Journal article
Photoregulation in a Kleptochloroplastidic Dinoflagellate, Dinophysis acuta
Some phagotrophic organisms can retain chloroplasts of their photosynthetic prey as so-called kleptochloroplasts and maintain their function for shorter or longer periods of time. Here we show for the first time that the dinoflagellate Dinophysis acute takes control over "third-hand" chloroplasts obtained from its ciliate prey Mesodinium spp. that originally ingested the cryptophyte chloroplasts.
With its kleptochloroplasts, D. acuta can synthesize photosynthetic as well as photoprotective pigments under long-term starvation in the light. Variable chlorophyll fluorescence measurements showed that the kleptochloroplasts were fully functional during 1 month of prey starvation, while the chlorophyll a-specific inorganic carbon uptake decreased within days of prey starvation under an irradiance of 100 mu mol photons m(-2) s(-1).
While a acute cells can regulate their pigmentation and function of kleptochloroplasts they apparently lose the ability to maintain high inorganic carbon fixation rates.
Language: | English |
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Publisher: | Frontiers Media S.A. |
Year: | 2016 |
Pages: | 1-11 |
ISSN: | 1664302x |
Types: | Journal article |
DOI: | 10.3389/fmicb.2016.00785 |
ORCIDs: | 0000-0003-0228-9621 , 0000-0003-3249-0297 , 0000-0002-1792-4790 and Nielsen, Lasse Tor |