Results 131 to 140 of about 825 (153)

Cultivation and inorganic carbon uptake of the rare desmidOocardium stratum(Conjugatophyceae)

Phycologia, 2014
The desmid Oocardium stratum is sporadically and exclusively found in active meteogene travertine habitats. The restriction to these peculiar biotopes is probably linked to specific carbon requirements. We studied inorganic carbon (Ci) uptake under controlled laboratory conditions. First, we developed a method for isolating and cultivating O.
Schagerl, Michael, Wukovits, Julia
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Intercellular Communication During Sexual Reproduction of Closterium (Conjugatophyceae)

Journal of Plant Research, 2000
were reviewed. In the case of Closterium peracerosum-strigosum-littorale complex, two sex-specific pheromones and their receptors were involved in sexual reproduction. These pheromones were glycoproteins and the expression of corresponding genes was critically regulated by the sex and environmental conditions.
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Some observations on cell wall structure and taxonomy ofPhymatodocis nordstedtiana (Conjugatophyceae, Chlorophyta)

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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Diversity of the green algal genusSpirogyra(Conjugatophyceae) in the Hawaiian Islands

Phycologia, 2018
Abstract 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, Jessica M. Neumann, Monica Dittbern-Wang, Kimberly Y. Conklin   +3 more
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A Checklist of Desmids (Conjugatophyceae, Chlorophyta) of Serbia. III. GenusStaurastrum

Cryptogamie, Algologie, 2011
Abstract 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, Mirko Cvijan, Jelena Krizmanić   +2 more
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A Checklist of Desmids (Conjugatophyceae, Chlorophyta) of Serbia. II. GenusCosmarium

Cryptogamie, Algologie, 2011
Abstract 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, Mirko Cvijan, Marija Stamenković   +2 more
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The extracellular polymeric substances of desmids (Conjugatophyceae, Streptophyta): chemistry, structural analyses and implications in wetland biofilms

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, David S. Domozych, Michael R. Gretz   +2 more
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New species of desmids (Conjugatophyceae, Charophyta) to the algale flora of Moscow region

Moscow University Biological Sciences Bulletin, 2015
Samples 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, 1984
ABSTRACTThe 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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Action of cytochalasin B on cytoplasmic streaming systems and morphogenesis in Micrasterias torreyi (Conjugatophyceae)

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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