Abstract
The endosymbiotic unit of Paramecium bursaria with Chlorella sp. photoaccumulates in white, blue-green, and red light (λ<700 nm), whereas alga-free Paramecia never do. The intensity of photoaccumulation depends on both the light fluence rate and the size of the symbiotic algal population. Photoaccumulation can be stopped completely with 3-(3′,4′-dichlorophenyl)-1,1-dimethylurea (DCMU), an inhibitor of photosynthetic electron transport. Hence the photosynthetic pigments of the algae act as receptors of the light stimulus for photomovement and a close connection must exist between photosynthesis of the algae and ciliary beating of the Paramecium.
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Niess, D., Reisser, W. & Wiessner, W. The role of endosymbiotic algae in photoaccumulation of green Paramecium bursaria . Planta 152, 268–271 (1981). https://doi.org/10.1007/BF00385155
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DOI: https://doi.org/10.1007/BF00385155