Dependence of the rate-limiting steps in the dark-to-light transition of photosystem II on the lipidic environment of the reaction center.

ABSTRACT: In our earlier works, we have identified rate-limiting steps in the dark-to-light transition of PSII. By measuring chlorophyll a fluorescence transients elicited by single-turnover saturating flashes (STSFs) we have shown that in diuron-treated samples an STSF generates only F₁ (< F_m) fluorescence level, and to produce the maximum (F_m) level, additional excitations are required, which, however, can only be effective if sufficiently long Δτ waiting times are allowed between the excitations. Biological variations in the half-rise time (Δτ _1/2) of the fluorescence increment suggest that it may be sensitive to the physicochemical environment of PSII. Here, we investigated the influence of the lipidic environment on Δτ

SUBMITTER: Magyar M 

PROVIDER: S-EPMC11559480 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature