Presence of state transitions in the cryptophyte alga Guillardia theta.

ABSTRACT: Plants and algae have developed various regulatory mechanisms for optimal delivery of excitation energy to the photosystems even during fluctuating light conditions; these include state transitions as well as non-photochemical quenching. The former process maintains the balance by redistributing antennae excitation between the photosystems, meanwhile the latter by dissipating excessive excitation inside the antennae. In the present study, these mechanisms have been analysed in the cryptophyte alga Guillardia theta. Photoprotective non-photochemical quenching was observed in cultures only after they had entered the stationary growth phase. These cells displayed a diminished overall photosynthetic efficiency, measured as CO2 assimilation rate and electron transport rate. However, in the loga

SUBMITTER: Cheregi O 

PROVIDER: S-EPMC4588893 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature