在玉米中通过N6-甲基氨酸DNA甲基化介导的热应激反应
Weijun Guo1, Liang Le1, Daolei Zhang2
1Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Cell reports
|July 29, 2025
概括
玉米中的N6-甲基氨酸 (6mA) 含量随着热应激而变化,影响基因表达和植物耐受性. 研究人员确定了一种关键的酶,ZmALKBH1,参与了这个过程,为改善作物耐热性提供了目标.
科学领域:
- 植物生物学 植物生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 农作物科学 农作物科学
背景情况:
- N6-甲基氨酸 (6mA) 对于真核生物的发育和应激反应至关重要.
- 它在作物耐热性,特别是热应激 (HS) 的玉米中所起的具体作用尚不清楚.
研究的目的:
- 在热应激下,研究6mA在玉米杂交系 (B73和Mo17) 的动态.
- 阐明6mA在调节基因表达和耐热性中的作用.
- 确定提高玉米耐热性的潜在目标.
主要方法:
- 在玉米杂交系中进行全基因组6mA剖析.
- 分析6mA分布与基因和可移植元素 (TE) 表达的关系.
- 对6mA脱甲基酶 (ZmALKBH1) 的鉴定和功能分析.
- 开发和验证一个深度学习模型,用于预测6mA分布和HS反应.
主要成果:
- 玉米中的6mA水平和模式与热应激反应相关.
- 6mA富含促进体,基因间区域和TEs,与表达相反相关.
- 耐热线在HS下表现出6mA的升高,关键的HS基因有差异性模式.
- ZmALKBH1充当6mA脱甲基酶,其突变可以提高HS耐受性.
- 一个深度学习模型准确地预测了不同玉米系的6mA分布和HS响应.
结论:
- 6mA表观遗传学在转录调节玉米适应热应激方面发挥着重要作用.
- ZmALKBH1是影响热耐受性的6mA动态的一个关键调节器.
- 了解6mA为开发适应气候变化的玉米品种提供了新的目标.
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