Phosphorylation of chloroplast membrane proteins partially protects against photoinhibition

✍ Scribed by P. Horton; P. Lee

• Book ID: 104752936
• Publisher: Springer-Verlag
• Year: 1985
• Tongue: English
• Weight: 555 KB
• Volume: 165
• Category: Article
• ISSN: 0032-0935
• DOI: 10.1007/bf00392209

✦ Synopsis

Thylakoids isolated from peas (Pisum sativum cv. Kelvedon Wonder) and phosphorylated by incubation with ATP have been compared with non-phosphorylated thylakoids in their sensitivity to photoinhibition by exposure to illumination in vitro. Assays of the kinetics of fluorescence induction at 20~ and the fluorescence emission spectra at -196~ indicate a proportionally larger decrease in fluorescence as a result of photoinhibitory treatment of non-phosphorylated compared with phosphorylated thylakoids. It is concluded that protein phosphorylation can afford partial protection to thylakoids exposed to photoinhibitory conditions.