Plastoquinone pool redox state and control of state transitions in Chlamydomonas reinhardtii in darkness and under illumination.

ABSTRACT: Movement of LHCII between two photosystems has been assumed to be similarly controlled by the redox state of the plastoquinone pool (PQ-pool) in plants and green algae. Here we show that the redox state of the PQ-pool of Chlamydomonas reinhardtii can be determined with HPLC and use this method to compare the light state in C. reinhardtii with the PQ-pool redox state in a number of conditions. The PQ-pool was at least moderately reduced under illumination with all tested types of visible light and oxidation was achieved only with aerobic dark treatment or with far-red light. Although dark incubations and white light forms with spectral distribution favoring one photosystem affected the redox state of PQ-pool differently, they induced similar Stt7-dependent state transitions. Thus, under ill

SUBMITTER: Virtanen O 

PROVIDER: S-EPMC9792418 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature