西花蓟马取食与机械损伤对菜豆叶片抗氧化系统的影响
Effects of Frankliniella occidentalis feeding and mechanical damage on the antioxidant system in bean leaves
从春蕾,郅军锐**,廖启荣,牟峰
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作者单位：贵州大学昆虫研究所 贵州山地农业病虫害重点实验室贵阳550025
中文关键词：西花蓟马， 取食， 机械损伤， 抗氧化酶， 抗氧化物质
英文关键词：Frankliniella occidentalis, feeding, mechanical damage, antioxidant enzyme, antioxidant substance
中文摘要： 本文研究了西花蓟马Frankliniella occidentalis(Pergande)取食和机械损伤诱导对菜豆抗氧化系统的影响，比较了不同损伤形式诱导的抗氧化酶活力和抗氧化物质含量的变化差异。结果表明，西花蓟马取食和机械损伤均可诱导菜豆叶片内过氧化物酶（POD）、超氧化物歧化酶（SOD）和过氧化氢酶（CAT）3种抗氧化酶活性有不同程度的升高，但两种处理诱导的抗氧化酶活性变化规律不完全相同，各种酶活性达到最高点时间不同，西花蓟马取食对抗氧化酶活力的诱导作用大于机械损伤的。两种处理诱导下的类胡萝卜素的含量变化不大，但不论西花蓟马取食还是机械损伤均导致菜豆叶片内类黄酮和总酚含量整体呈下降趋势，西花蓟马的取食诱导的下降幅度大于机械损伤的。因此，西花蓟马取食诱导明显高于机械损伤对菜豆抗氧化系统的影响。
英文摘要：The effects of Frankliniella occidentalis (Pergande) feeding and mechanical damage on the antioxidant system of bean leaves was studied by comparing the antioxidant enzyme activities and antioxidant substance content of bean leaves subject to these two treatments. Antioxidant enzymes of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) were found to increase to some extent after both feeding and mechanical damage. However, the changes in enzymes were not the same between the two treatments, and the times of peak enzyme activities differed between them. The effect of feeding on antioxidant enzyme activities was greater than that induced by mechanical damage. Differences in arotenoids were not significant between treatments. The amounts of flavones and total phenolics decreased after both treatments, with F. occidentalis feeding causing a greater decline than mechanical damage. These results indicate that feeding by thrips has a greater effect on the antioxidant system of bean plants than mechanical damage.