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A novel role for histone methyltransferase KYP/SUVH4 in the control of Arabidopsis primary seed dormancy

文献类型： 外文期刊

作者： Zheng, Jian 1 ; Chen, Fengying 1 ; Wang, Zhi 1 ; Cao, Hong 1 ; Li, Xiaoying 1 ; Deng, Xin 4 ; Soppe, Wim J. J. 5 ; Li, Yo 1 ;

作者机构： 1.Chinese Acad Sci, Inst Bot, Beijing Bot Garden, Beijing 100093, Peoples R China

2.China Agr Univ, Coll Landscape Architecture, Beijing 102206, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Beijing Agrobiotechnol Res Ctr, Beijing 100089, Peoples R China

4.Chinese Acad Sci, Inst Bot, Key Lab Photosynthesis & Mol Physiol, Res Ctr Plant Mol & Dev Biol, Beijing 100093, Peoples R China

5.Max Planck Inst Plant Breeding Res, Dept Plant Breeding & Genet, D-50829 Cologne, Germany

6.Univ Freiburg, Ctr Biol Syst Anal, D-79104 Freiburg, Germany

关键词： abscisic acid (ABA) signaling;chromatin modification;hstone methylation;seed dormancy;seed germination

期刊名称：NEW PHYTOLOGIST （ 2020影响因子：10.151； 五年影响因子：10.475 ）

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收录情况： SCI

摘要： Seed dormancy controls germination and plays a crucial role in the life cycle of plants. Chromatin modifications are involved in the regulation of seed dormancy; however, little is known about the underlying mechanism. KYP/SUVH4 is required for histone H3 lysine 9 dimethylation. Mutations in this gene cause increased seed dormancy. KYP/SL/VH4-overexpressing Arabidopsis plants show decreased dormancy. KYP/SUVH4 expression is regulated by abscisic acid (ABA) and gibberellins (GA). The sensitivity of seed germination to ABA and paclobutrazol (PAC) is enhanced slightly\r\kryp-tonite-2 (kyp-2) and suvh4-2/suvh5 mutants, but weakened in KYP/SL/VH4-overexpressing plants. In the kyp-2 mutant, several dormancy-related genes, including DOG1 and ABB, show increased expression levels, in agreement with a negative role for KYP/SUVH4 in gene transcription. Genetic analysis showed that DOG1 and HUB1 are epistatic to KYP/SUVH4, suggesting that these genes regulate seed dormancy in the same genetic pathway.

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