Chemical alarm and defence in the oribatid mite Collohmannia gigantea (Acari: Oribatida)
Chemical alarm and defence in the oribatid mite Collohmannia gigantea (Acari: Oribatida)
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DOI：
10.1007/s10493-006-9015-4
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发表时间：
2006-08-01
影响因子：
2.2
通讯作者：
Raspotnig, Guenther
中科院分区：
文献类型：
--
作者：
Raspotnig, Guenther
中衍生混合甲螨Collohmannia aribatid的油腺分泌物具有报警信息素和异源激素性质。分泌物的四种组分，即单萜橙花醇甲酸酯，橙花醛，香叶醛和芳香族2-羟基-6-甲基-苯甲醛（2，6-HMBD），表现出中度至强烈的警报信息素活性在成螨。自然引发的反应是由于橙花醛（约50%的分泌）和可能的2，6-HMBD（只有5%的分泌，但强烈的警报信息素活性）。这是甲螨类报警信息素的第二次报道。十三烷和十五烷（=烃馏分的分泌物）没有引起明显的行为反应，最有可能作为溶剂和传播剂的信息素活性成分。报警反应的特点是由一个短的识别阶段（挥舞着腿的运动I），其次是退缩和恐慌逃离气味源。此外，所有6个组成部分的油腺分泌物，包括碳氢化合物，表现出强烈的异源性对模型甲螨捕食者，scarcummaenid甲虫，Euconnus（Tetramelus）oblongus。考虑到广泛的化学信息素性质的油腺分泌物中的甲螨（=一个高度衍生的甲螨组），这些结果提供了证据的一个natogenetically早期起源的防御和交流作用的油腺分泌物中的甲螨。这些作用包括警报通信，防御和抗真菌化合物的生产。
The multicomponent oil gland secretion of Collohmannia gigantea, a middle-derivative mixonomatan oribatid mite, is demonstrated to possess alarm pheromonal and allomonal properties. Four components of the secretion, namely the monoterpenes neryl formate, neral, geranial and the aromatic 2-hydroxy-6-methyl-benzaldehyde (2,6-HMBD), showed moderate to strong alarm pheromonal activity in adult mites. Naturally elicited response is due to neral (about 50% of the secretion) and probably 2,6-HMBD (only 5% of the secretion, but strong alarm pheromonal activity). This is the second report of an alarm pheromone in Oribatida. Tridecane and pentadecane (=the hydrocarbon fraction of the secretion) did not evoke evident behavioural reactions, and most likely serve as solvents and spreading agents for the pheromonal-active components. Alarm reactions were characterized by a short recognition phase (waving movements with legs I), followed by shrinking back and panic escape from the scent source. In addition, all six components of the oil gland secretion, including the hydrocarbons, exhibited strong allomonal properties against a model oribatid predator, the scydmaenid beetle, Euconnus (Tetramelus) oblongus. Considering the widespread semiochemical properties of oil gland secretions in astigmatid mites (=a highly derivative oribatid group), these results furnish evidence for a phylogenetically early origin of defensive and communicative roles of oil gland secretions in oribatids. These roles include alarm communication, defence and the production of anti-fungal compounds.