干旱区生态环境知识资源中心(Arid): 植物叶片水稳定同位素研究进展

Arid

	植物叶片水稳定同位素研究进展
其他题名	Advances in the study of stable isotope composition of leaf water in plants
	罗伦 1; 余武生 1; 万诗敏 2; 周平 3
来源期刊	生态学报
ISSN	1000-0933
出版年	2013
卷号	33 期号:4 页码:1031-1041
中文摘要	植物叶片水稳定同位素变化可以直接沟通植物叶片内部与外界的物质和能量联系,并能够反映植物生长周围的气候与生态信息。另外,植物叶片水作为参与水循环的一个重要环节,了解叶片水稳定同位素组成有助于揭示其在局地水体稳定同位素循环中的分配与贡献。概述了国内外叶片水稳定同位素研究现况;介绍了叶片水稳定氢、氧同位素在植物体中的分馏过程及形式(热力学平衡分馏、动力学分馏以及生化分馏)以及影响叶片水稳定同位素组成的气象和生态因子;阐述了叶片水稳定同位素修正的Craig-Gordon稳态模型、string-of-lakes模型、Peclet效应的稳态模型、非稳态效应的模型、Peclet效应的非稳态模型以及二维模型的构建与完善过程;最后讨论了植物叶片水稳定同位素研究存在的问题,并从叶片水稳定同位素与气象、生态因子的关系,叶片水蒸腾线的斜率和截距及过量氘的意义,模型适用性的验证以及叶片水稳定同位素在水文循环的应用等方面展望了研究方向。
英文摘要	Variations of bulk leaf water stable isotopes can indicate mass and energy exchange between the inside and outside of the leaves,and can also reflect the climate and ecological conditions of the areas in which plants live. Moreover,leaf water in plants plays a significant role in the hydrological cycle. Understanding the stable isotope composition of leaf water is helpful to reveal the distribution and contribution of leaf water stable isotopes to the local water stable isotope cycle. This paper reviews the advance in the study of stable isotope composition of leaf water in plants. It is clear that stable isotope fractionation of water in plants would not take place until it entered into the leaves,and there are three types of isotope fractionation-equilibrium,kinetic and biochemical isotope fractionations in the leaves. The factors impacting on the stable isotope composition of leaf water include the meteorological conditions such as air temperature,relative humidity,atmospheric pressure,and wind speed as well as the ecological conditions such as transpiration rate,stomatal conductance,and so on. Similar as that of precipitation,the linear relationship also exists between delta18O and deltaD of leaf water in plants.However,the slopes of the regressive lines are significantly lower than those of some Local Meteoric Water Lines (LMWLs). Furthermore,some leaf water models,such as the steady-state (modified Craig-Gordon) model,string-of-lakes model,steady-state model including the Peclet effect,non-steady-state model (including the Peclet effect or not),and two-dimensional model are interpreted. In addition,this paper discusses some problems in the study of leaf water stable isotopes,and suggests some possible trends for future research on the relationship between stable isotope composition of leaf water and meteorological and ecological factors,the signals of the deuterium excess of leaf water and of the slope and intercept of evaporation line for leaf water,the validation of the models in China,especially cold-arid regions,and the application of stable isotopes of leaf water in water cycle.
中文关键词	植物 ; 叶片水 ; 稳定同位素 ; 模型
英文关键词	plant leaf water stable isotopes model
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4769094
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229977
作者单位	1.中国科学院青藏高原研究所, 中国科学院青藏高原环境变化与地表过程重点实验室, 北京 100101, 中国; 2.天津城市建设学院基础学科部, 天津 300384, 中国; 3.长春气象探测中心, 长春, 吉林 130062, 中国
推荐引用方式 GB/T 7714	罗伦,余武生,万诗敏,等. 植物叶片水稳定同位素研究进展[J],2013,33(4):1031-1041.
APA	罗伦,余武生,万诗敏,&周平.(2013).植物叶片水稳定同位素研究进展.生态学报,33(4),1031-1041.
MLA	罗伦,et al."植物叶片水稳定同位素研究进展".生态学报 33.4(2013):1031-1041.