虫害对不同水分条件胡杨披针形叶活性氧代谢的影响

应用生态学报 ›› 2004, Vol. ›› Issue (5): 849-852.

虫害对不同水分条件胡杨披针形叶活性氧代谢的影响

万东石¹, 李红玉¹, 周攻克¹, 梁厚果¹, 张立新²

收稿日期:2002-12-06 修回日期:2003-05-08
通讯作者: 李红玉
基金资助:
国家自然科学基金(30170238);甘肃省中青年自然科学基金(YS011A25003);中国科学院沙坡头沙漠试验站开放基金(200015);中国科学院百人计划基金资助项目(39670070)

Effect of insect pest on activated oxygen metabolism in lanceolate leaves of Populus euphratica under different water condition

WAN Dongshi¹, LI Hongyu¹, ZHOU Gongke¹, LIANG Houguo¹, ZHANG Lixin ²

1. Department of Biochemistry and Molecular Biology, Life School, Lanzhou University, Lanzhou 730000, China;
2. Shapotou Desert Experiment and Research Station of Cold and Arid Regions Envioronmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2002-12-06 Revised:2003-05-08

摘要/Abstract

摘要： 在不同土壤水分条件下,研究了胡杨披针形叶叶片遭受虫害胁迫时活性氧释放和抗氧化酶活性的变化.结果表明,单纯的土壤水分亏缺并不导致H₂O₂、H₂O₂的释放增加以及SOD、CAT活性上升;但土壤水分亏缺条件下的虫害胁迫却导致胡杨披针形叶叶片O₂^{·^-}、H₂O₂的释放增加,SOD、CAT活性上升.在人工灌溉生境下,虫害胁迫却使二者均呈下降趋势.可以认为,土壤水分亏缺条件下的虫害胁迫是造成胡杨枯死亡的主要原因之一.

关键词: 土壤水分亏缺, 虫害, 活性氧, 抗氧化酶

Abstract: This paper studied the effect of insect pest on the activities of protective enzymes SOD and CAT and the contents of H₂O₂ and H₂O₂ in lanceolate leaves of Populus euphratica under different soil water conditions.The results showed that soil water deficiency did not increase SOD and CAT activities and H₂O₂ and H₂O₂ contents in lanceolate leaves,but under this condition,insect pest increased them.When soil water was abundance,insect pest couldn't increase the activities of SOD and CAT and the contents of H₂O₂ and H₂O₂ in lanceolate leaves.It's concluded that insect pest had an important role in death of Populus euphratica under soil water deficiency.

Key words: Water stress, Insect pest, Active oxygen species, Antioxidant enzyme

中图分类号:

Q945.78

万东石, 李红玉, 周攻克, 梁厚果, 张立新. 虫害对不同水分条件胡杨披针形叶活性氧代谢的影响[J]. 应用生态学报, 2004, (5): 849-852.

WAN Dongshi, LI Hongyu, ZHOU Gongke, LIANG Houguo, ZHANG Lixin . Effect of insect pest on activated oxygen metabolism in lanceolate leaves of Populus euphratica under different water condition[J]. Chinese Journal of Applied Ecology, 2004, (5): 849-852.

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