Abstract: Two cucumber cultivars Beijingjietou and Changchunmici that showed significant difference at low temperature germination were used to study the effects of low temperature on the hydrolases activities,including proteases and lipases,during seed germination.The results indicated that the ability to germinate under low temperature in cucumber were related to both the hydrolases activities and the appearance of the peaks,and the hydrolases activities played major role.During germination under low temperature,the sudden increases of both of the activities of protease and lipase in Changchunmici were observed,which indicated that new protease and lipase might be induced by low temperature,so the ability to germination under low temperature in Changchunmici was higher than that of Beijingjietou.Both of the activities of lipases of two cultivars were inhibited at the early stage of low temperature treatment,but not in proteases,which suggested that the lipase was more sensitive to low temperature than protease.

Key words: Cucumber, Low temperature, Germination, Protease, Lipase

CLC Number: 

• S642.2