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Biochem Biophys Res Commun. 2019 Oct 17. pii: S0006-291X(19)32003-0. doi: 10.1016/j.bbrc.2019.10.101. [Epub ahead of print]

COE 1 and GUN1 regulate the adaptation of plants to high light stress.

Author information

1
State Key Laboratory of Cotton Biology, Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, 85 Minglun Street, Kaifeng, 475001, China.
2
State Key Laboratory of Cotton Biology, Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, 85 Minglun Street, Kaifeng, 475001, China; College of Life and Environment Sciences, Shanghai Normal University, Guilin Road 100, Shanghai, 200234, China.
3
State Key Laboratory of Cotton Biology, Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, 85 Minglun Street, Kaifeng, 475001, China; Department of Molecular Biology, University of Geneva, Geneva, 1211, Switzerland; Department of Plant Biology, University of Geneva, Geneva, 1211, Switzerland.
4
State Key Laboratory of Cotton Biology, Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, 85 Minglun Street, Kaifeng, 475001, China. Electronic address: sunxuwussd@sina.com.

Abstract

In order to withstand high light (HL) stress, plants have evolved both short-term defense and repair mechanisms and long-term acclimation responses. At present, however, the underlying signaling events and molecular mechanisms are still poorly understood. Analysis of the mutants coe1, coe1 gun1 double mutant and oeGUN1coe1 revealed increased sensitivity to HL stress as compared to wild type (WT), with oeGUN1 coe1 plants displaying the highest sensitivity. Accumulation of FTSH2 protein and degradation of D1 protein during the HL stress were shown to depend on both COE1 and GUN1. Overexpression of COE1 enhanced the induction of FTSH2 and the tolerance to HL stress. These results indicate that the COE1-GUN1 signaling pathway plays an important role in regulating the adaptation of plants to HL.

KEYWORDS:

Adaptation; COE1; GUN1; High light stress

PMID:
31630799
DOI:
10.1016/j.bbrc.2019.10.101

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