干旱区生态环境知识资源中心(Arid): Isotope signature of maize stem and leaf and investigation of transpiration and water transport

Arid

DOI	10.1016/j.agwat.2020.106727
	Isotope signature of maize stem and leaf and investigation of transpiration and water transport
	Wu, Youjie; Du, Taisheng; Wang, Lixin
通讯作者	Du, TS (corresponding author), China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	247
英文摘要	Stable isotope signature of plant water contains essential information on water transport pathway and plant transpiration, which has been shown to be a powerful tracer in plant physiological and ecological processes. However, stable isotopes fractionation in processes of plant water transport and the relationship between transpiration rate (E) and effective pathway length (L) and their possible mechanisms are still largely mysterious and confusing. Here, we tested stable isotope signature of maize stem and leaf based on anatomical measurements and modeling, and propose a deuterium deviation in leaf water (Delta(d)) to understand variability leaf water isotope enrichment and transpiration. We found isotopes fractionation occurred in maize stems in arid area. Leaf transpiration rate was strongly affected by Delta(d). The data revealed L has a negative power relationship with E, with a single power function of L = 284.77E(-1.02); and the proportional deviation of leaf O-18 enrichment 1 -Delta(L)/Delta(E) is negatively correlated with E under low E (E 2.0 mmol m(-2) s(-1)) and, a positively relationship under high E (E > 2.0 mmol m(-2) s(-1)). Suggesting that a pivotal role of effective path length in driving variations in leaf transpiration rate. The deuterium deviation Delta(d) may have great potential to serve as a new diagnostic tool for understanding pathways of water transport in plant. Care should be taken when examining source-water and estimating roots water uptake using the stable isotope method in arid areas, and further study is needed to be carried out and confirm the conclusions across a range of environmental conditions and species.
英文关键词	Isotope enrichment Deuterium deviations Effective pathway length Transpiration rate Plant water transport
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000617777000009
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349323
作者单位	[Wu, Youjie] Hunan Agr Univ, Coll Water Resources & Civil Engn, Changsha 410128, Peoples R China; [Wu, Youjie; Du, Taisheng] China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China; [Wang, Lixin] Indiana Univ Purdue Univ Indianapolis IUPUI, Dept Earth Sci, Indianapolis, IN 46202 USA
推荐引用方式 GB/T 7714	Wu, Youjie,Du, Taisheng,Wang, Lixin. Isotope signature of maize stem and leaf and investigation of transpiration and water transport[J]. 中国农业大学,2021,247.
APA	Wu, Youjie,Du, Taisheng,&Wang, Lixin.(2021).Isotope signature of maize stem and leaf and investigation of transpiration and water transport.AGRICULTURAL WATER MANAGEMENT,247.
MLA	Wu, Youjie,et al."Isotope signature of maize stem and leaf and investigation of transpiration and water transport".AGRICULTURAL WATER MANAGEMENT 247(2021).