植物叶片水分利用效率研究综述

植物能否适应当地的极限环境条件,最主要的看它们能否很好地协调碳同化和水分耗散之间的关系,即植物水分利用效率(WUE)是其生存的关键因子.就近来研究最多的叶片水平上的WUE,从叶片WUE的定义,方法,进展等方面对其进行总结概括,并就今后植物叶片水分利用效率的研究提出了几点看法:方法上,叶片碳同位素方法是目前植物叶片长期水分利用效率研究的最佳方法,而δ13C的替代指标将继续是方法研究中的一个方向,前景乐观;研究内容上,要加强极端干旱区河岸林木的δ13C和WUE的研究;结合植物生理生态学,生物学和稳定同位素技术,探究植物叶片长期水分利用效率的机理,特别是要加强运用双重同位素模型加深和理解植物叶片长期水分利用效率变化规律和内在机制的研究;要结合多种方法,加强多时空尺度植物叶片WUE及其之间的转换研究.

Summary on the plant water use efficiency at leaf level

Whether plants adapt the local condition limited or not mostly depend on whether they may coordinate the relationship between carbon assimilation and water dissipation or not, that is, plant water use efficiency is the key factor of their surviving. However, at the different scale, the meaning of plant water use efficiency is different, this paper summed up the studying progress of WUE at the leaf level, which it is mostly researched in the recent, and presented following points studying the leaf water use efficiency for the future: for the methods, Foliar carbon isotope is the optimal way measuring plant foliar long water use efficiency at present, and the substitution indices of δ13C will continue to be a prospective direction;For studying contents, we should strengthen the research on δ13C and WUE of the riparian trees in the extreme arid area;Combined the plant ecophysiology, biology with the stable isotope technique, exploring the mechanism of plant foliar water use efficiency, especially reinforcing the studying of laws and interior mechanism of plant foliar long water use efficiency variety by means of the model of double isotope;using multi-means, research on the WUEs through various temporal-spatial scales and conversion.