Journal
CELL REPORTS
Volume 29, Issue 12, Pages 4186-+Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2019.11.051
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Funding
- Howard Hughes Medical Institute
- NIH [R35GM122604]
- U.S. Department of Energy [DE-FG02-04ER15540]
- Hundred Talents Program of Zhejiang University
- NIH-NCI CCSG [P30 014195]
- Chapman Foundation
- Helmsley Charitable Trust
- Helmsley Center for Genomic Medicine
- U.S. Department of Energy (DOE) [DE-FG02-04ER15540] Funding Source: U.S. Department of Energy (DOE)
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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-defective mutant nced3nced5, as well as pif4, pif5, pif4,5, and pif1,3,4,5 mutants, are hypersensitive to HL. Our study presents the dynamic and specific high-intensity light-driven transcriptional landscape in plants during HL stress.
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