摘要： 利用聚丙烯酰胺凝胶垂直板电泳法，研究了不同浓度NaCl对冬小麦根（三叶期）过氧化物酶（POD）同工酶的影响，电泳结果显示：1 mg/g NaCl胁迫电泳图谱A区酶带较对照组增加2条，B区酶带增加1~3条；2 mg/g NaCl胁迫时，A区为1条酶带，B区酶带增加了3条；t检验表明：1 mg/g NaCl胁迫时B区新增3条酶带的品种的株高和穗长极显著（P＜0.01）高于B区新增1条酶带的品种。

关键词: 冬小麦, 过氧化物酶, 同工酶, 盐胁迫

Abstract: Effects of salt stress with different concertrations on POD isoenzyme of winter wheat roots in three-leaf stage were studied by PAGE. The results showed: in the case of 1 mg/g NaCl, the isoenzyme bands were two more than control in region A, and 1-3 more than control in region B, the stem height and spike length of varieties with three new bands were higher than that of those with one new band in region B. In the case of 2 mg/g NaCl, comparing with control, the number of isoenzymes bands was no difference in region A, but three new bands appeared in region B.

Key words: Winter wheat, Peroxidase, Isoenzyme, Salt stress