The compensation effect between safety and efficiency in xylem and role in photosynthesis of gymnosperms
The compensation effect between safety and efficiency in xylem and role in photosynthesis of gymnosperms
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木质部安全与效率的补偿效应及其在裸子植物光合作用中的作用
DOI：
10.1111/ppl.13617
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发表时间：
2022
影响因子：
6.4
通讯作者：
Jiang-Bo Xie
中科院分区：
文献类型：
--
作者：
Zhong-Yuan Wang;Xiaoran Ding;Yan Li;Jiang-Bo Xie
安全-效率权衡的经典理论是植物科学中的一个共同主题。尽管安全性和效率在生理上部分地相互补偿（也就是说，从整个生物体的角度来看，在性状之间存在补偿效应CE），但它们总是在数学上被描述为相互权衡。然而，补偿效应从来没有被定义和量化，更不用说它在木质部水分运输和随后的光合作用中的作用。在这里，我们开发了一种替代理论，将CE定义为安全性和效率之间的正相关关系，并进一步定义了一个新的权衡指数，濑户，表示为CE乘以权衡因子（不同于经典的平均权衡值）。然后，我们测试了濑户-和CE-光合速率的关系，在不同的水平的基础上，一个共同的花园实验，使用9种针叶树和裸子植物公布的数据。结果表明，木质部功能的补偿效应是促进光合速率从种到门尺度的主导力量。通过将补偿效应整合到木质部水力功能策略中，我们的研究清楚地表明，补偿效应是木质部水力和光合生理协调的进化基础。
The classical theory of safety-efficiency trade-off is a common theme in plant sciences. Despite safety and efficiency partly compensating for each other physiologically (namely, there is a compensation effect, CE, among traits from the whole organism perspective), they are always mathematically described as a trade-off against one another. However, the compensation effect has never been defined and quantified, let alone its role in the xylem water transport and subsequently photosynthesis. Here, we developed an alternative theory to define the CE as a positive relationship between safety and efficiency, and further define a new trade-off index, SETO, that is expressed as CE multiplied by a trade-off factor (differing from the classical average trade-off value). Then, we tested SETO- and CE-photosynthetic rate relationships across different levels based on a common garden experiment using nine conifers and published data for gymnosperms. The results demonstrated that the compensation effect in xylem functions was the dominant force in facilitating photosynthetic rates from species- to phylum-scale. By integrating the compensation effect into the xylem hydraulic functional strategy, our study clearly indicated that the compensation effect is the evolutionary basis for the coordination of xylem hydraulic and photosynthesis physiology.