在随机水应力下,进化性权衡形成了象素体的形状,对干旱的脆弱性
Ross M Deans1, Patrick Meir1, Roderick C Dewar2,3
1School of GeoSciences, University of Edinburgh, Edinburgh EH9 3FF, United Kingdom.
概括
植物体对干旱的脆弱性是生存的关键. 最佳阻力平衡水运,建筑成本和压力可能性,影响气候变化中的死亡风险.
科学领域:
- 植物生理学 植物生理学
- 进化生物学是进化的生物学.
- 干旱压力生态学 干旱压力生态学
背景情况:
- 干旱下的植物死亡通常是由于对水运输系统 - - 树枝的损伤造成的.
- 石对随机水应激的抵抗的进化基础尚未得到充分理解.
- 现有的理论缺乏一个框架来优化在变化的干旱条件下树的脆弱性.
研究的目的:
- 开发一个理论,为水应激的最佳膜脆弱性.
- 为了平衡碳增量,西体建设成本和干旱风险之间的权衡.
- 为了了解体抗旱能力的进化出现和变化.
主要方法:
- 在随机水应力下开发了最佳膜脆弱性的理论模型.
- 分析了涉及水运输的权衡,木建筑成本和干旱可能性.
- 液压安全指标的比较 (液压安全指数与液压安全差距).
主要成果:
- 随着水应激的增加,最佳的树皮脆弱性会增加,从而提高用水效率.
- 增加的电阻可以悖论地增加完全细胞失效的机会,尽管安全边际更大.
- 吉姆诺精子表现出比血管精子更大的液压安全性,这是由于高压力西伦的成本较低.
- 在快速变化的气候下,寿命较长的叶面临更高的死亡风险.
结论:
- 水应力的随机框架提供了比单独的液压安全边际更准确的液压故障预测.
- 液压安全指数与气候变化相结合,可以更好地了解植物干旱风险.
- 了解适应性树枝膜脆弱性对于预测植物对气候变化和干旱的反应至关重要.
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