Characterization of Photosynthetic Rhythms in Marine Dinoflagellates | Zendy

Barbara B. Prézelin | Zendy; Blanche W. Meeson | Zendy; Beatrice M. Sweeney | Zendy

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Characterization of Photosynthetic Rhythms in Marine Dinoflagellates

Author(s) -

Barbara B. Prézelin,

Blanche W. Meeson,

Beatrice M. Sweeney

Publication year - 1977

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.60.3.384

Subject(s) - photosynthesis , circadian rhythm , biology , rhythm , respiration , botany , phytoplankton , dinoflagellate , chlorophyll a , algae , ecology , philosophy , neuroscience , nutrient , aesthetics

Circadian rhythms in photosynthesis were defined for the first time in the dinoflagellates Glenodinium sp. (M. Bernard strain) and Ceratium furca Ehrenberg (B. Meeson strain) and compared with that in Gonyaulax polyedra Stein. All three phytoplankton species had photosynthetic rhythms with daily amplitudes ranging from 3 to 5 and maxima displayed about midday. The photosynthetic pigment content and absorption properties of the cells were constant over the circadian cycle. Diurnal periodicities in respiration never accounted for more than 30% of the photosynthetic rhythm and did not persist under constant conditions. There was sufficient similarity between the circadian rhythms of these three dinoflagellates to suggest the mechanism of regulation may be the same for each of them.

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