Photosynthetic and transcriptome responses to fluctuating light in Arabidopsis thylakoid ion transport triple mutant.

ABSTRACT: Fluctuating light intensity challenges fluent photosynthetic electron transport in plants, inducing photoprotection while diminishing carbon assimilation and growth, and also influencing photosynthetic signaling for regulation of gene expression. Here, we employed in vivo chlorophyll-a fluorescence and P700 difference absorption measurements to demonstrate the enhancement of photoprotective energy dissipation of both photosystems in wild-type Arabidopsis thaliana after 6 h exposure to fluctuating light as compared with constant light conditions. This acclimation response to fluctuating light was hampered in a triple mutant lacking the thylakoid ion transport proteins KEA3, VCCN1, and CLCe, leading to photoinhibition of photosystem I. Transcriptome analysis revealed upregulati

SUBMITTER: Gollan PJ 

PROVIDER: S-EPMC10598627 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature