希斯脱乙酶HD2A和HD2B通过ABA进行反调节,并通过调节ABA诱导的转录抑制来调节干旱耐受性
Yongtao Han1, Amira Haouel1, Elisabeth Georgii1
1Institute of Biochemical Plant Pathology, Helmholtz Munich, 85764 Oberschleißheim, Germany.
Genes
|June 28, 2023
概括
基因组脱乙酶HD2A和HD2B通过控制ABA信号传递和生物合成来负面调节抗旱能力. 突变hd2ahd2b表现出ABA过敏性和增强的干旱耐受性.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 对基因沉默和生物过程来说,基因脱甲基化是至关重要的.
- 植物特异性基因素脱乙酶HD2s被酸 (ABA) 抑制.
- HD2A/HD2B在植物生长过程中的ABA信号传递中的作用尚不清楚.
研究的目的:
- 研究HD2A和HD2B在ABA信号和干旱反应中的功能.
- 阐明ABA通路的HD2A/HD2B介导调节背后的分子机制.
主要方法:
- 阿拉比多普西斯的突变分析 (hd2ahd2b).
- 转录组分析 (RNA-Seq).
- 染色体免疫沉降 (ChIP-Seq,ChIP-qPCR). 染色体免疫沉降 (ChIP-Seq,ChIP-qPCR). 染色体免疫沉降 (ChIP-Seq,ChIP-qPCR). 染色体免疫沉降 (ChIP-Seq,ChIP-qPCR). 染色体免疫沉降 (ChIP-Seq,ChIP-qPCR). 染色体免疫沉降 (ChIP-Seq,ChIP-qPCR). 染色体免疫沉降 (ChIP-qPCR). 染色体免疫沉降 (ChIP-Seq,ChIP-qPCR). 染色体免疫沉降 (ChIP-Seq,ChIP-qPCR).
- 生理分析 (发芽,口腔孔径,ROS含量).
主要成果:
- hd2ahd2b突变体表现出ABA过敏性和增强的抗干旱能力.
- 全球H4K5ac水平在hd2ahd2b植物中是上调调的,具有重新编程的ABA响应基因转录.
- HD2A和HD2B直接与ABA响应基因结合,并通过在NCED9.9处 deacetylatingH4K5ac抑制ABA生物合成.
结论:
- HD2A和HD2B通过调节ABA信号和生物合成,作为抗干旱的负调节剂.
- 这些基因组脱乙酶在植物适应非生物压力的过程中起着重要作用.
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