Volatile organic compound emission from hohn oak infested by gypsy moth larvae: evidence for distinct responses in damaged and undamaged leaves
Volatile organic compound emission from hohn oak infested by gypsy moth larvae: evidence for distinct responses in damaged and undamaged leaves
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DOI：
10.1093/treephys/27.10.1433
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发表时间：
2007-10-01
期刊：
影响因子：
4
通讯作者：
Lhoutellier, Louise
中科院分区：
文献类型：
--
作者：
Staudt, Michael;Lhoutellier, Louise
冬青叶(holm橡树），一种分布广泛的地中海物种，组成性地排放大量的挥发性有机化合物（VOC）的复杂的基因型依赖性混合物。舞毒蛾（Lymantria dispar L.）在法国南部，我们研究了舞毒蛾取食对Q全叶尖和单叶挥发性有机化合物产生的影响。冬青摄食诱导的新的挥发性有机化合物的排放速率高达240 ng m（-2）s（-1）（总的挥发性有机化合物释放的16%），其中主要由倍半萜，高萜和单萜醇。新的化合物在虫害后几个小时的延迟后释放出来，当毛虫被清除后，它们的产量迅速下降。未受损的树叶被感染的树木发出新的挥发性有机化合物，但与受损的树叶和较低的利率不同的组合物。毛毛虫和毛毛虫的排泄物都不会释放VOC。排放的挥发性有机化合物的未受损的树叶的虫害树木暂时增加了30%，而在受损的树叶，他们保持稳定，并减少了几天后，当坏死点发生在周围的喂养网站。在连续光照和恒温条件下，新挥发性有机化合物的排放表现出明显的昼夜循环，而本构挥发性有机化合物则没有。结果表明，诱导的挥发性有机化合物作出了显着的贡献，大气中的VOC负荷，并可能介导营养相互作用。所观察到的差异的局部和系统的组合物，数量和时间过程的排放反映了存在的几个监管过程所引发的不同的信号化合物和激发子。
Foliage of Quercus ilex L. (holm oak), a widespread Mediterranean species, constitutively emits large quantities of a complex genotype-dependent mixture of volatile organic compounds (VOCs). During a mass outbreak of gypsy moth (Lymantria dispar L.) in southern France, we examined the effects of gypsy moth feeding on VOC production from whole apices and single leaves of Q. ilex. Feeding induced the emission of new VOCs at rates up to 240 ng m(-2)s(-1) (16% of the total VOC release), which mainly consisted of sesquiterpenes, a homoterpene and a monoterpene alcohol. The new compounds were emitted after a delay of several hours following infestation and their production declined rapidly when caterpillars were removed. Undamaged leaves of infested trees emitted new VOCs, but with a different composition to those of damaged leaves and at lower rates. Neither caterpillars nor caterpillar excrement released VOCs. Emission of constitutive VOCs by undamaged leaves of infested trees temporary increased by up to 30%, whereas, in damaged leaves, they remained stable and decreased after some days when necrotic spots occurred around the feeding sites. In continuous light and at constant temperature, emissions of new VOCs showed a marked diurnal cycle, whereas those of constitutive VOCs did not. The results suggest that induced VOCs make a significant contribution to the atmospheric VOC load and may mediate trophic interactions. The observed differential local and systemic responses in composition, quantity and time courses of emissions mirror the existence of several regulation processes triggered by different signaling compounds and elicitors.