The plants of two sugarcane varieties GT28(cold resistant)and ROC22(cold susceptible)were studied by means of artificial temperature-controlled phytotron,and the changes of soluble protein content,SOD activity,POD activity,and Mg2 +-ATPase activity were investigated under low temperature in sugarcane Internodes.The results showed that under low temperature stress,the soluble protein content in internode of the two sugarcane varieties first increased and then decreased.The SOD and POD activities both increased compared with the normal conditions,and the activities of GT28 were significantly higher than those of ROC22.The two enzyme activities persistently decreased with the increasing stress time.However,the activity of Mg2 +-ATPase gradually declined,and GT28 kept a higher level of ATPase activity than ROC22.Sugarcane varieties GT28 maintained high enzyme activities under low temperature st~ss,which might be one of the reasons for its strong cold resistance.
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万方数据
维普
