The Effect of Temperature on Vegetative Growth and Sexual Reproduction of Two Diatoms from the Genus Haslea Simonsen

The effect of temperature on sexual reproduction and the rate of vegetative division were investigated in laboratory experiments with Haslea ostrearia (Gaillon) Simonsen from the Atlantic and H. karadagensis Davidovich, Gastineau et Mouget from the Black Sea. In the range of 10–26°С, a temperature i...

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Bibliographic Details
Published in:Russian journal of marine biology 2018, Vol.44 (1), p.8-13
Main Authors: Davidovich, O. I., Davidovich, N. A., Mouget, J.-L.
Format: Article
Language:English
Subjects:
Algae
Biodiversity and Ecology
Biomedical and Life Sciences
Cell size
Diatoms
Environmental Sciences
Freshwater & Marine Ecology
Growth rate
Life Sciences
Natural populations
Reproduction
Sexual reproduction
Size distribution
Temperature
Temperature effects
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Summary:The effect of temperature on sexual reproduction and the rate of vegetative division were investigated in laboratory experiments with Haslea ostrearia (Gaillon) Simonsen from the Atlantic and H. karadagensis Davidovich, Gastineau et Mouget from the Black Sea. In the range of 10–26°С, a temperature increase was favorable for vegetative growth; the maximum growth rate was recorded at the highest temperature of the range. In contrast to vegetative growth, sexual reproduction of both algal species was effective in the temperature range of 10–18°С, but did not occur at temperatures of 23°С. The optimal temperature for auxosporulation was in H. karadagensis somewhat lower than in H. ostrearia . The determined physiological optimums for sexual reproduction can explain the cell-size distribution that is characteristic of the natural population of H. karadagensis in different seasons of the year.
ISSN:1063-0740
1608-3377
DOI:10.1134/S1063074018010030