在干旱和热压力相结合的情况下,中粒细胞的导电性限制了光合作用在波动的光线下
Zhi-Lan Zeng1,2, Xiao-Qian Wang1, Shi-Bao Zhang1
1Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
Plant physiology
|November 13, 2023
概括
干旱和炎热等复合气候极端因素严重影响作物光合作用. 准美索菲尔导电性对于改善面临这些综合压力的作物中的动态光合作用至关重要.
科学领域:
- 植物生理学 植物生理学
- 气候变化生物学
- 农业科学 农业科学
背景情况:
- 干旱和热压力经常同时发生,气候变化加剧了这种情况.
- 复合气候极端对农业产生协同影响,超过个人压力.
- 在联合应力下影响动态光合作用的机制尚未完全理解.
研究的目的:
- 评估单个和联合干旱和热压力对番茄动态光合作用的影响.
- 为了确定光合作用在这些压力条件下的限制因素.
主要方法:
- 番茄 (Solanum lycopersicum) 苗木受到单独和联合的干旱和热压力.
- 在波动的光线条件下测量了动态光合作用.
主要成果:
- 个体干旱压力有限的CO2扩散导电性;热压力有限的生物化学.
- 干旱和热应激的结合主要限制了美索菲尔导电性.
- 与对照组相比,光合作用碳增益减少了38% (干旱),73% (热量) 和114% (组合).
结论:
- 复合气候极端因素显著减少动态光合作用比个人压力更大.
- 中粒细胞的导电性是限制光合作用在干旱和高温条件下的关键因素.
- 改善美索菲尔导电性和动态光合作用对于作物对极端气候的适应性至关重要.
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