The Tea Weevil, Myllocerinus aurolineatus, is Attracted to Volatiles Induced by Conspecifics
The Tea Weevil, Myllocerinus aurolineatus, is Attracted to Volatiles Induced by Conspecifics
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茶象甲 Myllocerinus aurolineatus 会被同种引起的挥发物所吸引
DOI：
10.1007/s10886-010-9771-9
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发表时间：
2010-04-01
影响因子：
2.3
通讯作者：
Chen, Zong-Mao
中科院分区：
文献类型：
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作者：
Sun, Xiao-Ling;Wang, Guo-Chang;Chen, Zong-Mao
茶象甲（Myllocerinus aurrolineatus, Voss）（鞘翅目：茶象科）是茶树（Camellia sinensis， O.Ktze.）的食叶害虫，其聚集行为会严重降低茶叶的产量和品质。虽然食草动物诱导的寄主植物挥发物已被证明可以吸引一些同种害虫，特别是金盏花科的成员，但对于被aurrolineatus成虫侵染的茶树所释放的挥发物及其在介导同种昆虫之间相互作用中的作用知之甚少。行为生物测定结果表明，被蠓侵染的茶树散发出的挥发性化合物对同种象鼻虫具有吸引作用。挥发物分析表明，侵染显著增加了挥发物(Z)-3-己烯醛、(Z)-3-己烯醇、(E)- - -辛烯、芳樟醇、苯乙醇、苄基腈、吲哚、（E， E）- -法尼烯、(E)-神经醇和其他31种化合物的排放。在诱导挥发物中，包括γ -萜烯、苯甲醇、(Z)-3-己烯乙酸酯、月桂烯、苯甲醛、(Z)-3-己烯和（E， E）- α -法尼烯在内的12种化学物质引起了食草动物两性的触角反应，而(E)- β -辛烯仅引起雄性的触角反应。使用y形管嗅觉计，我们发现13种化学物质中的6种，γ -萜烯、苯甲醇、(Z)-3-己烯乙酸酯、桃金娘烯、苯甲醛和(Z)-3-己烯醛，对雄性和雌性都有吸引力；两种化学物质(E/Z)- - -辛烯和（E， E）- - -法尼烯仅对雄性有吸引力；四种化学物质（E)-4,8-二甲基-1,3,7-非三烯、苯乙醇、芳樟醇和(Z)-3-己烯醇）只对雌性有吸引力。这些发现为茶树和它们的食草动物之间的相互作用提供了新的见解，并可能帮助科学家开发出控制食草动物的新策略。
The tea weevil, Myllocerinus aurolineatus (Voss) (Coleoptera: Curculionidae), is a leaf-feeding pest of Camellia sinensis (O.Ktze.) with aggregative behaviors that can seriously reduce tea yield and quality. Although herbivore-induced host plant volatiles have been shown to attract conspecific individuals of some beetle pests, especially members of the Chrysomelidae family, little is known about the volatiles emitted from tea plants infested by M. aurolineatus adults and their roles in mediating interactions between conspecifics. The results of behavioral bioassays revealed that volatile compounds emitted from tea plants infested by M. aurolineatus were attractive to conspecific weevils. Volatile analyses showed that infestations dramatically increased the emission of volatiles, (Z)-3-hexenal, (Z)-3-hexenol, (E)-beta-ocimene, linalool, phenylethyl alcohol, benzyl nitrile, indole, (E, E)-alpha-farnesene, (E)-nerolidol, and 31 other compounds. Among the induced volatiles, 12 chemicals, including gamma-terpinene, benzyl alcohol, (Z)-3-hexenyl acetate, myrcene, benzaldehyde, (Z)-3-hexenal, and (E, E)-alpha-farnesene, elicited antennal responses from both sexes of the herbivore, whereas (E)-beta-ocimene elicited antennal responses only from males. Using a Y-tube olfactometer, we found that six of the 13 chemicals, gamma-terpinene, benzyl alcohol, (Z)-3-hexenyl acetate, myrcene, benzaldehyde, and (Z)-3-hexenal, were attractive to both males and females; two chemicals, (E/Z)-beta-ocimene and (E, E)-alpha-farnesene, were attractive only to males; and four chemicals, (E)-4,8-dimethyl-1,3,7-nonatriene, phenylethyl alcohol, linalool, and (Z)-3-hexenol, were attractive only to females. The findings provide new insights into the interactions between tea plants and their herbivores, and may help scientists develop new strategies for controlling the herbivore.