Abstract: Photosynthesis,transpiration,water use efficency have been widely used in the studies of plant ecophysiology.The objective of this work is to seek the possibility of using these parameters as one of criteria for selecting suitable introduced grape cultivars after them introduced into a newly area,so that the suitable cultivars can be screened out at an early stage.With this objective,photosynthetic light response curves of six grape cultivars,which introduced into experimental site from home or abroad,in sapling developmental stages were measured in the open field conditions in 2009-2010 at Helan Research Base,Minzu University of China,Ningxia,China using a randomised complete block design.Following an increase in PPFD from 0 to 2 000 μmol/(m2·s),two grape cultivars,Crimson and Zana showed higher photosynthetic water use efficiency,supported by higher carbon assimilation capacities,achieved partly through lower transpiration rate,with higher growth rate observed in the field,to help suit to a shorter growing season and arid environment,suggesting that photosynthetic water use efficency could be used as an useful criteria for choosing suitable grape cultivars in the early growth stage in arid region.

Key words: Photosynthesis, Transpiration, Photosynthetic water use efficiency, Growth rate, Grape cultivar

CLC Number: 

• S663.03