取决于温度的jumonji脱甲基酶通过准Brassica rapa中的H3K36me2/3来调节开花时间
Xiaoyun Xin1,2,3,4, Peirong Li1,2,3,4, Xiuyun Zhao1,2,3,4
1State Key Laboratory of Vegetable Biobreeding, Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Science, Beijing, China.
Nature communications
|June 27, 2024
概括
一个关键的基因BrJMJ18通过调节开花时间和叶绿素生产来增强作物对热应激的抵抗力. 这种基因组修饰发现为适应Brassica rapa应对全球变暖提供了新的策略.
科学领域:
- 植物生物学 植物生物学
- 遗传学 是一个遗传学.
- 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:
- 全球变暖显著影响作物开花时间和产量.
- 基质子修饰对于植物温度可塑性至关重要,但它们在息地适应中的调节因素仍然不清楚.
研究的目的:
- 鉴定调节热能耐受性基因的基因 调节热能耐受性基因 在Brassica rapa.
- 研究BrJMJ18在依赖温度的生长和应力适应中的作用.
主要方法:
- 全基因组模式分析和定量特征位置 (QTL) 映射.
- 过度表达和CRISPR/Cas9突变的Brassica rapa植物的特征.
- 染色体免疫沉测序 (ChIP-seq) 和转录组分析.
主要成果:
- BrJMJ18被确定为热耐受性的候选基因.
- 来自B. rapa亚种的BrJMJ18等位基因. 华人种 (Chinensis) 种类 (var. 种类) 帕拉辛尼斯 (Par) 影响了花期和生长温度的依赖性.
- 在热应激下,BrJMJ18调节BrFLC3的表达,并调节叶绿素生物合成.
- 三种氨基酸突变可能解释了Brassica rapa亚种之间的功能差异.
结论:
- BrJMJ18作为H3K36me2/3脱甲基酶,增强Brassica rapa对热应激的弹性.
- 这种表观遗传调节器在正常条件下改善了植物的适应性,而不会影响农学特征.
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