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Evidence for a sexual cycle in the Florida red tide dinoflagellate, Ptychodiscus brevis (= Gymnodinium breve)
Walker, L.M. (1982). Evidence for a sexual cycle in the Florida red tide dinoflagellate, Ptychodiscus brevis (= Gymnodinium breve). Trans. Am. Microsc. Soc. 101(3): 287-293
In: Transactions of the American Microscopical Society. Blackwell Publishing: Lawrence, Kan., etc.,. ISSN 0003-0023; e-ISSN 2325-5145
Peer reviewed article  
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    Reproduction > Sexual reproduction
    Marien/Kust
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  • Walker, L.M.
Abstract
    Sexual stages (gametes, planozygotes) were observed in non-clonal strains of P. brevis stock cultures. Sexual stages were induced repeatedly in non-clonal isolates and crosses of six different isolates using nitrogen-deficient NH-15 medium, blue or green light, and/or lowered temperatures. Sexual stages also have been observed in field populations during Florida red tides. So far, hypnozygotic cysts have not been confirmed in laboratory cultures or field populations, although possible cysts have been observed during cold temperature experiments, initial experiments with multiple crosses, and during continuous 24-hour sampling during a red tide cruise in January 1980.
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