Based on the V.adenoclada Hand.-Mazz, Vitis davidu, Vitis heyneana, Sunset Red, Venus Seedless, and Ruby Seedless as experimental materials, LI-6400 portable photosynthesis was used to measure net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, and transpiration rate of five varieties.The results showed that the net photosynthetic rate of V.adenoclada Hand.-Mazz was higher than common cultivated varieties Sunset Red, and without 'lunch break' V. adenoclada Hand.-Mazz was superior to other grape cultivars in photosynthetic perf...