草 (Fragaria vesca) 热应激记忆的表观基因和转录基因持续性
María-Estefanía López1,2, Béatrice Denoyes3, Etienne Bucher4
1Crop Genome Dynamics Group, Agroscope, Nyon, 1260, Switzerland.
BMC plant biology
|May 15, 2024
概括
林地草植物可以通过无性繁殖传递热应激诱导的表观遗传变化至少三代. 这种分子记忆可能有助于植物适应环境变化.
科学领域:
- 植物表观遗传学 植物表观遗传学
- 分子生物学分子生物学
- 压力生理学 压力生理学
背景情况:
- 植物的表观遗传压力记忆通常是短暂的.
- 森林草 (Fragaria vesca) 为研究遗传提供了性和无性繁殖模式.
- 研究草中热应激诱导的DNA甲基化遗传性.
研究的目的:
- 评估Fragaria vesca中热应激诱导的表观遗传和转录基因变化的遗传性.
- 确定DNA甲基化变化是否通过无性繁殖传播.
- 探索表观遗传记忆在植物应激适应中的作用.
主要方法:
- 全基因组DNA甲基化分析.
- 转录基因分析.转录基因分析.
- 在几代人中无性繁殖.
主要成果:
- 在至少三个无性世代中,特定的DNA甲基化标记 (表皮转移) 的稳定传播.
- 一些表皮突变与转录性变化在热应激后的关联.
- 在无性后代中独立获得和继承相同的表皮.
结论:
- 草甲基组和转录组在应对热应激时表现出灵活性.
- 无性后代保留了祖先过去压力的分子记忆.
- 表观遗传可能有助于功能可塑性和适应气候的植物育种.
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