草地农业科技学院机构知识库

Institutional Repository, College of Pastoral Agriculture Science and Technology

 

兰州大学机构库  > 草地农业科技学院  > 期刊论文
题名: The characteristics of Na+, K+ and free proline distribution in several drought-resistant plants of the Alxa Desert, China
作者: Wang, SM(王锁民); Wan, CG; Wang, YR(王彦荣); Chen, H; Zhou, ZY; Fu, H(傅华); Sosebee, RE
收录类别: SCIE
出版日期: 2004-02
刊名: JOURNAL OF ARID ENVIRONMENTS
卷号: 56, 期号:3, 页码:525-539
出版者: ELSEVIER
出版地: LONDON
英文摘要: The distribution characteristics of Na+, K+ and free proline were investigated in succulent xerophytes-Haloxylon ammodendron and Zygophyllum xanthoxylum; xerophytes-Artemisia sphaerocephala and Caragana korshinskii; and mesophytes-Agriophyllum squarrosum and Corispermum mongolicum in the Alxa Desert of China. The results showed that mesophytes and xerophytes were salt excluding species, and the concentrations of Na+ in these species were 1.5% to 3.8% of those in succulent xerophytes. Concentrations of K+ in Agriophyllum squarrosum and Corispermum mongolicum were 1.3-2.7 times those in Artemisia sphaerocephala and Caragana korshinskii. Concentrations of K+ in the stems of Agriophyllum squarrosum and Corispermum mongolicum were 1.8 and 2.2 times those in their roots, respectively, For mesophytes, accumulating large quantities of K+ in their stems may facilitate water movement along a soil-plant gradient. The xerophytes accumulated large quantities of K+ and free proline. Their proline concentrations in the whole plant were 6.0-16.0 times higher than those of mesophytes, and were 1.8-25.0 times higher than those of succulent xerophytes. In Artemisia sphaerocephala, the concentrations of proline increased by 3.1- and 10.5-fold from roots to stems, and from stems to leaves, respectively. A similar trend was observed in Caragana korshinskii. Therefore, accumulating K+ and free proline may play a role in drought adaptation in xerophytes. Succulent xerophytes Haloxylon ammodendron and Zygophyllum xanthoxylum were identified as salt diluting species that absorbed much Na+ by roots, and the Na+ was transported to the leaves and photosynthesizing branches. The succulent xerophytes accumulated larger quantities of Na+ than K+ for osmotic adjustment even at low soil salinities, resulting in the lowest values of selective absorption and selective transport capacities of the root systems. Our data suggest that Na+ accumulation rather than exclusion may be one of the most effective strategies for adaptation of succulent xerophytes to and environments. (C) 2003 Elsevier Science Ltd. All rights reserved.
关键词: succulent xerophytes ; xerophytes ; mesophytes ; Na (+) ; K (+) ; proline ; Alxa Desert ; osmotic adjustment ; drought ; halophytes
作者部门: Lanzhou Univ, Sch Pastoral Agr Sci & Technol, Lanzhou 730000, Peoples R China ; Lanzhou Univ, Gansu Grassland Ecol Res Inst, Lanzhou 730000, Peoples R China ; Texas Tech Univ, Dept Range Wildlife & Fisheries Management, Lubbock, TX 79409 USA ; Lanzhou Univ, Sch Life Sci, Lanzhou 730000, Gansu, Peoples R China
通讯作者: Wang, SM (reprint author), Lanzhou Univ, Sch Pastoral Agr Sci & Technol, Lanzhou 730000, Peoples R China.
学科分类: Environmental Sciences & Ecology
文章类型: Article
语种: 英语
DOI: 10.1016/S0140-1963(03)00063-6
ISSN号: 0140-1963
WOS记录号: WOS:000187882600009
第一机构:
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/113527
Appears in Collections:草地农业科技学院_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
Wang-2004-The characteristics of Na+, K+ and f.pdf(167KB)----限制开放 联系获取全文

Recommended Citation:
Wang, SM,Wan, CG,Wang, YR,et al. The characteristics of Na+, K+ and free proline distribution in several drought-resistant plants of the Alxa Desert, China[J]. JOURNAL OF ARID ENVIRONMENTS,2004,56(3):525-539.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Altmetrics Score
 
Google Scholar
Similar articles in Google Scholar
[Wang, SM]'s Articles
[Wan, CG]'s Articles
[Wang, YR]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Wang, SM]‘s Articles
[Wan, CG]‘s Articles
[Wang, YR]‘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
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!
Email:
Passwd
验 证:
换一张
Have you forgotten your password? Log In
Copyright © 2007-2017  兰州大学 - Feedback
Powered by CSpace