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Journal articles on the topic 'Red algae - Morphology'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Kunpeng, FANG, NAN Fangru, FENG Jia, LV Junping, LIU Qi, and XIE Shulian. "Morphology and molecular phylogeny of a freshwater red algae." Journal of Lake Sciences 31, no. 1 (2019): 220–35. http://dx.doi.org/10.18307/2019.0121.

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2

Dvir, Irit, Reuven Chayoth, Uriel Sod-Moriah, et al. "Soluble polysaccharide and biomass of red microalgaPorphyridiumsp. alter intestinal morphology and reduce serum cholesterol in rats." British Journal of Nutrition 84, no. 4 (2000): 469–76. http://dx.doi.org/10.1017/s000711450000177x.

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The present study investigated the effects of the red microalgaPorphyridiumsp. on gastrointestinal physiology and lipid metabolism in male Sprague-Dawley rats. Diets containing dietary fibre from pelleted red microalgal cells (biomass) or their sulfated polysaccharide, pectin or cellulose (control) were fed to rats for a period of 30 d. All three fibre-supplemented diets increased the length of both the small intestine and colon, with a significantly greater effect in rats fed the algal polysaccharide. The polysaccharide also increased mucosa and muscularis cross-sectional area of the jejunum,

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3

Maschmann, Sascha, Karin Ruban, Johanna Wientapper, and Wilhelm J. Walter. "Phototaxis of the Unicellular Red Alga Cyanidioschyzon merolae Is Mediated by Novel Actin-Driven Tentacles." International Journal of Molecular Sciences 21, no. 17 (2020): 6209. http://dx.doi.org/10.3390/ijms21176209.

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Phototaxis, which is the ability to move towards or away from a light source autonomously, is a common mechanism of unicellular algae. It evolved multiple times independently in different plant lineages. As of yet, algal phototaxis has been linked mainly to the presence of cilia, the only known locomotive organelle in unicellular algae. Red algae (Rhodophyta), however, lack cilia in all stages of their life cycle. Remarkably, multiple unicellular red algae like the extremophile Cyanidioschyzon merolae (C. merolae) can move towards light. Remarkably, it has remained unclear how C. merolae achie

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4

Lee, Jung-Joon, Sung-Hyun Jang, Joo-Heon Lee, and Jung-Ho Lee. "Morphology and Ecology of Peridinium bipes var. occultatum Lindem.(Dinophyceae) Forming Freshwater Red Tides in Korean Dam Reservoirs." ALGAE 21, no. 4 (2006): 433–43. http://dx.doi.org/10.4490/algae.2006.21.4.433.

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5

Dudgeon, SR, JE Kiibler, RL Vadas, and IR Davison. "Physiological responses to environmental variation in intertidal red algae: does thallus morphology matter?" Marine Ecology Progress Series 117 (1995): 193–206. http://dx.doi.org/10.3354/meps117193.

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6

Adams, Luther A., Gavin W. Maneveldt, Andrew Green, et al. "Rhodolith Bed Discovered off the South African Coast." Diversity 12, no. 4 (2020): 125. http://dx.doi.org/10.3390/d12040125.

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Rhodolith beds have not previously been recorded in South Africa. A multidisciplinary research effort used remote sampling tools to survey the historically unexplored continental shelf off the Eastern Cape coast of South Africa. A rhodolith bed, bearing both living and dead non-geniculate coralline red algae, was discovered in the 30–65 m depth range off the Kei River mouth in the newly proclaimed Amathole Offshore Marine Protected Area. Some of the rhodolith forming coralline algal specimens were identified as belonging to at least three genera based on their morphology and anatomy, namely, L

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7

Asih, Triana, Muhammad Khayuridlo, Rasuane Noor, and Muhfahroyin Muhfahroyin. "Biodiversity and Potential Use of Macro Algae in Pesisir Barat Lampung." Biosaintifika: Journal of Biology & Biology Education 11, no. 1 (2019): 100–107. http://dx.doi.org/10.15294/biosaintifika.v11i1.16532.

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Pesisir Barat Regency in Lampung has abundant marine biological wealth that has not been widely known and utilized by the community, one of them is macro algae. The objectives of the research were to identify the types of macro algae and to explains the potential use of macro algae in the Pesisir Barat Lampung Region. The study used cruise method. The findings were identified by experts to validate the results of classification, morphology, and qualitative studies regarding the potential use and benefits of macro algae. From the results of this study, 15 species of macro algae were found on Ta

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Price, Dana C., Ursula W. Goodenough, Robyn Roth, et al. "Analysis of an improved Cyanophora paradoxa genome assembly." DNA Research 26, no. 4 (2019): 287–99. http://dx.doi.org/10.1093/dnares/dsz009.

