Studies on cultures of Ostreopsis cf ovata: life cycle observations
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AuthorsBravo, I. (Isabel); Vila, M. (Magda); Magadán-Mompó, S. (Susana); Rial, P. (Pilar); Rodríguez, F. (Francisco); Fraga, S. (Santiago); Franco, J.M. (José Mariano); Riobó, P. (Pilar); Sala, M.M. (Montserrat)
Asexual and sexual reproduction were studied in cultures of Ostreopsis cf ovata isolated from several locations in the Mediterranean Sea. Asexual division took place in the motile stage by sharing of the theca (desmoschisis). High cell-size variability was observed in the cultures and differences in division capability were detected. Fusing gamete pairs were the only sexual state confirmed. Most of the gamete pairs isolated divided before the fusion was completed. Pellicle and thecate cysts were the only cyst-like cells which showed germination.