摘要
采用固相微萃取结合气质联用技术分析比较了除虫菊叶片与花序,以及花序5个开放时期(花蕾期、初开期、平开期、盛开期、开放末期)挥发性次生代谢物的成分与释放规律。结果表明:(1)从除虫菊叶片与花序中共检测到19种挥发性次生代谢物质,分别属于4个类别:单萜类、多萜类、绿叶挥发物类以及其他等;绿叶挥发物与多萜类是其中具有较高质量分数的化合物类别;(2)在除虫菊花序的不同开放阶段,各类挥发性成分的释放规律不同;花序挥发的次生物质比重最大的(E)-β-法尼烯的释放量在初开期达到最大值;绿叶挥发物类在花蕾期的释放量最高,并且随着花序的发育其释放量呈现逐渐降低的趋势;单萜类与其他类别的挥发物则都是在盛开期后的释放量有所升高。研究结果为了解除虫菊挥发性次生代谢物质成分奠定了基础,为除虫菊抗虫研究提供了依据。
We investigated and compared the volatile components released by the leaves and flowers of pyrethrum, and the inflorescences at 5 different development periods(bud period, first-opening period,middle-opening period, full-opening period, late-opening period) by using the solid phase microextraction coupled with gas chromatography-mass spectrometry. The results showed that:(1) totally 19 main components were detected in the volatiles of leaves and flowers of pyrethrum, which belonged to 4 volatile categories including green leaf volatile, monoterpene, sesquiterpene and the others; green leaf volatile and sesquiterpene were the main categories with high mass fraction;(2) volatile compounds emitted from different development periods of flowers showed different patterns: E-β-farnesene was the dominant component released the highest in the first-opening period, then declined in later periods; green leaf volatiles emitted the highest in the flower bud period and then continuously decreased in later periods. Monoterpenes and other compounds were gradually rising after full-opening period. The results can provide a foundation to the study of volatile compounds emitted by the pyrethrum and a basis for further research on the pest resistance of pyrethrum.
引文
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