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NOTES ON SEXUAL REPRODUCTION IN DESMIDS.: II. EXPERIENCES WITH CONJUGATION EXPERIMENTS IN UNI‐ALGAL CULTURES
Author(s) -
Coesel P. F. M.,
Teixeira R. M. V.
Publication year - 1974
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1974.tb00972.x
Subject(s) - homothallism , sexual reproduction , reproduction , biology , algae , botany , ecology , zoology , mating type , genetics , gene
SUMMARY Over 120 randomly selected strains belonging to 16 genera and to more than 80 species of Desmids were brought into uni‐algal culture and subjected to conditions provoking conjugation. Only 3 isolates – all homothallic – exhibited sexual reproduction: Closterium limneticum Lemn., Cl. moniliferum Bory ex Ralfs, and Micrasterias papillifera Bréb. Of Cl. limneticum no zygospores had previously been known. The, generally speaking, poor result of the experiment supports the theory that it is a lack of sexual potential rather than ecological factors which is responsible for the rare incidence of sexual reproduction in Desmids under natural conditions.