干旱区生态环境知识资源中心(Arid): Stomatal opening ratio mediates trait coordinating network adaptation to environmental gradients

Arid

DOI	10.1111/nph.18189
	Stomatal opening ratio mediates trait coordinating network adaptation to environmental gradients
	Xie, Jiangbo; Wang, Zhongyuan; Li, Yan
通讯作者	Li, Y
来源期刊	NEW PHYTOLOGIST
ISSN	0028-646X
EISSN	1469-8137
出版年	2022
卷号	235 期号:3 页码:907-922
英文摘要	A trait coordination network is constructed through intercorrelations of functional traits, which reflect trait-based adaptive strategies. However, little is known about how these networks change across spatial scales, and what drivers and mechanisms mediate this change. This study bridges that gap by integrating functional traits related to plant carbon gain and water economy into the coordination network of Siberian elm (Ulmus pumila), a eurybiont that survives along a 3800 km environmental gradient from humid forest to arid desert. Our results demonstrated that both stomatal density and stomatal size reached a physiological threshold at which adjustments in these traits were not sufficient to cope with the increased environmental stress. Network analysis further revealed that the mechanism for overcoming this threshold, the stomatal opening ratio, g(ratio), was represented by the highest values for centrality across different spatial scales, and therefore mediated the changes in the trait coordination network along environmental gradients. The mediating roles manifested as creating the highest maximum theoretical stomatal conductance (g(smax)) but lowest possible g(ratio) for pathogen defense in humid regions, while maintaining the g(ratio) 'sweet spot' (c. 20% in this region) for highest water use efficiency in semihumid regions, and having the lowest g(smax) and highest g(ratio) for gas exchange and leaf cooling in arid regions. These results suggested that the stomatal traits related to control of stomatal movement play fundamental roles in balancing gas exchange, leaf cooling, embolism resistance and pathogen defense. These insights will allow more accurate model parameterization for different regions, and therefore better predictions of species' responses to global change.
英文关键词	covariation eurybiont guard cells maximum theoretical stomatal conductance (g(smax)) Siberian elm (Ulmus pumila) stomatal water availability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000797875500001
WOS关键词	ULMUS-PUMILA SEEDLINGS ; WATER-USE EFFICIENCY ; ASIAN DESERT SHRUBS ; GAS-EXCHANGE ; PHENOTYPIC PLASTICITY ; HUNSHANDAK SANDLAND ; LEAF TRAITS ; DENSITY ; CONDUCTANCE ; EVOLUTION
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393873
推荐引用方式 GB/T 7714	Xie, Jiangbo,Wang, Zhongyuan,Li, Yan. Stomatal opening ratio mediates trait coordinating network adaptation to environmental gradients[J],2022,235(3):907-922.
APA	Xie, Jiangbo,Wang, Zhongyuan,&Li, Yan.(2022).Stomatal opening ratio mediates trait coordinating network adaptation to environmental gradients.NEW PHYTOLOGIST,235(3),907-922.
MLA	Xie, Jiangbo,et al."Stomatal opening ratio mediates trait coordinating network adaptation to environmental gradients".NEW PHYTOLOGIST 235.3(2022):907-922.