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从常规气体交换测量中估计叶子日呼吸
Xinyou Yin1, Jeffrey S Amthor2
1Centre for Crop Systems Analysis, Department of Plant Sciences, Wageningen University & Research, PO Box 430, 6700 AK, Wageningen, the Netherlands.
The New phytologist
|October 20, 2023
概括
叶子日呼吸 (Rd) 对于植物碳利用至关重要. 新的方法通过解决光合作用干扰和再同化来改善测量,提供了对Rd.的更清晰理解.
科学领域:
- 植物生理学 植物生理学
- 生态生态学 生态生态学
- 生物化学 生物化学
背景情况:
- 叶子日呼吸 (Rd) 显著影响植物碳利用效率和全球碳循环.
- 由于暴露在光线下的叶子同时进行光合作用,精确测量Rd具有挑战性.
研究的目的:
- 审查传统方法测量叶子日呼吸 (Rd) 的局限性.
- 为了突出Rd测量技术的最新进展.
- 将质细胞代谢的新发现纳入Rd的理解.
主要方法:
- 批判性地评估Rd估计的Kok和Laisk方法的理论基础.
- 讨论结合叶绿素光数据的改进.
- 纳入光合作用重吸收呼吸CO2的作用.
- 考虑质体中氧化酸盐酸盐路径的证据.
主要成果:
- 传统的方法 (Kok,Laisk) 对于精确的Rd测量具有固有的理论限制.
- 整合叶绿素光和计算二氧化碳再吸收,可以提高Rd的估计.
- 氧化酸路径在白天CO2和能量释放中的作用越来越被认为是至关重要的.
结论:
- 改进的方法对于准确量化叶子日呼吸 (Rd) 非常重要.
- 了解Rd需要考虑光合作用再吸收和叶绿体代谢途径.
- 准确的Rd数据对于建模植物和生态系统碳动态至关重要.
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