干旱引起的适应性代际可塑性提高了冬季小麦 (Triticum aestivum L.) 的谷物产量
Baoru Li1,2, Jie Han3, Huijie Gu1
1The Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, The Chinese Academy of Sciences, Shijiazhuang, Hebei, China.
Plant, cell & environment
|December 17, 2025
概括
父母干旱初始化可以提高冬季小麦后代的产量和抗旱能力. 这种适应性的代际可塑性是由表观遗传重编程和改进的资源分配驱动的,为作物适应提供了一个有希望的战略.
科学领域:
- 植物生物学 植物生物学
- 农业学是一种农业学.
- 遗传学 遗传学 是一个
背景情况:
- 代际可塑性,即父母影响后代特征,对于作物适应环境压力至关重要.
- 了解父母环境诱导和后代适应的机制对于提高作物弹性至关重要.
研究的目的:
- 在干旱条件下系统评估冬季小麦的代际可塑性.
- 阐明在小麦干旱抗性基础上的诱导和适应机制.
主要方法:
- 进行了多季度土壤和田间实验.
- 整合了多种组学分析 (基因组学,转录组学,表观组学) 来研究分子机制.
- 在不同的干旱情景和小麦品种中评估了生理和产量参数.
主要成果:
- 在严重的干旱下,游戏生成期间的父母干旱显著增加了33%的后代谷物产量.
- 冬季小麦品种JM22表现出最强的适应性代际可塑性,在父母干旱初始化后,增加了10.5%的田间产量.
- 两代干旱暴露使得产量增加到15.2%,得到了增强的同化物运输,延迟叶子衰老,改善根的可塑性和更高的用水效率的支持.
- 全基因组DNA低甲基化和转录基因重编程被确定为推动增强性的关键表观遗传机制.
结论:
- 小麦的适应性代际可塑性是适应干旱的可行策略.
- 这种可塑性涉及到资源重新分配战略,平衡干旱防御和生殖增长.
- 表观遗传机制,特别是DNA低甲基化和转录组重编程,在几代人中巩固了适应性特征.
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