Phytopathogen lures its insect vector by altering host plant odor
Phytopathogen lures its insect vector by altering host plant odor
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DOI：
10.1007/s10886-008-9516-1
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发表时间：
2008-08-01
影响因子：
2.3
通讯作者：
Gross, Juergen
中科院分区：
文献类型：
--
作者：
Mayer, Christoph J.;Vilcinskas, Andreas;Gross, Juergen
许多造成全球农业产量损失的植物病原体都是由食草昆虫传播的。关于植物病原体、寄主植物和昆虫媒介之间相互作用的信息有限。在本文中，我们报道了缺乏细胞壁的细菌苹果植原体（Candidatus Phytoplasma mali）可以改变其宿主植物（苹果）的气味及其载体单化木虱 Cacopsylla picta 的行为。与未感染的苹果树相比，被这种植原体感染的苹果树释放出更多的β-石竹烯。以前没有与 Ca 接触过的木虱。马里疟原虫以及受感染的木虱更容易被植原体感染的苹果植株散发的挥发物所吸引，而不是未受感染的苹果植株散发的挥发物。在受感染植物上发育但未受感染的木虱表现出相反的行为。这些结果表明，病原体改变了宿主植物的气味，将其载体引诱到受感染的植物上。这可能会导致种群内传播媒介昆虫的数量增加。
Many phytopathogens that cause worldwide losses of agricultural yield are vectored by herbivorous insects. Limited information is available about the interactions among phytopathogens, host plants, and insect vectors. In this paper, we report that the cell wall-lacking bacterium Candidatus Phytoplasma mali can alter both the odor of its host plant (apple) and behavior of its vector, the univoltine psyllid Cacopsylla picta. Apple trees infected by this phytoplasma emitted higher amounts of beta-caryophyllene when compared to uninfected ones. Psyllids that had no previous contact with Ca. P. mali, as well as infected pyllids, are more attracted by volatiles emitted from phytoplasma-infected apple plants than from uninfected ones. Psyllids that had developed on infected plants without getting infected showed the opposite behavior. These results suggest that the pathogen modifies host plant odor that lures its vector to infected plants. This may result in higher numbers of transmitting vector insects within the population.