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Plant and Cell Physiology, 1982, Vol. 23, No. 5 833-841
© 1982

Article

Effect of Uncouplers on Photo-reactivation of Tris(pH 8.8) and 2,6-Dichlorophenol Indophenol-treated Chloroplasts

Takashi Yamashita

Institute of Biological Sciences, Tsukuba University Sakura-mura, Ibaraki 305, Japan

The oxygen-evolving activity of chloroplasts was lost by Tris(pH 8.8)-washing and restored by 2,6-dichlorophenol indophenol treatment and light exposure. One function of light was the generation of a high-energy state ({delta}pH) in chloroplasts, because the addition of uncouplers such as carbonylcyanide-m-chlorophenylhydrazone, atebrin, NH4Cl, gramicidin J(S), valinomycin, A23187 [GenBank] and tetracaine inhibited restoration of the oxygen-evolving activity. The generation of a high-energy state in these chloroplasts was proven by the light-induced H+-incorporation and uncoupler-stimulated electron transport of the Mehler reaction type.

(Received February 15, 1981; Accepted May 12, 1982)
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