无性繁殖期间的温度升高会导致甲基组,转录组和Fragaria vesca生态型的持久表型变化
YuPeng Zhang 张宇鹏1,2, Guangxun Fan3, Tuomas Toivainen3
1EVOGENE, Department of Biosciences, University of Oslo, 0313 Oslo, Norway.
Horticulture research
|September 18, 2023
概括
植物可以通过表观遗传记忆来适应变暖. 这项研究表明,更高的温度诱导了Fragaria vesca的持久变化,与DNA甲基化模式和基因表达有关,有助于适应.
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.
- 适应气候变化 适应气候变化
背景情况:
- 植物需要快速适应全球变暖的机制来保持健康.
- 表观遗传记忆为快速适应气候变化提供了一个潜在的途径.
研究的目的:
- 为了研究多年生Fragaria vesca如何适应更高的温度 (28°C对18°C) 在三个无性世代.
- 确定表观遗传记忆,特别是DNA甲基化在这种适应过程中的作用.
主要方法:
- 在受控温度条件下,研究了来自不同地理位置的Fragaria vesca生态型.
- 分析了几代人的表型特征 (开花时间,石头数,树枝长度) 和DNA甲基化模式 (甲基组).
- 研究基因表达变化及其与甲基化模式和重复元素的相关性.
主要成果:
- 温度升高导致生态类型的花期,花数量和花长度持续的表型变化.
- 在DNA甲基化中观察到显著的差异和共同的模式,主要是在CHG环境中,在更高的温度下进行过甲基化.
- 对于参与花期和表观遗传调节的基因,确定了生态类型特定的甲基化和表达模式,基因表达和附近的重复元素之间存在负相关性.
结论:
- 持久的表型变化,标志着表观遗传记忆,是由Fragaria vesca.的温度升高引起的.
- 这些表型变化伴随着DNA甲基化变化,这表明在气候变化适应的一般和生态型特异性适应中发挥了作用.
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