分子植物（英文版）

Lijuan Qi12; Shan Liu9; Cong Li7; Jingying Fu10; Yanjun Jing8; Jinkui Cheng11; Hong Li; Dun Zhang; Xiaoji Wang; Xiaojing Dong; Run Han; Bosheng Li; Yu Zhang; Zhen Li; William Terzaghi; Chun-Peng Song; Rongcheng Lin; Zhizhong Gong; Jigang Li

2020

Molecular Plant   影响因子和分区

1674-2052

PHYTOCHROME-INTERACTING FACTORS (PIFs) are a group of basic helix-loop-helix transcription factors that can physically interact with photoreceptors,including phytochromes and cryptochromes.It was previously demonstrated that PIFs accumulated in darkness and repressed seedling photomorphogenesis,and that PIFs linked different photosensory and hormonal pathways to control plant growth and development.In this study,we show that PIFs positively regulate the ABA signaling pathway during the seedling stage specifically in darkness.We found that PIFs positively regulate ABI5 transcript and protein levels in darkness in response to exogenous ABA treatment by binding directly to the G-box motifs in the ABI5 promoter.Consistently,PIFs and the G-box motifs in theABI5 promoter determineABI5 expression in darkness,and overexpression of ABI5 could rescue the ABA-insensitive phenotypes ofpifq mutants in the dark.Moreover,we discovered that PIFs can physically interact with the ABA receptors PYL8 and PYL9,and that this interaction is not regulated by ABA.Further analyses showed that PYL8 and PYL9 promote PIF4 protein accumulation in the dark and enhance PIF4 binding to the ABI5 promoter,but negatively regulate PIF4-mediated ABI5 activation.Taken together,our data demonstrate that PIFs interact with ABA receptors to orchestrate ABA signaling in darkness by controlling ABI5 expression,providing new insights into the pivotal roles of PIFs as signal integrators in regulating plant growth and development.

Arabidopsis transcription factor PIFs ABA ABI5 darkness

英语

其他

(This work was supported by grants from the National Natural Science Foundation of China )%(the Ministry of Agriculture of China for Transgenic Research )%Beijing Outstanding University Discipline Program,and the Recruitment Program of Global Youth Experts of China

PLANT & ANIMAL SCIENCE

WanFang

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1.State Key Laboratory of Plant Physiology and Biochemistry,College of Biological Sciences,China Agricultural University,Beijing 100193,China
2.Key Laboratory of Photobiology,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China
3.Institute of Plant and Food Science,Department of Biology,Southern University of Science and Technology,Shenzhen,Guangdong 518055,China
4.Department of Plant and Microbial Biology,University of California,Berkeley,CA 94720,USA;Plant Gene Expression Center,Agriculture Research Service,U.S.Department of Agriculture,Albany,CA 94710,USA
5.Department of Biology,Wilkes University,Wilkes-Barre,PA 18766,USA
6.Institute of Plant Stress Biology,Collaborative Innovation Center of Crop Stress Biology,Henan University,Kaifeng 475001,China
7.中国农业大学
8.中国科学院植物研究所
9.南方科技大学
10.加利福尼亚大学
11.威尔克斯大学
12.河南大学

Lijuan Qi,Shan Liu,Cong Li,等. 分子植物（英文版）[J]. Molecular Plant,2020,13(3):414-430.

Lijuan Qi.,Shan Liu.,Cong Li.,Jingying Fu.,Yanjun Jing.,...&Jigang Li.(2020).分子植物（英文版）.Molecular Plant,13(3),414-430.

Lijuan Qi,et al."分子植物（英文版）".Molecular Plant 13.3(2020):414-430.