title: The role of endosymbiotic algae in photoaccumulation of green Paramecium bursaria.
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.
authors.affiliation: Abteilung für Experimentelle Phykologie, Pflanzenphysiologisches Institut der Universität, Untere Karspüle 2, D-3400, Göttingen, Federal Republic of Germany.
authors.forename: D
authors.initials: D
authors.lastname: Niess
authors.forename: W
authors.initials: W
authors.lastname: Reisser
authors.forename: W
authors.initials: W
authors.lastname: Wiessner