Studies on the drought resistance of seedling in soybean

The morphological, physiological and biochemical characters of seedling of 10 soybean cultivars were studied based on pot experiment under drought stress, and the drought resistance of 10 soybean cultivars were evaluated comprehensively by grey relational grade analysis. The results indicated that the plant height, seedling dry weight, root dry weight, main root length, leaf area, water loss rate of excised-leaf, root vitality and chlorophyll content of soybean seedling under drought stress were decreased, while proline content and SOD activity were increased. There were large difference of morphological, physiological and biochemical characters among different soybean cultivars. Zheng 92116 and Qi 999-8 were the cultivars with strong drought resistance in seedling stage.