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Abstract Glaucophyta are members of the Archaeplastida, the founding group of photosynthetic eukaryotes that also includes red algae (Rhodophyta), green algae, and plants (Viridiplantae). Here we present a high-quality assembly, built using long-read sequences, of the ca. 100 Mb nuclear genome of the model glaucophyte Cyanophora paradoxa. We also conducted a quick-freeze deep-etch electron microscopy (QFDEEM) analysis of C. paradoxa cells to investigate glaucophyte morphology in comparison to other organisms. Using the genome data, we generated a resolved 115-taxon eukaryotic tree of life that

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Simic, Snezana, and Nevena Djordjevic. "Morphology, distribution and ecology of the freshwater red algae Paralemanea (Batrachospermaceae, Batrachospermales, Rhodophyta) in Serbia." Archives of Biological Sciences 69, no. 1 (2017): 167–74. http://dx.doi.org/10.2298/abs160211093s.

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This paper describes the morphology, distribution and ecology of 15 populations of Paralemanea collected from 2004 to 2011 in 12 rivers in Serbia. On the basis of morphological and reproductive characteristics, two species were identified: P. annulata (12 populations) and P. catenata (3 populations). Morphological (presence of a stalk, thalli length, nodal diameter (ND), internodal diameter (ID), node and internode diameter ratio (ND:ID) and reproductive (arrangement of spermatangial sori, length and diameter of carpospores, presence of Chantransia stage) features described in the literature a

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10

Auer, Gerald, and Werner E. Piller. "Nanocrystals as phenotypic expression of genotypes—An example in coralline red algae." Science Advances 6, no. 7 (2020): eaay2126. http://dx.doi.org/10.1126/sciadv.aay2126.

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Coralline red algae (CRA) are important ecosystem engineers in the world’s oceans. They play key roles as primary food source and carbonate producers in marine habitats. CRA are also vital for modern reef systems where they act as substrate for coral growth and stabilizers of reef frameworks. However, morphotaxonomic identification of these important marine organisms is hampered by the fact that morphological concepts used for their classification do not correspond to molecular data. We present the first analysis of nanoscale features in calcified cell walls of CRA in a globally distributed sa

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11

Buaya, A. T., B. Scholz, and M. Thines. "Sirolpidium bryopsidis, a parasite of green algae, is probably conspecific with Pontisma lagenidioides, a parasite of red algae." Fungal Systematics and Evolution 7, no. 1 (2021): 223–31. http://dx.doi.org/10.3114/fuse.2021.07.11.

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The genus Sirolpidium (Sirolpidiaceae) of the Oomycota includes several species of holocarpic obligate aquatic parasites. These organisms are widely occurring in marine and freshwater habitats, mostly infecting filamentous green algae. Presently, all species are only known from their morphology and descriptive life cycle traits. None of the seven species classified in Sirolpidium, including the type species, S. bryopsidis, has been rediscovered and studied for their molecular phylogeny, so far. Originally, the genus was established to accommodate all parasites of filamentous marine green algae

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12

Hernandez Kantun, Jazmin J., Rafael Riosmena-Rodriguez, Walter H. Adey, and Fabio Rindi. "Analysis of the cox2-3 spacer region for population diversity and taxonomic implications in rhodolith-forming species (Rhodophyta: Corallinales)." Phytotaxa 190, no. 1 (2014): 331. http://dx.doi.org/10.11646/phytotaxa.190.1.20.

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Coralline red algae demonstrate phenotypic plasticity related to environmental factors, rendering their identification difficult. The cox2-3 spacer is a mitochondrial marker widely used for phylogeographic studies and discrimination between closely related species in red algae; however, cox2-3 spacer sequence data for coralline algae are still limited. In this study we substantially increase the number of cox2-3 spacer sequences available for coralline algae, exploring their usefulness for different types of molecular investigations in coralline algae (DNA barcoding and phylogeography), with e

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Zalewska, Tamara, and Michał Saniewski. "Bioaccumulation of 137Cs by benthic plants and macroinvertebrates." Oceanological and Hydrobiological Studies 40, no. 3 (2011): 1–8. http://dx.doi.org/10.2478/s13545-011-0023-6.

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Abstract137Cs activity concentrations were determined in macrophytes and macrozoobenthic organisms from the southern Baltic Sea. Cesium isotope content was analysed in macroalgae species (green, red and brown algae representatives) and in some species of vascular plants. The analyzed macroinvertebrate organisms included bivalves and a crustacean.Concentration factors (CF) were calculated using the determined 137Cs concentration in the flora and fauna organisms against that in seawater, and the bioaccumulative properties were compared. The study pointed out that the most important factors in th

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14

Renfrew, Dawn E., Paul W. Gabrielson, and Robert F. Scagel. "The marine algae of British Columbia, northern Washington, and southeast Alaska: division Rhodophyta (red algae), class Rhodophyceae, order Gelidiales." Canadian Journal of Botany 67, no. 11 (1989): 3295–314. http://dx.doi.org/10.1139/b89-406.

