低温锻炼及致害低温对黄瓜叶片两种酶活性的影响

The Effects of Cold Acclimation and Chilling Temperature Upon Activities of Catalase and Peroxidase in Cucumber Leaves

本试验以“津研 4号”、“津春三号”为试材 ,在白天 2 2℃ ,夜晚 6℃± 0 .5℃的低温持续锻炼 6天和致害低温 2℃处理 1 2 h后 ,对黄瓜叶片的过氧化物酶、过氧化氢酶活性进行了测定 .结果表明 ,经低温锻炼后两种酶的活性均显著提高 .遇到致害低温时 ,未经锻炼的苗其叶片过氧化氢酶的活性下降了 35% ,而经锻炼的只下降了 3.48% .

By studying activity of Catalase and Peroxidase in cucumber leaves, the results showed that: after cold acclimation activity of Catalase and Peroxidase both increased sharply, after chilling temperature activity of Catalase on the CK decreased 35%, but that of acclimation merely reduced 3.48%.