摘要： 研究了夏玉米单交种苏玉1号及其亲本自交系叶片内活性氧酶性清除系统中的超氧物歧化酶（SOD）和过氧化氢酶（CAT）活性与玉米抗涝性的关系。淹水过程中，耐涝的母本苏80-1叶片中两种酶活性均比不耐涝的父本黄早四较少地受抑制，雨二醛（MDA）的积累量也较少。表明两亲本自交系间耐涝性的差异与其抵御活性氧毒害能力的强弱有关。杂交种（F1）则显示体内清除系统对涝渍的耐受性与其母本相仿，由于兼具生长的优势，因而表现为淹水条件下单株生产力受损最小。

关键词: 玉米, 耐涝性, 超氧物歧化酶, 过氧化氢酶, 丙二醛含量

Abstract: The summer corn (Zea mays L.) hybrid Suyu 1 and its two parental inbred, Su 801 (maternal inbred, waterlogging tolerant) and Huangzaosi (paternal inbred, waterlogging intolerant), were used to investigate the relationship between waterlogging resistance and the activity of superoxide dismutase (SOD) arid catalase and malondialdehyde (MDA) contents in leaves. The results showed that the decrease of SOD and ccatlaase activities and increase of MDA contents in Su 80-1 leaves were much less than that in Huangzaosi leaves under waterlogging condition. It is suggested that the difference of waterlogging tolerance between two parental inbred was positively correlated with their ability to resist the toxicity of biological active oxygen.The behavior of SOD and catalase activities and MDA content in Suyu 1 (F1 hybrid) under waterlogging condition was similar to that in Su 80-1 (maternal inbred). But the loss of biomass induced by waterlogging injury was the least in Suyu 1 among three varieties. This is pinly because of the rapid growth in F1 hybrid, so that it can avoid the sensitive stage.

Key words: Corn, Waterlogging tolerance, Superoxide dismutase (SOD), Catalase, Malondialdehyde (MDA) content

中图分类号: 

• S513.01