文献类型： 外文期刊
作者： Yu, Guangrun 1 ; Wu, Xiaoge 1 ; Ye, Meiling 1 ; Fang, Yuan 1 ; Wang, Qiongli 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Coll Agr, Key Lab Minist Educ Genet Breeding & Multiple Util, Fuzhou 350002, Fujian, Peoples R China
2.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen,Minist Agr & Rural Affairs, Shenzhen Branch,Genome Anal Lab, Guangdong Lab Lingnan Modern Agr,State Key Lab Tro, Shenzhen, Peoples R China
关键词：
Drought stress; Histone demethylase; JmjC protein;
期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.8； 五年影响因子：5.4 ）
ISSN： 1471-2229
年卷期： 2025 年 25 卷 1 期
页码：
收录情况： SCI
摘要： BackgroundDrought-induced gene alteration is usually associated with changes of histone H3K4me3 in plants. Histone methylation homeostasis relies on the coordinated activity of methyltransferases and demethylases. We previously demonstrated that SsJMJ11 is an H3K4me3 demethylase in Saccharum spontaneum and participates in regulating flowering time. However, the role of H3K4me3 regulators in regulating drought-stress responses in sugarcane (Saccharum spp.) remains elusive.ResultsWe show that SsJMJ11 negatively regulates drought-stress responses by acting as an H3K4me3 demethylase. Ectopic overexpression of SsJMJ11 in Arabidopsis thaliana resulted in a hypersensitivity to soil drought stress as well as abscisic acid (ABA) and mannitol. Meanwhile, the drought-induced expression of AtRD20 and AtDREB2A, two well-known positive regulators of drought tolerance, was repressed by SsJMJ11 overexpression. In S. spontaneum, the ABA- and dehydration-induced transcription of SsRD20 and SsDREB2A was associated with increased H3K4me3 levels at these loci. Furthermore, transient overexpression of SsJMJ11 in S. spontaneum protoplasts reduced the ABA-induced transcription of SsRD20 and SsDREB2A, paralleling reduced H3K4me3 levels at these loci.ConclusionsOur results suggest that SsJMJ11-mediated dynamic deposition of H3K4me3 is required for proper adaptation to drought stress in sugarcane.
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