在植物中,生理学寒冷耐受性比气候更快地发展
Yin Wen1, Qing Ye1,2, Cristian Román-Palacios3
1Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.
Frontiers in plant science
|September 25, 2023
概括
植物对寒冷的生理耐受性比热耐受性发展得更快,但比它们的气候位变化要慢. 这表明植物可能会与温度升温作斗争,影响灭绝预测.
科学领域:
- 植物进化生物学 植物进化生物学
- 气候变化生态学 气候变化生态学
- 生理适应 生理适应
背景情况:
- 预测植物对气候变化的反应需要了解热应激适应.
- 植物生理耐受性与气候的进化速率尚不清楚.
- 为了评估这些进化动态,需要研究遗传学上的比较方法.
研究的目的:
- 为了比较生理温度耐受性的进化速率与血管植物的气候利基变化.
- 调查硬化对生理和利基进化之间的关系的影响.
- 评估植物对预计气候变化的脆弱性,特别是温度升高.
主要方法:
- 在三个主要的血管植物群体中进行了植物遗传学比较分析.
- 对生理学寒冷和热耐受性进化速率的量化.
- 对最冷和最温暖的气候利基温度的进化速率的评估.
- 在分析生理和利基比率关联中包括硬化效应.
主要成果:
- 在所有研究的植物群体中,生理寒冷耐受性比热耐受性发展得更快.
- 最寒冷的气候利基温度的进化速度超过了最温暖的温度.
- 生理学寒冷耐受性的进化速率比气候利基变化更快.
- 在非硬化植物中,在生理寒冷耐受性和气候利基转移之间发现了反向关联.
结论:
- 植物在耐寒性和最冷的利基温度方面表现出更快的进化,而不是耐热性和最温暖的利基温度.
- 耐热性的进化速度较慢表明对温度升高的潜在敏感性.
- 这些发现对建模气候相关植物灭绝有重大影响.
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