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The red algal order Gelidiales is represented in the benthic marine algal flora of British Columbia, northern Washington, and southeast Alaska by two genera, Gelidium Lamouroux and Pterocladia J. Agardh. Three species of Gelidium are present, G. coulteri Harvey, G. purpurascens Gardner, and G. vagum Okamura, and one species of Pterocladia, P. caloglossoides (Howe) Dawson. For each species we provide a description of its habit and life history, vegetative and reproductive morphology, and habitat and seasonality. Distributions and representative specimens examined are given. Keys are provided to

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15

Chiovitti, Anthony, Gerald T. Kraft, Antony Bacic, and Ming-Long Liao. "Review: Gelling polysaccharides from Australian seaweeds: research and potential." Marine and Freshwater Research 52, no. 7 (2001): 917. http://dx.doi.org/10.1071/mf01028.

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This review briefly characterizes the major Australian seaweed groups that elaborate gelling non-fibrillar wall components; it surveys the research, mostly conducted in the past decade, into the structure and potential applications of their polysaccharides. Recent emphasis has been placed on the chemistry of red-algal galactans, which has provided a chemotaxonomic data set against which hypotheses of algal taxonomy and phylogeny derived from classical morphology can be tested. Although there are ongoing environmental and economic impediments to the establishment of seaweed-based industries in

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16

Sonani, Ravi Raghav, Mahima Sharma, Gagan Deep Gupta, Vinay Kumar, and Datta Madamwar. "Phormidiumphycoerythrin forms hexamers in crystals: a crystallographic study." Acta Crystallographica Section F Structural Biology Communications 71, no. 8 (2015): 998–1004. http://dx.doi.org/10.1107/s2053230x15010134.

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The crystallographic analysis of a marine cyanobacterium (Phormidiumsp. A09DM) phycoerythrin (PE) that shows distinct sequence features compared with known PE structures from cyanobacteria and red algae is reported.PhormidiumPE was crystallized using the sitting-drop vapour-diffusion method with ammonium sulfate as a precipitant. Diffraction data were collected on the protein crystallography beamline at the Indus-2 synchrotron. The crystals diffracted to about 2.1 Å resolution at 100 K. The crystals, with an apparent hexagonal morphology, belonged to space groupP1, with unit-cell parametersa=

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17

Grant, S. W. F., A. H. Knoll, and G. J. B. Germs. "Probable calcified metaphytes in the latest Proterozoic Nama Group, Namibia: origin, diagenesis, and implications." Journal of Paleontology 65, no. 1 (1991): 1–18. http://dx.doi.org/10.1017/s002233600002014x.

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Samples from the Huns Limestone Member, Urusis Formation, Nama Group, at two adjacent localities in southern Namibia contain thin foliose to arched, sheet-like carbonate crusts that are 100–500 µm thick and up to 5 cm in lateral dimension. Morphologic, petrographic, and geochemical evidence supports the interpretation of these delicate crusts as biogenic, most likely the remains of calcified encrusting metaphytes. The original sediments of the fossiliferous samples contained aragonitic encrusting algae, botryoidal aragonite cements, and an aragonite mud groundmass. Spherulites within the precu

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18

Pueschel, Curt M. "Rod-shaped virus-like particles in the endoplasmic reticulum ofAudouinella saviana(Acrochaetiales, Rhodophyta)." Canadian Journal of Botany 73, no. 12 (1995): 1974–80. http://dx.doi.org/10.1139/b95-211.

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Rod-shaped particles, approximately 30 nm in width and 1000 nm or more in length, were found in cells of the red alga Audouinella saviana (Meneghini) Woelkerling. Parallel in orientation and hexagonally packed, these inclusions were located within dilated cisternae of rough endoplasmic reticulum. The rods consisted of an electron-dense central element surrounded by a thick-walled tube that appeared to be composed of repeating granular subunits. Although uninfected controls of the same species were not available, the morphology and substructure of the inclusions, the absence of such inclusions

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19

Bucur, Ioan I., Wolfang Kiessling, and Roberto A. Scasso. "Re-description and neotypification of Archamphiroa jurassica Steinmann 1930, a calcareous red alga from the Jurassic of Argentina." Journal of Paleontology 83, no. 6 (2009): 962–68. http://dx.doi.org/10.1666/09-052.1.

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Archamphiroa jurassica was described by Steinmann (1930) from carbonate deposits of the Cordillera de los Andes in Mendoza, central Argentina (Arroyo Negro, confluent of Malargüe River), assigned to the Callovian stage. Based on the general morphology and the internal structure of the identified fragments, Steinmann considered them to belong to the coralline algae. Comparisons made with some fossil and extant corallines species led him to the conclusion that Archamphiroa jurassica closely resembles some species of the extant genus Amphiroa.

