community structure and function is limited. Clouds may not only be a niche within which bacteria could thrive but they might also influence dynamic processes using ice nucleating and cloud condensing abilities. Cloud and rain samples were collected from two mountains in the Outer Hebrides, NW Scotland, UK. Community composition was determined using a combination of amplified 16S ribosomal DNA restriction analysis and sequencing. 256 clones yielded 100 operational taxonomic units (OTUs) of which

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Gashe, Fanta, Eshetu Mulisa, Mekidim Mekonnen, and Gemechu Zeleke. "Antimicrobial Resistance Profile of Different Clinical Isolates against Third-Generation Cephalosporins." Journal of Pharmaceutics 2018 (September 9, 2018): 1–7. http://dx.doi.org/10.1155/2018/5070742.

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Background. Drug resistant microorganisms lead to an increase in morbidity and mortality as they boost the risk of inappropriate therapy. Hence, data on antimicrobial resistance help define the best possible treatment for individual patients. Therefore, this study aimed to screen the antimicrobial resistant profile of 3rd generation cephalosporin drugs in Jimma University Specialized Teaching Hospital. Methods. A hospital based prospective cross-sectional study was conducted in Jimma University Specialized Hospital (JUSH) from April to August 2016. The clinical samples such as wound swab, urin

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Ferreira, Priscila Vitor Alves, Isabela Amêndola, Luciane Dias de Oliveira, Célia Regina Gonçalves e. Silva, Mariella Vieira Pereira Leão, and Silvana Soléo Ferreira dos Santos. "Prevalence and Sensitivity of Bacilli and Pseudomonas in the Newborn’s Oral Cavity." Brazilian Dental Journal 28, no. 4 (2017): 423–27. http://dx.doi.org/10.1590/0103-6440201601205.

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Abstract The aim of this study was to isolate Enterobacteria and Pseudomonas from the oral cavity of hospitalized newborns (NB) and determine their prevalence and the sensitivity profile to most commonly used antibiotics for this age group. Samples from the oral cavity of NB from 24 to 48 h age were collected using swabs. The samples were inoculated on MacConkey agar, incubated and the colonies counted and identified. For each strain, the minimum inhibitory concentration (MIC) was determined using agar dilution test. Tests for enterobacteria producing extended spectrumβ-lactamases (ESBL) were

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Douglas, M. R., M. A. Davis, M. Amarello, et al. "Anthropogenic impacts drive niche and conservation metrics of a cryptic rattlesnake on the Colorado Plateau of western North America." Royal Society Open Science 3, no. 4 (2016): 160047. http://dx.doi.org/10.1098/rsos.160047.

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Ecosystems transition quickly in the Anthropocene, whereas biodiversity adapts more slowly. Here we simulated a shifting woodland ecosystem on the Colorado Plateau of western North America by using as its proxy over space and time the fundamental niche of the Arizona black rattlesnake ( Crotalus cerberus ). We found an expansive (= end-of-Pleistocene) range that contracted sharply (= present), but is blocked topographically by Grand Canyon/Colorado River as it shifts predictably northwestward under moderate climate change (= 2080). Vulnerability to contemporary wildfire was quantified from ava

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Tan, Lik Tong, and Nurul Farhana Salleh. "Marine Cyanobacteria: A Rich Source of Structurally Unique Anti-Infectives for Drug Development." Molecules 29, no. 22 (2024): 5307. http://dx.doi.org/10.3390/molecules29225307.

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Marine cyanobacteria represent a promising yet underexplored source of novel natural products with potent biological activities. Historically, the focus has been on isolating cytotoxic compounds from marine cyanobacteria, but a substantial number of these photosynthetic microorganisms also produce diverse specialized molecules with significant anti-infective properties. Given the global pressing need for new anti-infective lead compounds, this review provides a concise yet comprehensive overview of the current knowledge on anti-infective secondary metabolites derived from marine cyanobacteria.

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Poudel, Purna Bahadur, Dipesh Dhakal, Rubin Thapa Magar, Niranjan Parajuli, and Jae Kyung Sohng. "Genome Mining and Genetic Manipulation Reveal New Isofuranonaphthoquinones in Nocardia Species." International Journal of Molecular Sciences 25, no. 16 (2024): 8847. http://dx.doi.org/10.3390/ijms25168847.

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The identification of specialized metabolites isolated from microorganisms is urgently needed to determine their roles in treating cancer and controlling multidrug-resistant pathogens. Naphthoquinones act as anticancer agents in various types of cancers, but some toxicity indicators have been limited in their appropriate application. In this context, new isofuranonaphthoquinones (ifnq) that are less toxic to humans could be promising lead compounds for developing anticancer drugs. The aim of this study is to identify and characterize novel furanonaphthoquinones (fnqs) from Nocardia sp. CS682 a

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Mai, Phuong-Y., Géraldine Le Goff, Erwan Poupon, et al. "Solid-Phase Extraction Embedded Dialysis (SPEED), an Innovative Procedure for the Investigation of Microbial Specialized Metabolites." Marine Drugs 19, no. 7 (2021): 371. http://dx.doi.org/10.3390/md19070371.

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Solid-phase extraction embedded dialysis (SPEED technology) is an innovative procedure developed to physically separate in-situ, during the cultivation, the mycelium of filament forming microorganisms, such as actinomycetes and fungi, and the XAD-16 resin used to trap the secreted specialized metabolites. SPEED consists of an external nylon cloth and an internal dialysis tube containing the XAD resin. The dialysis barrier selects the molecular weight of the trapped compounds, and prevents the aggregation of biomass or macromolecules on the XAD beads. The external nylon promotes the formation o

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Han, Tianxiao, Rajesh D. Gunage, Ran Jing, et al. "In Vivo Reprogramming of Adult Liver Sinusoidal Vascular Endothelial Cells into a Hematopoietic Stem and Progenitor Cell Niche." Blood 142, Supplement 1 (2023): 4071. http://dx.doi.org/10.1182/blood-2023-180300.

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Hematopoietic stem and progenitor cells (HSPCs) reside in specialized microenvironments known as the HSPC niche. Vascular endothelial cells (ECs) are one of the most abundant and significant components of the niche, providing known supportive factors such as E-selectin, CXCL12, and SCF. During marrow stress, extramedullary hematopoiesis can occur in the liver or spleen, but the process is inefficient. The sinusoidal vessels of the liver share many similarities with marrow sinusoids. Here, we aim to identify the transcription factor (TF) code that specifies the vascular EC fate in HSPC marrow n

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Amiri Moghaddam, Jamshid, Antonio Dávila-Céspedes, Mohammad Alanjary, Jochen Blom, Gabriele König, and Till Schäberle. "Genome Analysis of the Marine Bacterium Labrenzia sp. Strain 011, a Potential Protective Agent of Mollusks." Data 4, no. 1 (2019): 33. http://dx.doi.org/10.3390/data4010033.

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The marine bacterium Labrenzia sp. strain 011 was isolated from the coastal sediment of Kronsgaard, Germany. The Labrenzia species are suggested to be protective agents of mollusks. Labrenzia sp. strain 011 produces specialized metabolites, which showed activity against a range of microorganisms, thereunder strong inhibitory effects against Pseudoroseovarius crassostreae DSM 16,950 (genus Roseovarius), the causative agent of oyster disease. The genome of Labrenzia sp. strain 011 was sequenced and assembled into 65 contigs, has a size of 5.1 Mbp, and a G+C content of 61.6%. A comparative genome

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