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作 者 ：任琴,谢明惠,张青文*,齐钢,刘小侠

期 刊 ：生态学报 2010年 30卷 11期 页码：3080~3086

关键词：紫茎泽兰；温度；光照；挥发性化学物质；

Keywords:Eupatorium adenophorum, temperature, light, volatile compounds,

摘 要 ：用不同温度和光照处理对照和棉蚜侵害的盆栽紫茎泽兰植株后，通过TCT-GC/ MS分析了叶片挥发物的成分及相对含量。结果表明：温度与光照均不影响对照和虫害紫茎泽兰挥发物的种类，但影响其挥发物的相对含量。当光照强度达到300-400μmol?m-2?s-1时，虫害紫茎泽兰挥发物中，多数单萜的相对含量显著高于对照，而倍半萜含量显著低于对照；绿叶挥发物相对含量与其对照相比差异不显著。当外界温度在15-30℃时，虫害紫茎泽兰挥发物中绿叶气体如己醛、2-己烯醛和多数单萜化合物的相对含量随温度升高而显著增加，而倍半萜含量却低于对照。说明适宜的温度和光照条件影响挥发物化学指纹图的构成，进而可能影响到蚜虫的取食。

Abstract:Using TCT-GC/MS technique, the comparative analysis of composition and relative percentage of volatile organic compounds in leaves of Eupatorium adenophorum infested with and without cotton aphids under control conditions at different temperatures and lights were performed. The Results showed that, composition of volatile compounds released from both the control and infested leaves were not affected, but the relative percentage of those were changed under the different temperatures and lights. When the light intensity reached 300-400μmol?m-2?s-1, the relative percentage of most monoterpenes were more abundant in infested leaves than in control leaves, while the relative percentage of sequiterpene decreased significantly. Furthmore, the relative contents of green leaf volatiles, such as Hexanal, 2-Hexenal and most monoterpenes, in the infested leaves of E. adenophorum significantly increased as temperature went up between 15℃ and 30℃, but sequiterpene decreased. These data may suggest that suitable temperature and light affected the chemical fingerprint of E.adenophorum, and hence influencing the aphids feeding.

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