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20

LoDuca, Steven T., Jean-Bernard Caron, James D. Schiffbauer, Shuhai Xiao, and Anthony Kramer. "A reexamination of Yuknessia from the Cambrian of British Columbia and Utah." Journal of Paleontology 89, no. 1 (2015): 82–95. http://dx.doi.org/10.1017/jpa.2014.7.

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AbstractTo investigate the phylogenetic affinity of Yuknessia simplex Walcott, 1919, scanning electron microscopy was applied to the Burgess Shale (Cambrian Series 3, Stage 5) type material and to new material from the Trilobite Beds (Yoho National Park) and specimens from the Cambrian of Utah. On the basis of fine-scale details observed using this approach, including banding structure interpreted as fusellae, Yuknessia Walcott, 1919 is transferred from the algae, where it resided for nearly a century, to the extant taxon Pterobranchia (Phylum Hemichordata). Considered as such, Yuknessia speci

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Saunders, Gary W. "Applying DNA barcoding to red macroalgae: a preliminary appraisal holds promise for future applications." Philosophical Transactions of the Royal Society B: Biological Sciences 360, no. 1462 (2005): 1879–88. http://dx.doi.org/10.1098/rstb.2005.1719.

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Marine macroalgae, especially the Rhodophyta, can be notoriously difficult to identify owing to their relatively simple morphology and anatomy, convergence, rampant phenotypic plasticity, and alternation of heteromorphic generations. It is thus not surprising that algal systematists have come to rely heavily on genetic tools for molecular assisted alpha taxonomy. Unfortunately the number of suitable marker systems in the three available genomes is enormous and, although most workers have settled on one of three or four models, the lack of an accepted standard hinders the comparison of results

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22

Gabrielson, Paul W., and Robert F. Scagel. "The marine algae of British Columbia, northern Washington, and southeast Alaska: division Rhodophyta (red algae), class Rhodophyceae, order Gigartinales, families Caulacanthaceae and Plocamiaceae." Canadian Journal of Botany 67, no. 4 (1989): 1221–34. http://dx.doi.org/10.1139/b89-160.

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This is a floristic treatment of the gigartinalean families Caulacanthaceae and Plocamiaceae that occur in southeast Alaska, British Columbia, and northern Washington. Caulacanthaceae is represented by one genus, Caulacanthus Kützing, and one species, the type, C. ustulatus (Mertens ex Turner) Kützing, whereas Plocamiaceae is represented by two genera, Plocamiocolax Setchell, including the type species, P. pulvinata Setchell, and Plocamium Lamouroux, including three species, P. cartilagineum (L.) Dixon, P. oregonum Doty, and P. violaceum Farlow. For each species, we provide a description of it

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23

GANESAN, E. K., JOHN A. WEST, and ORLANDO NECCHI JR. "A catalogue and bibliography of non-marine (freshwater and estuarine) Rhodophyta (red algae) of India." Phytotaxa 364, no. 1 (2018): 1. http://dx.doi.org/10.11646/phytotaxa.364.1.1.

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An annotated bibliographic catalogue of Indian red algae (Rhodophyta) occurring in freshwater and estuarine habitats (moist terrestrial soils, ponds, streams, rivers, lakes, large inland brackish water lagoons and coastal estuaries), based on more than a century (1846 to 2017) of publications is presented in a single coherent work for the first time. There have been 81 taxonomic entities (species, varieties and doubtful records), distributed among 21 genera recorded for the vast Indian sub-continent. Species distribution among the 21 genera are as follows: Audouinella—12; Balliopsis—1; Batrach

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24

Yokoya, N. S. "Effects Of Salinity On The Growth Rate, Morphology And Water Content Of Some Brazilian Red Algae Of Economic Importance." Ciencias Marinas 18, no. 2 (1992): 49–64. http://dx.doi.org/10.7773/cm.v18i2.893.

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25

Voskoboinikov, G. M., V. N. Маkarov, S. V. Malavenda, et al. "ADAPTATION, REGULATION OF GROWTH AND REPRODUCTION AND RATIONAL USE OF ALGAE-MACROPHYTES OF THE BARENTS SEA." Transaction of the Kola Science Centre 11, no. 4 (2020): 150–78. http://dx.doi.org/10.37614/2307-5252.2020.11.4.007.

