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对重金属胁迫条件下扬稻 6号体内POD活性测定和POD同功酶的聚丙烯酰胺浓度梯度凝胶电泳分析表明 ,0 0 5mmol L的Cu2 +、Cd2 +和Hg2 +诱导扬稻 6号叶片和根系POD同功酶活性较对照提高 ,但≥ 0 5mmol L的Cu2 +、Cd2 +和Hg2 +抑制叶片分子量较小的POD同功酶的表达。 0 5～ 1 0mmol L的Cu2 +、Cd2 +和Hg2 +强烈抑制根系POD同功酶的表达。 0 0 5～1 0mmol L的Cu2 +、Cd2 +和Hg2 +显著诱导穗中POS同功酶的表达。
Under the conditions of heavy metal stress, the activity of POD in Yangdao 6 and the polyacrylamide concentration gradient gel electrophoresis analysis of POD isozymes showed that 0 0 5mmol L of Cu2 +, Cd2 + and Hg2 + The activities of POD isozymes in roots were higher than those in controls, but Cu2 +, Cd2 + and Hg2 + ≥0.5mmol L inhibited the expression of POD isozymes with smaller molecular weight. Cu2 +, Cd2 + and Hg2 + of 0 5 ~ 10 mmol L strongly inhibited the expression of POD isoenzyme in roots. Cu2 +, Cd2 + and Hg2 + from 0 0 to 10 mmol L significantly induced the expression of POS isozymes in panicles.