The Arabidopsis Transcriptome Responds Specifically and Dynamically to High Light Stress.

ABSTRACT: The dynamic and specific transcriptome for high light (HL) stress in plants is poorly understood because heat has confounded previous studies. Here, we perform an in-depth temporal responsive transcriptome analysis and identify the core HL-responsive genes. By eliminating the effect of heat, we uncover a set of genes specifically regulated by high-intensity light-driven signaling. We find that 79% of HL-responsive genes restore their expression to baseline within a 14-h recovery period. Our study reveals that plants respond to HL through dynamic regulation of hormones, particularly abscisic acid (ABA), photosynthesis, and phenylpropanoid pathway genes. Blue/UV-A photoreceptors and phytochrome-interacting factor (PIF) genes are also responsive to HL. We further show that ABA biosynthesis-de

SUBMITTER: Huang J 

PROVIDER: S-EPMC7030938 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature