The life history of Alexandrium pseudogonyaulax (Gonyaulacales, Dinophyceae)
1995; Taylor & Francis; Volume: 34; Issue: 6 Linguagem: Inglês
10.2216/i0031-8884-34-6-444.1
ISSN2330-2968
Autores Tópico(s)Aquatic Ecosystems and Phytoplankton Dynamics
ResumoAbstractAlexandrium pseudogonyaulax (Biecheler) Horiguchi ex Yuki et Fukuyo (Gonyaulacales, Dinophyceae) is a phototrophic marine dinoflagellate that produces an unusual paratabulate resting cyst. Studies of vegetative and sexual reproduction were conducted on a clonal culture established from germination of a resting cyst from Fusaro Lagoon, Italy. Vegetative division in A. pseudogonyaulax takes place inside a vegetative cyst, from which two, or at times four, daughter cells originate. The daughter cells completely resynthesize new cell walls. Cyst formation takes place after sexual reproduction. A large biflagellate zygote is formed after a conjugation process in which one of the two gametes is engulfed by the other.
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