Abstract
Photomovement has been studied in the symbiontic association of the colorless flagellate, Cyanophora paradoxa Korschikoff with the cyanelles, Cyanocyta korschikoffiana. There is no phototactic orientation in this organism, but a photokinetic effect. In addition, the cells show a pronounced step-up photophobic response (however no or only a weak step-down response). The phobic response is mediated by a subset of the photosynthetic pigments located in the symbiontic cyanelles. It is linked to the noncyclic photosynthetic electron transport chain but it is independent of the photosynthetic generation of a proton gradient and the ATP synthesis linked to it.
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Abbreviations
- CCCP:
-
carbonyl cyanide m-chlorophenyl hydrazone
- DBMIB:
-
2,5-dibromo-3-methyl-6-isopropylbenzo quinone
- DCMU:
-
3-(3,4-dichlorophenyl)-1,1-dimethylurea
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Häder, DP. Photomovement in Cyanophora paradoxa . Arch. Microbiol. 143, 100–104 (1985). https://doi.org/10.1007/BF00414776
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DOI: https://doi.org/10.1007/BF00414776