A1 Journal article – refereed
Antimycin A effect on the electron transport in chloroplasts of two Chlamydomonas reinhardtii strains




List of Authors: Antal TK, Kukarskikh GP, Bulychev AA, Tyystjärvi E, Krendeleva T
Publisher: SPRINGER
Publication year: 2013
Journal: Planta
Journal name in source: PLANTA
Journal acronym: PLANTA
Number in series: 5
Volume number: 237
Issue number: 5
Number of pages: 10
ISSN: 0032-0935

Abstract
The effects of antimycin A on the redox state of plastoquinone and on electron donation to photosystem I (PS I) were studied in sulfur-deprived Chlamydomonas reinhardtii cells of the strains cc406 and 137c. We found that this reagent suppresses cyclic electron flow around PS I in the cc406 strain, whereas this inhibitory effect was completely absent in the 137c strain. In the latter strain, antimycin A induced rapid reduction of plastoquinone in the dark and considerably enhanced the rate of electron donation to P-700 (+) in the dark. Importantly, neither myxothiazol, an inhibitor of mitochondrial respiration, FCCP, a protonophore, nor propyl gallate, an inhibitor of the plastid terminal oxidase, induced such a strong effect like antimycin A. The results indicate that in the chloroplast of the 137c strain, antimycin A has a site of action outside of the machinery of cyclic electron flow.

Last updated on 2019-20-07 at 11:36