The relationship between state II to state I transitions and cyclic electron flow around photosystem I

K Satoh; D C Fork

doi:10.1007/BF00041820

The relationship between state II to state I transitions and cyclic electron flow around photosystem I

Photosynth Res. 1983 Jan;4(1):245-56. doi: 10.1007/BF00041820.

Authors

K Satoh¹, D C Fork

Affiliation

¹ Department of Plant Biology, Carnegie Institution of Washington, 290 Panama Street, 94305, Stanford, CA, USA.

PMID: 24458403
DOI: 10.1007/BF00041820

Abstract

The effects of electron acceptors, inhibitors of electron flow and uncouplers and inhibitors of photophosphorylation on a state II to I transition were studied. 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) did not inhibit the state II to I transition. By contrast, 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone (DBMIB), methyl viologen and antimycin A inhibited the transition indicating that the cyclic electron flow around photosystem I, but not the oxidation of electron carriers (such as plastoquinone), induced the state II to I transition. Uncouplers, but not inhibitors of photophosphorylation, inhibited the state transition suggesting that the proton transport through the cyclic electron flow was related to the transition.