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Counteraction of ABA-Mediated Inhibition of Seed Germination and Seedling Establishment by ABA Signaling Terminator in Arabidopsis
Wang, Zhijuan1; Ren, Ziyin1; Cheng, Chunhong2,3,7; Wang, Tao2,8; Ji, Hongtao1; Zhao, Yang4,5; Deng, Zhiping6; Zhi, Liya2; Lu, Jingjing1; Wu, Xinying1; Xu, Shimin1; Cao, Mengmeng2; Zhao, Hongtao2,9; Liu, Liu2,3; Zhu, Jiankang4,5; Li, Xia1
First AuthorWang, Zhijuan
Correspondent Emailxli@mail.hzau.edu.cn (xia li )
Contribution Rank8
Abstract

Seed germination and seedling establishment are important for the reproductive success of plants, but seeds and seedlings typically encounter constantly changing environmental conditions. By inhibiting seed germination and post-germinative growth through the PYR1/PYL/RCAR ABA receptors and PP2C co-receptors, the phytohormone abscisic acid (ABA) prevents premature germination and seedling growth under unfavorable conditions. However, little is known about how the ABA-mediated inhibition of seed germination and seedling establishment is thwarted. Here, we report that ABA Signaling Terminator (ABT), a WD40 protein, efficiently switches off ABA signaling and is critical for seed germination and seedling establishment. ABT is induced by ABA in a PYR1/PYL/RCAR-PP2C-dependent manner. Overexpression of ABT promotes seed germination and seedling greening in the presence of ABA, whereas knockout of ABT has the opposite effect. We found that ABT interacts with the PYR1/PYL/RCAR and PP2C proteins, interferes with the interaction between PYR1/PYL4 and ABI1/ABI2, and hampers the inhibition of ABI1/ABI2 by ABA-bound PYR1/PYL4, thereby terminating ABA signaling. Taken together, our results reveal a core mechanism of ABA signaling termination that is critical for seed germination and seedling establishment in Arabidopsis.

KeywordABA ABT ABA signaling PYR1/PYL/RCAR-ABA-PP2Cs complex seed germination post-germinative development
2020-09-07
Language英语
DOI10.1016/j.molp.2020.06.011
Source PublicationMOLECULAR PLANT
ISSN1674-2052
Volume13Issue:9Pages:1284-1297
Subtype实证研究
Indexed BySCI
Funding ProjectNational Key Research and Development Program of China[2016YFA0500503] ; Fundamental Research Funds for the Central Universities[2662018PY075] ; National Natural Science Foundation of China[31730066] ; National Natural Science Foundation of China[91540112] ; Huazhong Agricultural University's Scientific and Technological Self-innovation Foundation[2015RC014]
PublisherCELL PRESS
WOS KeywordPHOSPHATASES TYPE 2C ; PROTEIN PHOSPHATASES ; ACID ; TRANSDUCTION ; DEGRADATION ; STRESS ; ABI1 ; RECEPTORS ; KINASES ; PATHWAY
WOS Research AreaBiochemistry & Molecular Biology ; Plant Sciences
WOS SubjectBiochemistry & Molecular Biology ; Plant Sciences
WOS IDWOS:000566895400014
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.psych.ac.cn/handle/311026/32851
Collection中国科学院心理健康重点实验室
Corresponding AuthorLi, Xia
Affiliation1.Huazhong Agr Univ, Coll Plant Sci & Technol, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Hubei, Peoples R China
2.Chinese Acad Sci, Ctr Agr Resources Res, Inst Genet & Dev Biol, Shijiazhuang 050021, Hebei, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Shanghai Ctr Plant Stress Biol, Shanghai Inst Biol Sci, Shanghai 200032, Peoples R China
5.Purdue Univ, Dept Hort & Landscape Architecture, W Lafayette, IN 47907 USA
6.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 3210021, Zhejiang, Peoples R China
7.Yangtze Normal Univ, Coll Life Sci & Technol, Chongqing, Peoples R China
8.Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing, Peoples R China
9.Hebei Normal Univ, Coll Life Sci, Shijiazhuang 050024, Hebei, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zhijuan,Ren, Ziyin,Cheng, Chunhong,et al. Counteraction of ABA-Mediated Inhibition of Seed Germination and Seedling Establishment by ABA Signaling Terminator in Arabidopsis[J]. MOLECULAR PLANT,2020,13(9):1284-1297.
APA Wang, Zhijuan.,Ren, Ziyin.,Cheng, Chunhong.,Wang, Tao.,Ji, Hongtao.,...&Li, Xia.(2020).Counteraction of ABA-Mediated Inhibition of Seed Germination and Seedling Establishment by ABA Signaling Terminator in Arabidopsis.MOLECULAR PLANT,13(9),1284-1297.
MLA Wang, Zhijuan,et al."Counteraction of ABA-Mediated Inhibition of Seed Germination and Seedling Establishment by ABA Signaling Terminator in Arabidopsis".MOLECULAR PLANT 13.9(2020):1284-1297.
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