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The results of algological researches of the Murmansk Marine Biological Institute for the period from 2015 till 2019 are presented with the following achievements. Analysis of the expeditionary samples revealed 79 species of algae macrophyte, rarely found at the Murman coast, among them 10 species were Chlorophyta, 33 –Phaeophyceae, 36 –Rhodophyta. A significant increase of the occurrence (presence) of Ulva lactuca L.at the Murmansk coast of the Barents Sea in 2009–2019 was noted, due to positive climatic anomalies caused by an increase of the influx of the Atlantic waters. It has been shown f

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Vona, Danilo, Marco Lo Presti, Stefania Roberta Cicco, Fabio Palumbo, Roberta Ragni та Gianluca Maria Farinola. "Light emitting silica nanostructures by surface functionalization of diatom algae shells with a triethoxysilane-functionalized π-conjugated fluorophore". MRS Advances 1, № 57 (2015): 3817–23. http://dx.doi.org/10.1557/adv.2015.21.

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ABSTRACTThe functionalization of biosilica shells (frustules) of diatoms microalgae with a tailored luminescent molecule is a convenient, scalable and biotechnological approach for obtaining new light emitting silica nanostructures with promising applications in photonics. In particular, here we report the synthesis of a red emitting organic fluorophore and its covalent linking to the surface of mesoporous biosilica extracted from Thalassiosira weissflogii diatoms cultured in our laboratories. The organic dye has a conjugated skeleton composed of thienyl, benzothiadiazolyl and phenyl units and

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Carro, Belén, Lua Lopez, Viviana Peña, Ignacio Bárbara, and Rodolfo Barreiro. "DNA barcoding allows the accurate assessment of European maerl diversity: a Proof-of-Concept study." Phytotaxa 190, no. 1 (2014): 176. http://dx.doi.org/10.11646/phytotaxa.190.1.12.

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Two non-geniculate coralline red algae (Lithothamnion corallioides and Phymatolithon calcareum) are partially protected under the assumption that they are the main components of maerl beds in Atlantic Europe. However, what we know about the composition of maerl relies mainly on morphology-based identifications that are notoriously difficult due to a lack of diagnostic features, convergence, and widespread phenotypic plasticity. Now, this state of affairs can be improved with new alternatives that, unlike morphology, allow the unambiguous partition of a large number of rhodoliths into species r

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Burdett, Heidi L., Elena Aloisio, Piero Calosi, et al. "The effect of chronic and acute low pH on the intracellular DMSP production and epithelial cell morphology of red coralline algae." Marine Biology Research 8, no. 8 (2012): 756–63. http://dx.doi.org/10.1080/17451000.2012.676189.

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29

HAN, JIN-FEN, FANG-RU NAN, JIA FENG, et al. "Sheathia jinchengensis (Batrachospermales, Rhodophyta), a new freshwater red algal species described from North China." Phytotaxa 367, no. 1 (2018): 63. http://dx.doi.org/10.11646/phytotaxa.367.1.7.

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A new species of freshwater red algae, Sheathia jinchengensis, is described based on material collected from rocks in a clean and cold-water stream from the Jincheng region of Shanxi province in North China. Molecular sequences of rbcL and psbA genes were used to evaluate the phylogenetic relationship among samples of S. jinchengensis and other Sheathia species from several regions of the world. The results showed that S. jinchengensis formed an independent branch and separated from the previously published sequence data of other Sheathia taxa. From a morphological point of view, this new spec

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Mayerson, P. L., and M. O. Hall. "Rat retinal pigment epithelial cells show specificity of phagocytosis in vitro." Journal of Cell Biology 103, no. 1 (1986): 299–308. http://dx.doi.org/10.1083/jcb.103.1.299.

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The retinal pigment epithelial (RPE) cell of the eye normally phagocytozes only retinal rod outer segments (ROS). The specificity of this phagocytic process was examined by incubating RPE cells with a variety of particle types. Confluent RPE cell cultures were incubated for 3 h at 37 degrees C in the presence of rat ROS, rat red blood cells (RBC), algae, bacteria, or yeast. Other cell cultures were incubated with equal numbers of ROS and one other particle type. Quantitative scanning electron microscopy was used to determine the numbers and morphology of particles bound to RPE cells, while dou

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Rugnini, Lorenza, Catia Rossi, Simonetta Antonaroli, Arnold Rakaj, and Laura Bruno. "The Influence of Light and Nutrient Starvation on Morphology, Biomass and Lipid Content in Seven Strains of Green Microalgae as a Source of Biodiesel." Microorganisms 8, no. 8 (2020): 1254. http://dx.doi.org/10.3390/microorganisms8081254.

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The development of clean and renewable energy sources is currently one of the most important challenges facing the world. Although research interests in algae-based energy have been increasing in the last decade, only a small percentage of the bewildering diversity exhibited by microalgae has been investigated for biodiesel production. In this work, seven strains of green microalgae belonging to the genera Scenedesmus, Tetradesmus and Desmodesmus were grown in liquid medium with or without a nitrogen (N) source—at two different irradiances (120 ± 20 and 200 ± 20 μmol photons m−2 s−1)—to evalua

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32

Buaya, A. T., and M. Thines. "Bolbea parasitica gen. et sp. nov., a cultivable holocarpic parasitoid of the early-diverging Saprolegniomycetes." Fungal Systematics and Evolution 6, no. 1 (2020): 129–37. http://dx.doi.org/10.3114/fuse.2020.06.07.

