水稻对稻负泥虫取食的生理响应
Physiological respons of rice plants to Oulema oryzae feeding
王丽艳1**,张海燕1,朱莹1,于磊1,丛斌2***
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作者单位：1 黑龙江八一农垦大学农学院大庆163319； 2 沈阳农业大学植物保护学院沈阳110161
中文关键词：水稻， 水稻负泥虫， 保护性酶
英文关键词：rice, Oulema oryzae, defense enzymes
中文摘要： 以水稻负泥虫-水稻互作为研究对象，分析了水稻负泥虫Oulema oryzae Kuwayama取食过程中抗、感2个品种水稻植株内保护性酶POD、SOD、CAT和MDA活性的变化动态。结果表明：在水稻负泥虫取食为害的过程中，SOD活性持续增强，POD、CAT和MDA活性呈现出先升高后降低的趋势，而且抗、感水稻植株中4种酶的活性均比未处理健康对照增加（抗虫品种中MDA含量变化除外）。另外，在24 h和48 h时水稻负泥虫取食抗虫品种引起的CAT活性变化的量明显高于感虫品种。抗、感2个水稻品种中4种保护性酶活性在虫害和机械伤害不同处理间没有明显差异。
英文摘要： The activity of four enzymes (POD, SOD, CAT and MDA) in rice varieties with different resistance to Oulema oryzae Kuwayama were investigated following insect browsing and mechanical damage to rice plants. The results suggest that SOD activity increased from 0 h to 96 h and that the other enzymes first increased and then decreased. Although MDA activity decreased more in resistant relative to other rice varieties, the activities of all enzymes were greater in both resistant and susceptible varieties compared to the controls. Furthermore, variation in CAT activity was obviously higher in the resistant than in the sensitive variety 24 h and 48 h after insect browsing. There was little difference in enzyme activity between plants subject to insect feeding and those subject to mechanical damage.