自然存在的类和它们在树中应对气候变化的作用
Bowei Chen1,2,3, Tianxu Zhang4, Yile Guo5
1Institute of Carbon Neutrality, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Ecology, Northeast Forestry University, Harbin, China.
Molecular ecology
|July 21, 2025
概括
表观遗传学在植物如何适应气候变化方面发挥着关键作用. 这项研究表明,白树的表观遗传变化通常独立于遗传学,并与气候变量有关,突显了它们的脆弱性.
科学领域:
- 植物表观遗传学 植物表观遗传学
- 适应气候变化 适应气候变化
- 森林生态森林生态学
背景情况:
- 表观遗传学使植物能够适应环境变化,有时独立于遗传变异.
- 表观遗传学在森林树木适应全球气候变化的作用仍未得到充分研究.
- 白树 (Betula platyphylla) 是一个对全球变暖敏感的关键先驱物种.
研究的目的:
- 为了研究白树从遗传变异中脱离表观遗传的程度.
- 评估表观遗传学对白树适应气候变化的贡献.
- 为了确定与气候变量相关的潜在基基,并预测物种脆弱性.
主要方法:
- 高质量的基因组组装 贝图拉白.
- 跨48个自然来源的多omics测序.
- 全基因组关联研究 (GWAS) 以确定差异甲基化区域 (DMR) 和表位基因.
- 梯度建模整合了表观基因组和生物气候数据.
主要成果:
- 超过55%的DMR是自发的,独立于遗传因素.
- 超过30%的自发性DMR与基因表达 (epialleles) 有关,主要是代谢和应激反应.
- 1819个代基 (气候代基,cEpialleles) 与生物气候变量有显著的关联.
- 高海拔/高度的白树种群可能对未来的气候变化很脆弱.
结论:
- 表观遗传修饰对于植物适应气候波动至关重要.
- 白树的自发性基与气候变量有关,这表明了适应潜力.
- 综合表观基因和气候数据对于预测森林物种适应气候变化的能力至关重要.
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