Identifying Drought Tolerance of Four Grape Rootstocks

Four grape(Vitis vinifora) rootstocks 1103 P, 5BB, SO4, 3309 C were used to determine the change of physiological indexes under drought stress. Results showed that the content of soluble total sugar in the leaves of the grape rootstocks increased under drought stress, and content of soluble sugar in the hig drought resistance cultivars increased greatly. Chlorophyll decomposed rapidly with the aggravation of drought stress, and the chlorophyll of higer drought resistance cultivars decomposed slowly. SOD activity of higer drought resistance cultivars increased firstly and then decreased slowly. The content of Pro and MDA increased with the aggravation of drought stress. Drought resistance of four grape rootstocks was in the order of1103P5BB3309CSO4.