Variation in plant volatiles and attraction of the parasitoid Diadegma semiclausum (Hellen)
Variation in plant volatiles and attraction of the parasitoid Diadegma semiclausum (Hellen)
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DOI：
10.1007/s10886-005-2019-4
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发表时间：
2005-03-01
影响因子：
2.3
通讯作者：
van Lenteren, JC
中科院分区：
文献类型：
--
作者：
Bukovinszky, T;Gols, R;van Lenteren, JC
植物化感化学的差异可能会影响它们吸引寄生蜂的能力。我们研究了小菜蛾 (Plutella xylostella L.) 的寄生蜂 Diadegma semiclausum (Hellen) 对十字花科植物和非十字花科植物种间和种内气味混合变化的反应。在 Y 管生物测定中，将未受感染的球芽甘蓝 (Brassica oleracea L. gemmifera)、白芥菜 (Sinapis alba L.)、野生甘蓝 (Brassica oleracea) 和啤酒大麦 (Hordeum vulgare L.) 与 D. semiclausum 的吸引力进行了比较。所有植物的气味比干净的空气对寄生蜂更有吸引力。然而，通过相互测试，寄生蜂更喜欢来自三种十字花科物种的挥发性混合物，而不是啤酒大麦。黄蜂还会区分未受感染的十字花科植物：芥菜与野生甘蓝一样有吸引力，而且都比球芽甘蓝更具吸引力。将未受侵染的植物的吸引力与被宿主小菜蛾幼虫侵染的植物的吸引力进行比较。受寄主侵染的芥菜和球芽甘蓝比未受侵染的同种更具吸引力。有趣的是，未受感染的白芥末和受感染的球芽甘蓝的挥发性混合物同样具有吸引力。我们还通过收集顶空样品并使用 GC-MS 进行分析来比较不同植物来源的挥发性成分。挥发性剖面的相似性是通过基于霍恩指数的分层聚类和非度量缩放来确定的。由于其混合物中不含多种化合物，大麦的挥发性特征与十字花科植物混合物的挥发性特征有所不同。白芥末的气味特征与两种十字花科植物明显不同。野生甘蓝的气味特征与受感染的球芽甘蓝不同，但与未受感染的球芽甘蓝有重叠。受感染和未受感染的球芽甘蓝的气味混合物相似，主要是数量上的差异。 D. semiclausum 似乎会根据受感染和未受感染植物的气味混合物的挥发性成分的细微差异进行区分。
Differences in allelochemistry of plants may influence their ability to attract parasitoids. We studied responses of Diadegma semiclausum (Hellen), a parasitoid of the diamondback moth (Plutella xylostella L.), to inter- and intraspecific variation in odor blends of crucifers and a non-crucifer species. Uninfested Brussels sprout (Brassica oleracea L. gemmifera), white mustard (Sinapis alba L.), a feral Brassica oleracea, and malting barley (Hordeum vulgare L.) were compared for their attractivity, to D. semiclausum in a Y-tube bioassay. Odors from all plants were more attractive to the parasitoid than clean air. However, tested against each other, parasitoids preferred the volatile blend from the three cruciferous species over that of malting barley. Wasps also discriminated between uninfested crucifers: mustard was as attractive as feral B. oleracea, and both were more attractive than Brussels sprout. Attractivity of uninfested plants was compared with that of plants infested by larvae of the host P. xylostella. Host-infested mustard and Brussels sprout were more attractive than uninfested conspecifics. Interestingly, the volatile blends of uninfested white mustard and infested Brussels sprout were equally attractive. We also compared the volatile composition of different plant sources by collecting headspace samples and analysing them with GC-MS. Similarities of volatile profiles were determined by hierarchic clustering and non-metric scaling based on the Horn-index. Due to the absence of several compounds in its blend, the volatile profile of barley showed dissimilarities from blends of crucifers. The odor profile of white mustard was distinctly different from the two Brassicaceae. Feral Brassica oleracea odor profile was different from infested Brussels sprout, but showed overlap with uninfested Brussels sprout. Odor blends from infested and uninfested Brussels sprout were similar, and mainly quantitative differences were found. D. semiclausum appears to discriminate based on subtle differences in volatile composition of odor blends from infested and uninfested plants.