Results 121 to 130 of about 307 (145)
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Plant Systematics and Evolution, 1981
Filaments ofPhymatodocis nordstedtiana Wolle were isolated from a sample of a Texan lake. Cultures were established and examined by light and scanning electron (SEM) as well as transmission electron microscopy (TEM). It is shown that the pores apparent on light microscopical examination are not of the cosmaroid type as expected.
Monika Engels, D. W. Lorch
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Filaments ofPhymatodocis nordstedtiana Wolle were isolated from a sample of a Texan lake. Cultures were established and examined by light and scanning electron (SEM) as well as transmission electron microscopy (TEM). It is shown that the pores apparent on light microscopical examination are not of the cosmaroid type as expected.
Monika Engels, D. W. Lorch
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Diversity of the green algal genusSpirogyra(Conjugatophyceae) in the Hawaiian Islands
Phycologia, 2018Abstract Identification of species in the green algal genus Spirogyra is complicated by cryptic morphological diversity, seasonality of critical features of sexual reproduction necessary for morphological identification, the presence of polyploid species groups and a lack of molecular sequence data tied to authentic specimens.
Alison R. Sherwood +3 more
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A Checklist of Desmids (Conjugatophyceae, Chlorophyta) of Serbia. III. GenusStaurastrum
Cryptogamie, Algologie, 2011Abstract The first data about the distribution of desmids in Serbia derive from the year 1883 and from that time up to the end of 2010 there were identified 646 different taxa. The species-rich genus Staurastrum is represented with 116 taxa which is about 18% of the total number of desmids in Serbia.
Sanja Fužinato +2 more
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A Checklist of Desmids (Conjugatophyceae, Chlorophyta) of Serbia. II. GenusCosmarium
Cryptogamie, Algologie, 2011Abstract The desmid flora of Serbia has been surveyed during various periods. The first data on the distribution of desmids in Serbia date back to 1883 and from then on until 2009 altogether 630 different taxa were identified. Among 23 genera of desmids in all, the most diverse and most commonly found is Cosmarium (242 taxa or 38.4% of the total number
Sanja Fužinato +2 more
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Phycologia, 2007
Abstract Desmids represent a group of advanced green algae that are commonly found in biofilm communities of freshwater wetlands. Desmids secrete significant amounts of extracellular polymeric substances (EPS) that form an extensive mucilaginous sheath external to the cell wall and function in adhesion, gliding-based movements and ultimate ensheathment
Sarah N. Kiemle +2 more
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Abstract Desmids represent a group of advanced green algae that are commonly found in biofilm communities of freshwater wetlands. Desmids secrete significant amounts of extracellular polymeric substances (EPS) that form an extensive mucilaginous sheath external to the cell wall and function in adhesion, gliding-based movements and ultimate ensheathment
Sarah N. Kiemle +2 more
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New species of desmids (Conjugatophyceae, Charophyta) to the algale flora of Moscow region
Moscow University Biological Sciences Bulletin, 2015Samples of algae were collected in swamps situated at PavlovoPosad in Moscow region. Alto gether, 141 species and varieties were found; 30 taxa of them are new to the region and six taxa are new to Russia. Descriptions of the taxa were improved by data on cell wall ornamentation obtained by SEM meth ods. Original descriptions and photos of algae new to
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TIME LAPSE ANALYSES OF SEXUAL REPRODUCTION IN CLOSTERIUM EHRENBERGII (CONJUGATOPHYCEAE)1
Journal of Phycology, 1984ABSTRACTThe process of sexual differentiation was studied using heterothallic clones of Closterium ehrenbergii Meneghini. The first visible sign of sexual reproduction was agglutination of two or more cells in a group and this was followed by gametangiogenic division and conjugation of gametangial cells.
Terunobu Ichimura, Fumie Kasai
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British Phycological Journal, 1988
In the course of a biosystematic investigation into Closterium ehrenbergii and C. moniliferum, 278 clones of these species originating from 17 populations in The Netherlands and England were screened for their electrophoretic banding patterns with respect to the enzymes catalase, shikimate dehydrogenase, malic enzyme, acid phosphatase and isocitrate ...
Coesel, P.F.M., Menken, S.B.J.
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In the course of a biosystematic investigation into Closterium ehrenbergii and C. moniliferum, 278 clones of these species originating from 17 populations in The Netherlands and England were screened for their electrophoretic banding patterns with respect to the enzymes catalase, shikimate dehydrogenase, malic enzyme, acid phosphatase and isocitrate ...
Coesel, P.F.M., Menken, S.B.J.
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Nordic Journal of Botany, 1983
The effects of cytochalasin B on the development and morphology of the Micrasterias cell vary according to different developmental stages. CB (especially 5–6 μm/ml) does not stop the growth of a developing semicell during early developmental stages and allows the formation of a three–lobed ...
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The effects of cytochalasin B on the development and morphology of the Micrasterias cell vary according to different developmental stages. CB (especially 5–6 μm/ml) does not stop the growth of a developing semicell during early developmental stages and allows the formation of a three–lobed ...
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