摘要
在不同干旱时期对盆栽“新红星”苹果叶片超氧化物歧化酶（ＳＯＤ）、过氧化物酶（ＰＯＤ）、淀粉酶活性及游离脯氨酸、叶绿素、可溶性糖、可溶性蛋白质和还原糖含量进行测定。结果表明：干旱胁迫初期，ＳＯＤ和ＰＯＤ活性及叶绿素含量升高，以后又逐渐下降，ＳＯＤ比ＰＯＤ对干旱的反应灵敏；游离脯氨酸和可溶性糖含量随干旱时间的延长呈上升趋势，而可溶性蛋白质含量呈下降趋势；淀粉酶活性和还原糖含量在干旱初期增加较多，以后有所下降，但仍高于对照。
The activities of superoxide dismutase(500)andperoxidase(POD)and starcllase,thecontents of free proline,chlorophyll,soluble sugar and proteins,and reducing sugar in leavesof the potted young starkrimson apple were measured in different drought stages。 The re-sults indicated that the activities of SOD and POD and contents of chlorophll increased inearly days of drought,then they decreased gradually, SOD was more sensitive to droughtthan POD;the contents of free proline and soluble sugar raised,while that of soluble proteindecreased as the time of drouglit lasted;the activity of starchase and nthe content of reducingsugar had a chgahle curvehigher to that of the CK in the early drought stage。
