干旱区生态环境知识资源中心(Arid): Hydraulic vulnerability difference between branches and roots increases with environmental aridity

Arid

DOI	10.1007/s00442-024-05562-7
	Hydraulic vulnerability difference between branches and roots increases with environmental aridity
	Tang, Weize; Liu, Xiaorong; Liang, Xingyun; Liu, Hui; Yu, Kailiang; He, Pengcheng; McAdam, Scott; Zhao, Han; Ye, Qing
通讯作者	Ye, Q
来源期刊	OECOLOGIA
ISSN	0029-8549
EISSN	1432-1939
出版年	2024
卷号	205 期号:1 页码:177-190
英文摘要	The vulnerability of plant xylem to embolism can be described as the water potential at which xylem conductivity is lost by 50% (P-50). According to the traditional hypothesis of hydraulic vulnerability segmentation, the difference in vulnerability to embolism between branches and roots is positive (P50 root-branch > 0). It is not clear whether this occurs broadly across species or how segmentation might vary across aridity gradients. We compiled hydraulic and anatomical datasets from branches and roots across 104 woody species (including new measurements from 10 species) in four biomes to investigate the relationships between P50 root-branch and environmental factors associated with aridity. We found a positive P50 root-branch relationship across species, and evidence that P50 root-branch increases with aridity. Branch xylem hydraulic conductivity transitioned from more efficient (e.g., wider conduit, higher hydraulic conductivity) to safer (e.g., narrower conduit, more negative P-50) in response to the increase of aridity, while root xylem hydraulic conductivity remained unchanged across aridity gradients. Our results demonstrate that the hydraulic vulnerability difference between branches and roots is more positive in species from arid regions, largely driven by modifications to branch traits.
英文关键词	Embolism Environment variables Hydraulic conductivity Hydraulic safety Xylem anatomy
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001228525400001
WOS关键词	STRESS-INDUCED CAVITATION ; XYLEM VULNERABILITY ; EMBOLISM RESISTANCE ; VESSEL LENGTH ; WATER-UPTAKE ; CONIFER ; EFFICIENCY ; ANGIOSPERM ; TRANSPORT ; STEMS
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404996
推荐引用方式 GB/T 7714	Tang, Weize,Liu, Xiaorong,Liang, Xingyun,et al. Hydraulic vulnerability difference between branches and roots increases with environmental aridity[J],2024,205(1):177-190.
APA	Tang, Weize.,Liu, Xiaorong.,Liang, Xingyun.,Liu, Hui.,Yu, Kailiang.,...&Ye, Qing.(2024).Hydraulic vulnerability difference between branches and roots increases with environmental aridity.OECOLOGIA,205(1),177-190.
MLA	Tang, Weize,et al."Hydraulic vulnerability difference between branches and roots increases with environmental aridity".OECOLOGIA 205.1(2024):177-190.