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Morphological variability of Tetrastrum triangulare and T-komarekii (Chlorophyta, Chlorococcales) in clonal cultures



Morphological variability of Tetrastrum triangulare and T-komarekii (Chlorophyta, Chlorococcales) in clonal cultures



Phytologia Balcanica 13(1): 35-40



Variability of some diagnostic features, such as pyrenoids, syncoenobia, and type and size of coenobia of two species of the genus Tetrastrum, T. triangulare and T. komarekii, were studied in extensive and intensive cultures. Clone cultures with a specific initial coenobium for both species were used. Variability in clone cultures was traced out at three different temperatures. The influence of nutritious solutions with different concentrations was investigated by intensive cultivation. The presence of a pyrenoid is the main diacritical feature for the two species, as it was observed in all T. triangulare cells, but not in T. komarekii cells. Development of syncoenobia can be used as an additional diacritical feature. Regarding the coenobia size in our cultures, T. komarekii has shown by about 1/3 smaller size than T. triangulare.

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