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Holocarpic oomycetes convert their entire cytoplasm into zoospores and thus do not form dedicated sporangia or hyphal compartments for asexual reproduction. The majority of holocarpic oomycetes are obligate parasites and parasitoids of a diverse suite of organisms, among them green and red algae, brown seaweeds, diatoms, fungi, oomycetes and invertebrates. Most of them are found among the early diverging oomycetes or the Peronosporomycetes, and some in the early-diverging Saprolegniomycetes (Leptomitales). The obligate parasitism renders it difficult to study some of these organisms. Only a fe

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Remias, Daniel, Hans Wastian, Cornelius Lütz, and Thomas Leya. "Insights into the biology and phylogeny of Chloromonas polyptera (Chlorophyta), an alga causing orange snow in Maritime Antarctica." Antarctic Science 25, no. 5 (2013): 648–56. http://dx.doi.org/10.1017/s0954102013000060.

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AbstractIn Antarctica, mass accumulations of psychrophilic algae cause striking phenomena like green, orange, or red snow. This occurs during summer, when coastal snowfields start to melt, become waterlogged and photoautotrophs can thrive. Chloromonas polyptera (Fritsch) Hoham, Mullet & Roemer is a unicellular species that causes orange snow in the vicinity of penguin rockeries. It has been recognized for many decades because of the distinct habitat and the characteristic morphology of cysts with elongated flanges on the outer cell wall. However, closer investigations concerning the ecolog

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Adão, Pedro, João Reboleira, Marco Teles, et al. "Enhancement of the Antioxidant and Antimicrobial Activities of Porphyran through Chemical Modification with Tyrosine Derivatives." Molecules 26, no. 10 (2021): 2916. http://dx.doi.org/10.3390/molecules26102916.

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The chemical modification of porphyran hydrocolloid is attempted, with the objective of enhancing its antioxidant and antimicrobial activities. Sulfated galactan porphyran is obtained from commercial samples of the red algae Porphyra dioica using Soxhlet extraction with water at 100 °C and precipitation with isopropyl alcohol. The extracted porphyran is then treated with modified L-tyrosines in aqueous medium in the presence of NaOH, at ca. 70 °C. The modified tyrosines L1 and L2 are prepared through a Mannich reaction with either thymol or 2,4-di-tert-butylphenol, respectively. While the reac

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Pentecost, Allan, Brian A. Whitton, and Christopher F. Carter. "Ecology and morphology of the freshwater red alga Chroothece in the British Isles." Algological Studies 143, no. 1 (2013): 51–63. http://dx.doi.org/10.1127/1864-1318/2013/0137.

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Chen, Jin Yi, Jing Li, Nian Li, Xing Yuan Yu, Qin Feng Jiang, and Jia Xu Hu. "Study on the Removal of Algae with Hexadecyl Trimethyl Ammonium Bromide (CTAB) Modified Rectorite." Advanced Materials Research 557-559 (July 2012): 1013–17. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.1013.

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Natural Ca-rectorite (Ca-REC) is modified with hexadecyl trimethyl ammonium bromide (CTAB) to get CTAB-rectorite (CT-REC). XRD and SEM analytical method were used to study the change of rectorite in external morphology and internal structure. The results showed that the layer structure of CT-REC was looser and the basal spacing was obviously bigger than Ca-REC. The ability of RECs in removing microcystis aeruginosa (M. aeruginosa) was investigated through long-term and short-term study. The results of short-term study showed that compared with Ca-REC removing 10% of the algae at the concentrat

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Ratnawati, Pustika, Nova F. Simatupang, Petrus R. Pong-Masak, Nicholas A. Paul, and Giuseppe C. Zuccarello. "Genetic Diversity Analysis of Cultivated Kappaphycus in Indonesian Seaweed Farms using COI Gene." Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology 15, no. 2 (2020): 65. http://dx.doi.org/10.15578/squalen.v15i2.466.

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Indonesia is a major player in the aquaculture of red algae, especially carrageenan producing ‘eucheumatoids’ such as Kappaphycus and Eucheuma. However, many current trade names do not reflect the evolutionary species and updated taxonomy, this is especially the case for eucheumatoid seaweeds that are highly variable in morphology and pigmentation. Genetic variation is also not known for the cultivated eucheumatoids in Indonesia. Therefore, this study aimed to determine the species and the level of genetic variation within species of cultivated eucheumatoids from various farms across Indonesia

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HAN, JIN-FEN, FANG-RU NAN, JIA FENG, et al. "Affinities of four freshwater putative “Chantransia” stages (Rhodophyta) in Southern China from molecular and morphological data." Phytotaxa 441, no. 1 (2020): 47–59. http://dx.doi.org/10.11646/phytotaxa.441.1.4.

