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In strict photoautotrophs, and in many mixotrophic protists, growth at low light stimulates the increased content of photopigment. This photoacclimation further elevates cellular Chl:C content through positive feedback (self-shading), until cellular Chl:C attains a maximum (ChlC max ). This process, driven by the “selfish gene”, enhances the fitness of the individual but decreases total population...
The marine dinoflagellate Amphisolenia bidentata possesses complete intracellular symbionts of prokaryotic and eukaryotic origin. This was confirmed ultrastructurally little over 20 years ago when it was showed that the eukaryotic endosymbiont had a nucleus, a chloroplast and mitochondria. We collected Amphisolenia bidentata cells in the Indian Ocean and the identity of the eukaryotic endosymbionts...
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