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

文献类型: 外文期刊

第一作者: Zheng, Jian

作者: Zheng, Jian;Chen, Fengying;Wang, Zhi;Cao, Hong;Li, Xiaoying;Liu, Yongxiu;Zheng, Jian;Wang, Zhi;Deng, Xin;Soppe, Wim J. J.;Li, Yong

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

期刊名称:NEW PHYTOLOGIST ( 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.

分类号: Q94

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