COLD-REGULATED GENE27 integrates signals from light and the circadian clock to promote hypocotyl growth in arabidopsis

Zhu，Wei1; Zhou，Hua1; Lin，Fang1; Zhao，Xianhai1; Jiang，Yan1; Xu，Dongqing2; Deng，Xing Wang1,3

2020-10-01

10.1105/tpc.20.00192

PLANT CELL   影响因子和分区

1040-4651

1532-298X

Light and the circadian clock are two essential external and internal cues affecting seedling development. COLD-REGULATED GENE27 (COR27), which is regulated by cold temperatures and light signals, functions as a key regulator of the circadian clock. Here, we report that COR27 acts as a negative regulator of light signaling. COR27 physically interacts with the CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1)–SUPPRESSOR OF PHYTOCHROME A1 (SPA1) E3 ubiquitin ligase complex and undergoes COP1-mediated degradation via the 26S proteasome system in the dark. cor27 mutant seedlings exhibit shorter hypocotyls, while transgenic lines overexpressing COR27 show elongated hypocotyls in the light. In addition, light induces the accumulation of COR27. On one hand, accumulated COR27 interacts with ELONGATED HYPOCOTYL5 (HY5) to repress HY5 DNA binding activity. On the other hand, COR27 associates with the chromatin at the PHYTOCHROME INTERACTING FACTOR4 (PIF4) promoter region and upregulates PIF4 expression in a circadian clock–dependent manner. Together, our findings reveal a mechanistic framework whereby COR27 represses photomorphogenesis in the light and provide insights toward how light and the circadian clock synergistically control hypocotyl growth.

SCI

英语

NI论文

第一

National Key R&D Program ofChina[2017YFA0503800] ; National Natural Science Foundation of China[31621001][31970258][31900210]

Biochemistry & Molecular Biology ; Plant Sciences ; Cell Biology

Biochemistry & Molecular Biology ; Plant Sciences ; Cell Biology

WOS:000595637700017

AMER SOC PLANT BIOLOGISTS

PLANT & ANIMAL SCIENCE

2-s2.0-85092681580

Scopus

1.Institute of Plant and Food Sciences,Department of Biology,Southern University of Science and Technology,Shenzhen,518055,China
2.State Key Laboratory of Crop Genetics and Germplasm Enhancement,National Center for Soybean Improvement,College of Agriculture,Nanjing Agricultural University,Nanjing,210095,China
3.State Key Laboratory of Protein and Plant Gene Research,Peking-Tsinghua Center for Life Sciences,School of Advanced Agriculture Sciences,School of Life Sciences,Peking University,Beijing,100871,China

Zhu，Wei,Zhou，Hua,Lin，Fang,et al. COLD-REGULATED GENE27 integrates signals from light and the circadian clock to promote hypocotyl growth in arabidopsis[J]. PLANT CELL,2020,32(10):3155-3169.

Zhu，Wei.,Zhou，Hua.,Lin，Fang.,Zhao，Xianhai.,Jiang，Yan.,...&Deng，Xing Wang.(2020).COLD-REGULATED GENE27 integrates signals from light and the circadian clock to promote hypocotyl growth in arabidopsis.PLANT CELL,32(10),3155-3169.

Zhu，Wei,et al."COLD-REGULATED GENE27 integrates signals from light and the circadian clock to promote hypocotyl growth in arabidopsis".PLANT CELL 32.10(2020):3155-3169.