Photomovement inCyanophora paradoxa

✍ Scribed by Donat-P. Häder

• Book ID: 104764915
• Publisher: Springer
• Year: 1985
• Tongue: English
• Weight: 480 KB
• Volume: 143
• Category: Article
• ISSN: 0302-8933
• DOI: 10.1007/bf00414776

✦ Synopsis

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.