Herbivore benefits from vectoring plant virus through reduction of period of vulnerability to predation.
Herbivore benefits from vectoring plant virus through reduction of period of vulnerability to predation.
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DOI：
10.1007/s00442-008-1027-9
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发表时间：
2008-07
期刊：
影响因子：
2.7
通讯作者：
Sabelis, Maurice W.
中科院分区：
文献类型：
--
作者：
Belliure, Belen;Janssen, Arne;Sabelis, Maurice W.
食草动物可以从引导植物病原体中获益，因为植物对病原体的诱导防御有时会干扰植物对食草动物的诱导防御。植物也可以通过食草动物的天敌的行动间接地保护自己。目前尚不清楚植物中诱导的对病原体的防御是否也会干扰通过第三营养级介导的对食草动物的间接防御。我们以前表明，番茄斑萎病毒（TSWV）的植物感染增加了其载体，蓟马Frankliniella oceanentalis的发育率和幼体存活率。本文报道了TSWV感染植物后对三种天敌的影响。西花螨：捕食性螨黄瓜新小绥螨和退化伊菲绥螨，以及捕食性虫光滑小花蝽。蓟马幼虫的生长速率受到寄主植物中病毒存在的正影响。由于大型幼虫是无懈可击的两种捕食螨的捕食，这导致了在较短的时间内的脆弱性捕食的蓟马，开发的植物与病毒比蓟马开发未感染的植物（4.4与7.9天，分别）。由于大型蓟马幼虫并非无懈可击的捕食性错误Orius laevigatus的捕食，感染的植物并没有影响蓟马幼虫从这个捕食者的捕食风险。这是第一次证明植物病原体对其载体捕食风险的负面影响。
Herbivores can profit from vectoring plant pathogens because the induced defence of plants against pathogens sometimes interferes with the induced defence of plants against herbivores. Plants can also defend themselves indirectly by the action of the natural enemies of the herbivores. It is unknown whether the defence against pathogens induced in the plant also interferes with the indirect defence against herbivores mediated via the third trophic level. We previously showed that infection of plants with Tomato spotted wilt virus (TSWV) increased the developmental rate of and juvenile survival of its vector, the thrips Frankliniella occidentalis. Here, we present the results of a study on the effects of TSWV infections of plants on the effectiveness of three species of natural enemies of F. occidentalis: the predatory mites Neoseiulus cucumeris and Iphiseius degenerans, and the predatory bug Orius laevigatus. The growth rate of thrips larvae was positively affected by the presence of virus in the host plant. Because large larvae are invulnerable to predation by the two species of predatory mites, this resulted in a shorter period of vulnerability to predation for thrips that developed on plants with virus than thrips developing on uninfected plants (4.4 vs. 7.9 days, respectively). Because large thrips larvae are not invulnerable to predation by the predatory bug Orius laevigatus, infection of the plant did not affect the predation risk of thrips larvae from this predator. This is the first demonstration of a negative effect of a plant pathogen on the predation risk of its vector.
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影响因子：
2.3
作者：
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通讯作者：
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影响因子：
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作者：
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作者：
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通讯作者：
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