Defensive plant responses induced by Nesidiocoris tenuis (Hemiptera: Miridae) on tomato plants
Defensive plant responses induced by Nesidiocoris tenuis (Hemiptera: Miridae) on tomato plants
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DOI：
10.1007/s10340-014-0640-0
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发表时间：
2015-09-01
影响因子：
4.8
通讯作者：
Urbaneja, Alberto
中科院分区：
文献类型：
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作者：
Perez-Hedo, Meritxell;Urbaneja-Bernat, Pablo;Urbaneja, Alberto
在过去的十年里，温室番茄和其他农作物的生物防治计划已经成功地利用植食性动植物害虫(飞蛾科)实施，这种昆虫既可以捕食植物组织，也可以捕食昆虫。众所周知，植物对食草动物攻击的反应是通过植物激素触发的不同途径释放挥发性化合物。这些由食草动物诱导的植物挥发物可以警告邻近的植物，排斥或吸引食草动物，并吸引这些食草动物的天敌。然而，到目前为止，还没有研究过动植物食性捕食者诱导植物反应的可能好处，这些反应可能会增加它们作为生防剂的效用。在这里，我们发现食草性天敌Nesidiocoris tenuis激活了番茄植株中的脱落酸和茉莉酸(JA)信号通路，这使得它们对世界范围内的主要番茄害虫烟粉虱的吸引力降低，而对烟粉虱寄生蜂的吸引力增加。我们还发现，完整的番茄植株暴露在被刺穿的植株的挥发物中，激活了JA途径，因此，台湾石杉也被这些具有激活防御系统的完整植株所吸引。因此，我们的结果表明，细小卷蛾不仅通过食虫性直接惠及番茄植株，而且还通过植食性间接惠及番茄植株，从而诱导番茄植株的生理反应。
In the last decade, biological control programs for greenhouse tomatoes and other crops have been successfully implemented using zoophytophagous plant bugs (Miridae), which can feed on both plant tissues and insect prey. It is well known that plants respond to herbivore attacks by releasing volatile compounds through diverse pathways triggered by phytohormones. These herbivore-induced plant volatiles can alert neighboring plants, repel or attract herbivores, and attract natural enemies of these herbivores. Nevertheless, the possible benefits of induced plant responses by zoophytophagous predators that could add to their usefulness as biocontrol agents have not been studied until now. Here we show that the zoophytophagous predator Nesidiocoris tenuis activated abscisic acid and jasmonic acid (JA) signaling pathways in tomato plants, which made them less attractive to the whitefly Bemisia tabaci, a major tomato pest worldwide, and more attractive to the whitefly parasitoid, Encarsia formosa. We also found that intact tomato plants exposed to volatiles from N. tenuis-punctured plants activated the JA pathway, and as a consequence, E. formosa was also attracted to these intact plants with activated defense systems. Thus, our results demonstrate that N. tenuis not only benefits tomato plants directly by entomophagy but also indirectly by phytophagy, which induces a physiological response in the tomato plant.