中国科学院青藏高原研究所机构知识库
Advanced  
ITPCAS OpenIR  > 图书馆  > 期刊论文
学科主题: 地理学::自然地理学
题名: Optimal balance of water use efficiency and leaf construction cost with a link to the drought threshold of the desert steppe ecotone in northern China
作者: Wei, HX (Wei, Haixia)1; Luo, TX (Luo, Tianxiang)1; Wu, B (Wu, Bo)2
通讯作者: Wei, HX
关键词: CHEMICAL-COMPOSITION ; NITROGEN-CONTENT ; ENERGETIC COST ; LOW-RAINFALL ; CARBON GAIN ; PHOTOSYNTHESIS ; NUTRIENT ; AREA ; PRODUCTIVITY ; ASSIMILATION
刊名: ANNALS OF BOTANY
发表日期: 2016
DOI: 10.1093/aob/mcw127
卷: 118, 期:3, 页:541-553
收录类别: SCI
合作性质: 国内
文章类型: Article
部门归属: 环境
英文摘要: Background and Aims In arid environments, a high nitrogen content per leaf area (Narea) induced by drought can enhance water use efficiency (WUE) of photosynthesis, but may also lead to high leaf construction cost (CC). Our aim was to investigate how maximizing Narea could balance WUE and CC in an arid-adapted, widespread species along a rainfall gradient, and how such a process may be related to the drought threshold of the desert-steppe ecotone in northern China.
Methods Along rainfall gradients with a moisture index (MI) of 0 center dot 17-0 center dot 41 in northern China and the northern Tibetan Plateau, we measured leaf traits and stand variables including speciinot signc leaf area (SLA), nitrogen content relative to leaf mass and area (N-mass, N-area) and construction cost (CCmass, CCarea), delta C-13 (indicator of WUE), leaf area index (LAI) and foliage N-pool across populations of Artemisia ordosica.
Key Results In samples from northern China, a continuous increase of N-area with decreasing MI was achieved by a higher N-mass and constant SLA (reduced LAI and constant N-pool) in high-rainfall areas (MI > 0 center dot 29), but by a lower SLA and N-mass (reduced LAI and N-pool) in low-rainfall areas (MI a parts per thousand currency sign 0 center dot 29). While delta C-13, CCmass and CCarea continuously increased with decreasing MI, the low-rainfall group had higher N-area and delta C-13 at a given CCarea, compared with the high-rainfall group. Similar patterns were also found in additional data for the same species in the northern Tibetan Plateau. The observed drought threshold where MI = 0 center dot 29 corresponded well to the zonal boundary between typical and desert steppes in northern China.
Conclusions Our data indicated that below a climatic drought threshold, drought-resistant plants tend to maximize their intrinsic WUE through increased N-area at a given CCarea, which suggests a linkage between leaf functional traits and arid vegetation zonation.
语种: 英语
WOS记录号: WOS:000383591200014
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7609
Appears in Collections:图书馆_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
V.118(3) 541-553 2016.pdf(1015KB)期刊论文作者接受稿开放获取View 联系获取全文

作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China
2.Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China

Recommended Citation:
Wei, HX ,Luo, TX ,Wu, B . Optimal balance of water use efficiency and leaf construction cost with a link to the drought threshold of the desert steppe ecotone in northern China[J]. ANNALS OF BOTANY,2016,118(3):541-553.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Wei, HX (Wei, Haixia)]'s Articles
[Luo, TX (Luo, Tianxiang)]'s Articles
[Wu, B (Wu, Bo)]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Wei, HX (Wei, Haixia)]‘s Articles
[Luo, TX (Luo, Tianxiang)]‘s Articles
[Wu, B (Wu, Bo)]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: V.118(3) 541-553 2016.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院青藏高原研究所 - Feedback
Powered by CSpace