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Four putative “Chantransia” isolates were collected from four locations in Hubei and Yunnan Provinces, China. Morphological analyses were conducted on all isolates. Two specimens (HB26 and YN2) fit the morphological description of A. pygmaea, while the other two isolates (YN1 and YN3) varied in morphology, but were within the circumscription of Audouinella hermannii. Due to the fact that the morphological characters of the “Chantransia” stages of order Batrachospermales and the species of genus Audouinella are too similar to be distinguished, a molecular analysis was performed to clarify the p

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WATSON, CHARLOTTE, EKIN TILIC, and GREG W. ROUSE. "Revision of Hyalopale (Chrysopetalidae; Phyllodocida; Annelida): an amphi-Atlantic Hyalopale bispinosa species complex and five new species from reefs of the Caribbean Sea and Indo-Pacific Oceans." Zootaxa 4671, no. 3 (2019): 339–68. http://dx.doi.org/10.11646/zootaxa.4671.3.2.

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The formerly monotypic taxon, Hyalopale bispinosa Perkins 1985 (Chrysopetalinae), is comprised of a cryptic species complex from predominantly tropical embayments and island reefs of the Western Atlantic and Indo-Pacific Oceans. Hyalopale species are of meiofaunal size (length: 1−2.8mm), but considered non-interstitial, with the majority of species inhabiting a singular habitat of shallow littoral zones among algae and epifauna overlying sediments in rubble. Hyalopale adults exhibit notochaetal fans characterized by the presence of lateral and midline notochaetal spines. Species of Hyalopale c

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Butterfield, Nicholas J. "Bangiomorpha pubescens n. gen., n. sp.: implications for the evolution of sex, multicellularity, and the Mesoproterozoic/Neoproterozoic radiation of eukaryotes." Paleobiology 26, no. 3 (2000): 386–404. http://dx.doi.org/10.1666/0094-8373(2000)026<0386:bpngns>2.0.co;2.

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Multicellular filaments from the ca. 1200-Ma Hunting Formation (Somerset Island, arctic Canada) are identified as bangiacean red algae on the basis of diagnostic cell-division patterns. As the oldest taxonomically resolved eukaryote on record Bangiomorpha pubescens n. gen. n. sp. provides a key datum point for constraining protistan phylogeny. Combined with an increasingly resolved record of other Proterozoic eukaryotes, these fossils mark the onset of a major protistan radiation near the Mesoproterozoic/Neoproterozoic boundary.Differential spore/gamete formation shows Bangiomorpha pubescens t

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GABRIEL, DANIELA, STEFANO G. A. DRAISMA, THOMAS SAUVAGE, et al. "Multilocus phylogeny reveals Gibsmithia hawaiiensis (Dumontiaceae, Rhodophyta) to be a species complex from the Indo-Pacific, with the proposal of G. eilatensis sp. nov." Phytotaxa 277, no. 1 (2016): 1. http://dx.doi.org/10.11646/phytotaxa.277.1.1.

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Gibsmithia hawaiiensis is a peculiar red alga characterized by furry gelatinous lobes arising from a cartilaginous stalk. The species has been recorded from tropical reef systems throughout the Indo-Pacific. A multilocus phylogeny (UPA, rbcL, COI-5P) of 36 specimens collected throughout the species distribution range, showed high genetic diversity at species level. Two major groups were identified, each consisting of multiple lineages. Genetic variability was low in the Hawaiian Islands and the northern Red Sea and high in the Western Indian Ocean and the Coral Triangle, where lineages overlap

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Guimarães, S. M. P. B. "Morphology and systematics of the red algal parasite Dawsoniocolax bostrychiae (Choreocolacaceae, Rhodophyta)." Phycologia 32, no. 4 (1993): 251–58. http://dx.doi.org/10.2216/i0031-8884-32-4-251.1.

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Payo, Dioli Ann, Hilconida Calumpong, and Olivier De Clerck. "Morphology, vegetative and reproductive development of the red alga Portieria hornemannii (Gigartinales: Rhizophyllidaceae)." Aquatic Botany 95, no. 2 (2011): 94–102. http://dx.doi.org/10.1016/j.aquabot.2011.03.011.

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Sethi, Poonam, and Nandhagopal Plant K. "ANATOMICAL STUDIES OF LAURENCIA OBTUSA (HUDSON) LAMOUROUX (CERAMIALES) OF RHODOPHYCEAE." Chemistry & Material Sciences Research Journal 2, no. 2 (2020): 42–46. http://dx.doi.org/10.51594/cmsrj.v2i2.86.

