AFP2 as the novel regulator breaks high-temperature-induced seeds secondary dormancy through ABI5 and SOM in Arabidopsis thaliana
Chang, Guanxiao1,2; Wang, Chuntao1; Kong, Xiangxiang1; Chen, Qian1; Yang, Yongping1; Hu, Xiangyang1,3
2018-06-18
发表期刊BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
ISSN0006-291X
卷号501期号:1页码:232-238
摘要Imbibed seeds monitor environmental and endogenous signals to break dormancy and initiate growth under appropriate conditions. In Arabidopsis thaliana, high temperature (HT) induces secondary seed dormancy, but the underlying mechanism remains unclear. In this study, we found that the abi5-1 mutant was insensitive to high temperature, whereas plants overexpressing ABI5 displayed sensitivity. We then identified ABA-insensitive five-binding protein 2 (AFP2), which interacts with ABI5 and is involved in HT-induced secondary seed dormancy. Under HT stress, the loss-of-function afp2 mutant showed lower seeds germination frequency, reversely, AFP2 overexpressing lines (OE-AFP2) showed high germination frequency. Similar to the abi5 mutant, the crossed OE-AFP2 abi5 or afp2 abi5 lines showed high germination under HT, suggesting that ABI5 is epistatic to AFP2. SOM is reported to negatively regulate seeds germination by altering GA/ABA metabolism, here we found that AFP2 and ABI5 altered SOM transcription. Specifically, overexpressing AFP2 suppressed SOM transcription, resulting in high expression of GA biosynthesis-related genes and low expression of ABA biosynthesis-related genes, ultimately promoting seed germination under HT. Thus, our data demonstrate that AFP2 is a novel regulator to control HT-induced secondary seed dormancy through ABI5 and SOM. (C) 2018 Elsevier Inc. All rights reserved.
关键词Arabidopsis Afp2 Abi5 High Temperature Seed Germination Som
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/61356
专题中国科学院东亚植物多样性与生物地理学重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Div & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Shanghai Univ, Sch Life Sci, Plant Sci Ctr, Shanghai Key Lab Bioenergy Crops, Shanghai 200444, Peoples R China
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Chang, Guanxiao,Wang, Chuntao,Kong, Xiangxiang,et al. AFP2 as the novel regulator breaks high-temperature-induced seeds secondary dormancy through ABI5 and SOM in Arabidopsis thaliana[J]. BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS,2018,501(1):232-238.
APA Chang, Guanxiao,Wang, Chuntao,Kong, Xiangxiang,Chen, Qian,Yang, Yongping,&Hu, Xiangyang.(2018).AFP2 as the novel regulator breaks high-temperature-induced seeds secondary dormancy through ABI5 and SOM in Arabidopsis thaliana.BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS,501(1),232-238.
MLA Chang, Guanxiao,et al."AFP2 as the novel regulator breaks high-temperature-induced seeds secondary dormancy through ABI5 and SOM in Arabidopsis thaliana".BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS 501.1(2018):232-238.
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