希斯脱乙酶调节更多的辅助分支的阿拉比多普西斯塔利亚纳的双依赖发芽
Arne Temmerman1,2, Annick De Keyser1,2, François-Didier Boyer3
1Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, Gent 9052, Belgium.
Plant & cell physiology
|June 6, 2023
概括
阿拉比多普西斯种子的发芽是由KARRIKERIN INSENSITIVE 2 (KAI2) 途径调节的,这涉及SMAX1抑制剂的降解. 这项研究确定了包括HDA6在内的基因素脱乙酶对于这种MAX2依赖的发芽过程至关重要.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 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:
- 阿拉比多普西斯·塔利亚纳种子的发芽是由KARRIKERIN INSENSITIVE 2 (KAI2) 信号通路控制的.
- 这一途径需要SMAX1抑制蛋白的MAX2依赖性降解.
- 假设SMAX1通过组织基因脱乙酶招募作为转录抑制剂起作用.
研究的目的:
- 为了研究素脱乙酶在阿拉比多普西斯种子中MAX2依赖的种子发芽中的作用.
- 为了确定基因素脱乙酶HDA6,HDA9,HDA19和HDT1.1.的特定参与.
主要方法:
- 对缺少特定基因素脱乙酶的阿拉比多普西斯突变物进行遗传分析.
- 在karrikin或rac-GR24处理下评估种子发芽率.
- 在对rac-GR24的反应中对DWARF14-LIKE2 (DLK2) 的基因表达分析.
主要成果:
- 基因素脱乙酶HDA6,HDA9,HDA19和HDT1都参与了MAX2依赖的种子发芽.
- 在rac-GR24处理时,HDA6对于诱导DWARF14-LIKE2表达至关重要.
- 这表明基因脱乙酶在调节KAI2信号的下游基因表达中的作用.
结论:
- 歇斯脱乙酶在KAI2信号通路中发挥着关键作用,控制了Arabidopsis种子的发芽.
- HDA6 特别介导DLK2表达的诱导,将表观遗传调节与strigolactone信号传递联系起来.
- 这些发现阐明了植物激素信号传递和发芽的表观遗传控制中的新机制.
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