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Thallus of Laurencia obtusa of Rhodophyceae was studied and detailed micromorphological evaluation was done. Morphology of the thallus has been studied to aid pharmacognostic and phytochemical evidences to aid in taxonomic species identification. Parameters presented in this paper may be proposed to establish the authenticity of this red alga and can possibly help to differentiate this alga from its other species. Since the collections were made in the month of March, Laurencia was with few gametophytic thalli . The study revealed several interesting anatomical characters and its cellular deta

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Robbins, PA. "The morphology of Catenellopsis (Catenellopsidaceae, fam. nov.; Rhodophycota)." Australian Systematic Botany 3, no. 4 (1990): 689. http://dx.doi.org/10.1071/sb9900689.

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Catenellopsis oligarthra, a small caespitose red alga endemic to New Zealand, is currently classified with the Gymnophloeaceae (Gigartinales), but it exhibits patterns of vegetative and reproductive morphology previously unknown in the Rhodophycota that suggest the removal of Catenellopsis to a new monotypic family. The plants originate from a basal pulvinus that includes rhizoidal and other secondary filaments. Numerous erect triaxial reproductive branches that lack any capacity for secondary development arise from individual filaments of the pulvinus. Gametophytic branches develop a single c

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Kato, Aki, Masasuke Baba, Hiroshi Kawai, and Michio Masuda. "REASSESSMENT OF THE LITTLE-KNOWN CRUSTOSE RED ALGAL GENUSPOLYSTRATA(GIGARTINALES), BASED ON MORPHOLOGY AND SSU rDNA SEQUENCES." Journal of Phycology 42, no. 4 (2006): 922–33. http://dx.doi.org/10.1111/j.1529-8817.2006.00238.x.

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Aizdaicher, Nina A., Inna V. Stonik, and Zhanna V. Markina. "Adaptive abilities of microscopic red alga Porphyridium purpureum (strain PP-AB11) under change of salinity in the medium." Izvestiya TINRO 186, no. 3 (2016): 157–62. http://dx.doi.org/10.26428/1606-9919-2016-186-157-162.

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Adaptive abilities of the microscopic red alga Porphyridium purpureum (strain PP-AB11, isolated from the northwestern Japan Sea) are investigated experimentally by its repeated cultivation under various water salinity. Under the salinity of 8 ‰, the growth of P. purpureum was inhibited (0.1 division/day) during the first four days though there were no morphological differences of the cells as compared with those in the control (mean cell size was 6.3±1.2 µm in both cases); the cell density increased to 85 % of the control value after 21 days exposure. Under the salinity of 4 ‰, the lag-phase w

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Ligowski, Ryszard, ADIL Y. AL-HANDAL, ANGELA WULFF, and RICHARD W. JORDAN. "Rhoicosphenia michali: a new species of marine diatom (Bacillariophyta) from King George Island, Antarctica." Phytotaxa 191, no. 1 (2014): 141. http://dx.doi.org/10.11646/phytotaxa.191.1.9.

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Rhoicosphenia michali sp. nov., described from the shallow sublittoral zone in Antarctica, is the second species in the genus with just one raphe slit on its convex valve. The first species, Rhoicosphenia flexa, was also described from marine coastal habitats in the Southern Hemisphere. Here, the morphology and ecology of R. flexa and R. michali are compared. The new species described herein may be endemic to Antarctica and can be found as free living cells on the shallow seabed, although it mainly occurs on the red alga Georgiella confluens, which is endemic to Antarctica.

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Schmidt, Éder C., Marthiellen R. de L. Felix, Luz K. Polo, et al. "Influence of cadmium and salinity in the red alga Pterocladiella capillacea: cell morphology, photosynthetic performance and antioxidant systems." Brazilian Journal of Botany 38, no. 4 (2015): 737–49. http://dx.doi.org/10.1007/s40415-015-0183-5.

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Markina, Zh V., and N. A. Aizdaicher. "The effect of copper on the abundance, cell morphology and content of photosynthetic pigments in the microalga Porphyridium purpureum." Marine Biological Journal 4, no. 4 (2019): 34–40. http://dx.doi.org/10.21072/mbj.2019.04.4.03.

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Red microalga Porphyridium purpureum adaptive abilities to copper intoxication were studied. Cell number dynamics and morphology, contents of chlorophyll a and carotenoids were used as test-points. The experiment was conducted in two stages. At the first stage the effect of copper in concentrations of 50 and 100 µg·l−1 was studied; at the second stage the alga adaptive abilities to growth in copper contaminated medium were assessed. At the first stage copper concentration of 50 µg·l−1 didn’t influence the parameters under study. Addition of 100 µg·l−1 caused growth inhibition and photosyntheti

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