干旱耐受性作为一种进化先驱,在草中耐受和冬天
Laura Schat1,2, Marian Schubert1,2, Siri Fjellheim3
1Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
Evolution; international journal of organic evolution
|January 18, 2025
概括
干旱耐受性可能不会在草 (Poaceae) 中始终先于耐受性. 进化路径各不相同,这表明草适应寒冷或干燥的条件,可能是由于权衡.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 植物科学 植物科学
背景情况:
- 生物群正在转变,热带到温带的过渡越来越频繁.
- 前体特征可能有助于这些生物组转变.
- 植物中重叠的干旱和的压力反应的进化起源尚不清楚.
研究的目的:
- 调查祖先的干旱适应是否促进了草 (Poaceae) 的/冬季耐受性.
- 为了探索干旱和寒冷耐受性在草的进化轨迹.
主要方法:
- 用Köppen-Geiger气候区对干旱,和/或冬季耐受性进行分类的草种.
- 采用了比较分析和祖先状态重建.
- 利用干旱和/冬季耐受性的同时建模.
主要成果:
- 祖先状态的重建显示出不同的进化路径 (干旱-第一个和-第一个场景).
- 同时建模表明了一些相关的进化,但干旱敏感的血统中/冬季耐受性增长的比率更高.
- 有限的证据支持干旱耐受性作为草中耐寒/冬季耐受性的普遍前体.
结论:
- 草表现出各种各样的进化策略,以承受压力.
- 不同的分类表现出不同的适应途径,导致对寒冷或干旱耐受性的专业化.
- 应激耐受反应之间的权衡可能会推动这些不同的进化结果.
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