Results 151 to 160 of about 833 (179)
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Inhibition of Chara vulgaris oospore germination by sulfidic sediments
Aquatic Botany, 2009Abstract The germinability of Chara vulgaris oospores collected from the sediments of four Ontario lakes varies considerably, ranging in germination percentage from 7% to 54%. Chemical analysis of the interstitial water of the sediments indicated that oospores with low germination occurred in lakes which have high acid volatile sulfides (H 2 S, FeS,
Joana Sederias, Brian Colman
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Sterols of Nitella flexilis and Chara vulgaris
Phytochemistry, 1972Abstract The principal sterols of Nitella flexilis were identified as clionasterol and 28-isofucosterol—58 and 36%, respectively, of the total sterol. Clionasterol and 28-isofucosterol were also the principal sterols of Chara vulgaris , making up 39 and 54% of the total sterol, respectively.
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Toxic effects of linear alkylbenzene sulfonate on Chara vulgaris L.
Environmental Science and Pollution Research, 2017Linear alkylbenzene sulfonate (LAS) is a common organic pollutant in freshwater environments. Studies have shown that the toxicity of LAS to aquatic plants is directly related to the LAS concentration and depends on the plant species. A 2-week exposure experiment was designed to investigate the toxicity of LAS for the submerged plant Chara vulgaris L ...
Nian, Liu, Zhonghua, Wu
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Salinity response of a freshwater charophyte, Chara vulgaris
Plant, Cell & Environment, 1990Abstract. Chara vulgaris L. growing in an oligohaline lake was adapted to laboratory conditions and subjected to long‐term salinity treatments ranging from 0 to 350 mol m 3 NaCl added to the lake water (40–680 mosmol kg 1). Osmotic potential and concentration of the main osmotically active solutes (K+, Na+, Mg2+, Cl and sucrose) in the vacuolar sap of
U. WINTER, G. O. KIRST
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The electrical potential difference and resistance of Chara vulgaris
Canadian Journal of Botany, 1976A study has been made of the electrical properties of the large central internodal cell of Chara vulgaris. The mean electrical potential difference (± standard deviation) measured in the light between the vacuole and the external, artificial pond water was −165 (±10) mV. This was much larger than the Nernst potentials for potassium, sodium, magnesium,
Susan Murdoch, John Sinclair
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Delayed ‘Primary’ Effects in Chara vulgaris L. subjected to X-Rays
Nature, 1960‘PRIMARY’ or ‘non-localized’ effects in the form of clumping of metaphase chromosomes or the sticking together of sister chromatids in cells that complete mitosis shortly after irradiation during the period when mitotic frequency is decreasing have already been described by numerous investigators.
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Phycologia, 1987
Abstract Densitometric measurements of DNA were carried out on interphase nuclei of young shoots of Chara vulgaris and Tolypella glomerata coloured using the Feulgen technique. The results showed that in the two genera examined a maximum of 20–30% of the nuclei measured had a haploid cycle whereas at least 70% were polyploids (amount of DNA > 2C ...
N. Michaux-Ferrière +1 more
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Abstract Densitometric measurements of DNA were carried out on interphase nuclei of young shoots of Chara vulgaris and Tolypella glomerata coloured using the Feulgen technique. The results showed that in the two genera examined a maximum of 20–30% of the nuclei measured had a haploid cycle whereas at least 70% were polyploids (amount of DNA > 2C ...
N. Michaux-Ferrière +1 more
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The interaction of light and low temperature on breaking the dormancy of Chara vulgaris oospores
Aquatic Botany, 2007Abstract Germination and dormancy-breaking requirements have been investigated of Chara vulgaris , L. oospores harvested from surface sediments and from the plants of two lakes, Schumacher and Little Pearl in the locality of Timmins, northern Ontario.
Joana Sederias, Brian Colman
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Electron microscope studies on surface activity in cells of Chara vulgaris
Planta, 1965Small ‘fleck-like’ structures have been observed in the cell walls of developing lateral branches of Chara vulgaris. These were orientated with their flat surface parallel to the plasmalemma, and appeared to lie in definite layers at different depths in the wall. It was considered that these structures were membranous material periodically incorporated
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