干旱诱导的转子体表达揭示了Brassica napus中复杂的干旱反应机制
Manyi Chen1, Dan Luo2, Hanzhao Kong1
1Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment, Guangdong University of Petrochemical Technology, Maoming, China.
Frontiers in plant science
|August 7, 2025
概括
在干旱压力下的种子发育过程中,Brassica napus中的可转移元素 (TE) 显示出显著的转录活性. 这些TEs产生新的蛋白质编码和非编码RNA,有助于干旱耐受性和种子发芽.
科学领域:
- 植物基因组学和分子生物学
- 表观遗传学和基因组调节
- 植物应激生理学 植物应激生理学
背景情况:
- 可转移元素 (TE) 在植物基因组中普遍存在,但它们的作用,特别是在压力下,尚不清楚.
- 了解TE转录动态对于破译它们对植物适应和发展的贡献至关重要.
- 布拉西卡纳普斯 (B. napus) 是面临干旱等环境挑战的重要作物.
研究的目的:
- 调查在干旱压力下种子发育期间B. napus中TEs的转录活性.
- 为了识别TE衍生的蛋白质编码转录和参与应激反应的长非编码RNA (lncRNAs).
- 探索这些TE衍生分子在干旱耐受性和种子发芽中的潜在作用.
主要方法:
- 野生类型和BnaABI5 CRISPR突变B. napus线的RNA测序 (RNA-seq) 分析.
- 开发一个用于识别和表征TE衍生的转录 (蛋白质编码和lncRNAs) 的计算管道.
- 蛋白质编码TE转录的功能注释和在干旱压力下的差异表达分析.
主要成果:
- 在B. napus基因组中发现了17547个转录活性TEs,产生15808个蛋白质编码转录和1739个lncRNA.
- 预测了来自转子子区域的860个新基因,可能参与单碳酸代谢.
- 在干旱压力期间,128个编码蛋白质的TE转录和37个lncRNAs被差异地表达,其中特定的lncRNAs调节干旱耐受性基因.
结论:
- 在干旱压力下,TE转录在B. napus种子发育中发挥着功能性作用.
- TE衍生基因和lncRNAs可以作为植物应激反应的新型调节者.
- 这些发现提供了对 TE 生物学的洞察力,并为繁殖抗旱 B. napus 品种提供了潜在的目标.
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