Herbivore-mediated effects of glucosinolates on different natural enemies of a specialist aphid.
Herbivore-mediated effects of glucosinolates on different natural enemies of a specialist aphid.
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DOI：
10.1007/s10886-012-0065-2
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发表时间：
2012-01
影响因子：
2.3
通讯作者：
van Loon, Joop J. A.
中科院分区：
文献类型：
--
作者：
Kos, Martine;Houshyani, Benyamin;Achhami, Buddhi B.;Wietsma, Rafal;Gols, Rieta;Weldegergis, Berhane T.;Kabouw, Patrick;Bouwmeester, Harro J.;Vet, Louise E. M.;Dicke, Marcel;van Loon, Joop J. A.
关键词：
甘蓝蚜虫Brvicoryne brassicae是一种专业的食草动物，它将硫代葡萄糖苷从寄主植物中隔离出来，以抵御捕食者。目前尚不清楚这种隔离对寄生蜂的影响程度。我们研究了硫代葡萄糖苷对菜粉蝶和食草性天敌菜青虫的影响。我们在三个硫代葡萄糖苷含量不同的生态型拟南芥上和一个转基因品系上培育了甘蓝型油菜。我们测试了蚜虫的表现和两种天敌的行为。我们将这与韧皮部和蚜虫的硫代葡萄糖苷浓度和挥发物的释放相关联。油菜表现与韧皮部脂肪硫代葡萄糖苷和吲哚硫代葡萄糖苷浓度呈正相关。蚜虫选择性地隔离硫代葡萄糖苷。菜青虫体内硫代葡萄糖苷浓度与捕食者的行为呈负相关，与寄生蜂的行为呈正相关，这可能是因为硫代葡萄糖苷浓度越高的蚜虫体重越大。两种天敌均表现出正的性能-偏好相关关系。在每个测试组合中，捕食者偏爱挥发性硫代葡萄糖苷分解产物排放量最低的生态型，而寄生蜂偏爱挥发性硫代葡萄糖苷分解产物释放量最高的生态型。研究表明，硫代葡萄糖苷对捕食者和寄生蜂有不同的作用，这种作用是选择性地将硫代葡萄糖苷从寄主植物中隔离出来的。本文的在线版本(doi：10.1007/s10886-0120065-2)包含补充材料，授权用户可以使用。
The cabbage aphid Brevicoryne brassicae is a specialist herbivore that sequesters glucosinolates from its host plant as a defense against its predators. It is unknown to what extent parasitoids are affected by this sequestration. We investigated herbivore-mediated effects of glucosinolates on the parasitoid wasp Diaeretiella rapae and the predator Episyrphus balteatus. We reared B. brassicae on three ecotypes of Arabidopsis thaliana that differ in glucosinolate content and on one genetically transformed line with modified concentrations of aliphatic glucosinolates. We tested aphid performance and the performance and behavior of both natural enemies. We correlated this with phloem and aphid glucosinolate concentrations and emission of volatiles. Brevicoryne brassicae performance correlated positively with concentrations of both aliphatic and indole glucosinolates in the phloem. Aphids selectively sequestered glucosinolates. Glucosinolate concentration in B. brassicae correlated negatively with performance of the predator, but positively with performance of the parasitoid, possibly because the aphids with the highest glucosinolate concentrations had a higher body weight. Both natural enemies showed a positive performance-preference correlation. The predator preferred the ecotype with the lowest emission of volatile glucosinolate breakdown products in each test combination, whereas the parasitoid wasp preferred the A. thaliana ecotype with the highest emission of these volatiles. The study shows that there are differential herbivore-mediated effects of glucosinolates on a predator and a parasitoid of a specialist aphid that selectively sequesters glucosinolates from its host plant. The online version of this article (doi:10.1007/s10886-012-0065-2) contains supplementary material, which is available to authorized users.
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影响因子：
1.9
作者：
Kabouw, P.;Kos, M.;Biere, A.
通讯作者：
Biere, A.
影响因子：
2.3
作者：
Bukovinszky, T;Gols, R;van Lenteren, JC
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
Haubruge, E