engleski

Newly described mechanisms in hydra-alga symbiosis

Mechanisms of green hydra symbiosis were described. Herbicide norflurazon was chosen as a "trigger" for observing of these mechanisms. Green hydra (Hydra viridissima Pallas, 1766) is a typical example of endosymbiosis. In its gastrodermal myoepithelial cells it contains the individuals of Chlorella vulgaris Beij. (K&H, 1992) species (so far data). Ultrastructural changes were observed by means of TEM. Newly observed, described and estblished mechanisms in green hydra symbiosis were widening of the perailgal space, missing symbisomes and joining of the existing perialgal spaces. Also, on the basis of these newly described mechanisms, recovery of green hydra after the intoxication period was explained. The final result of the disturbed symbiosis between hydra and alga was the reassembling of the endosymbiosis in particular individuals that survived.

green hydra; alga; Chlorella; symbiosis; perialgal space; symbiosome; symbiosis reassembly

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