Abstract:

In order to study the effect of water stress on photosynthetic characteristics and yield of different wheat cultivars (‘Qingmai6’, ‘Lumai21’, ‘Liangxing99’, ‘Yannong21’, ‘Yannong24’, ‘Jimai22’) was studied. The results showed that, compared with the water sufficient condition (CK), the LAI, chlorophyll content, net photosynthesis rate, transpiration rate, WUE, as well as stomatal conductance decreased under water stress, which resulted in significant decreased yield. There was significant difference among tested varieties in sensitive to water stress. Compared with the other five varieties, ‘Qingmai6’ showed the highest chlorophyll content, net photosynthesis rate, transpiration rate, WUE and stomatal conductance under water stress condition, and the decrease of yield and yield components were less, which induced highest yield, only dropped 14% compared to the same time moisture content processing.