花椒窄吉丁成蟲觸角感器超微結構1)

袁麗芳　謝壽安　劉綏鵬　呂淑杰　郭新榮　宋曉斌

(西北農林科技大學，楊凌，712100)

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花椒窄吉丁成蟲觸角感器超微結構1)

袁麗芳謝壽安劉綏鵬呂淑杰郭新榮宋曉斌

(西北農林科技大學，楊凌，712100)

采用掃描電子顯微鏡對花椒窄吉丁(Agriluszanthoxylumi)雌雄成蟲觸角進行觀察，明確了花椒窄吉丁雌雄成蟲觸角感受器的類型、數量和分布位置及兩性感受器的差異性。結果表明：在雌雄成蟲觸角上均發現6類17種感受器：3種毛形感器、4種刺形感器、7種錐形感器、1種鐘形感器、1種芽形感器和1種特殊感器。此外在雄蟲觸角上還發現B?hm氏鬃毛。花椒窄吉丁觸角感受器的分布位置相對穩定，觸角兩側面主要分布毛形感器，背腹面主要分布毛形感器和刺形感器。觸角第Ⅳ-Ⅺ節端部有1個凹窩，凹窩內主要分布錐形感器，凹窩旁的凹陷中有1個錐形感器簇，但第Ⅹ-Ⅺ節的錐形感器簇不明顯。雌雄成蟲的6類17種感器在分布位置上無明顯差異，但是觸角鋸齒部分的或第Ⅳ-Ⅺ節端部錐形感器在數量上雄蟲顯著多于雌蟲。

花椒窄吉丁；觸角；感器；掃描電鏡；超微結構

We observed the sensilla on the antenna ofAgriluszanthoxylumiby using scanning electron microscopy to know the ultrastructure, type, number, distribution of sensilla on the antenna ofAgriluszanthoxylumi, and the differences of sensilla between male and female. The internal and external sides of the antenna have sensilla trichodeas, sensilla trichodeas and sensilla chaeticas were distributed over segmental venter and the back side. There is a fossa on the apex of every flagellomerefrom fourth to eleventh, and sensilla basiconicas were mainly distributed over it. Sensilla basiconicas cluster in the sunken place, where is the fossa, but the sensilla basiconicas cluster is not obvious on the tenth and eleventh flagellomeres. There are 6 types (17 kinds) of sensilla on the antenna of male and female including 3 kinds of sensilla trichodeas, 4 kinds of sensilla chaeticas, 7 kinds of sensilla basiconicas, 1 kind of sensilla campaniformia, 1 kind of sensilla gemmformium and 1 kind of unusual sensilla, and B?hm bristles were on the antenna of male. The distribution of sensilla is relatively stable, the 6 types of sensilla have no difference in distribution between male and female adults, but the number of sensilla basiconicas on apex of antenna of the male is significantly more than the number of the female.

昆蟲敏銳的嗅覺依賴于觸角感受器對外界刺激和內部神經系統的調控，以及對內外化學信號的感受識別[1]，在昆蟲的取食、交配和寄主定位等行為選擇中具有重要意義。

目前對昆蟲觸角感器的研究主要集中在鞘翅目、鱗翅目、直翅目、同翅目、半翅目、膜翅目、雙翅目和纓翅目[2-4]。鞘翅目中對天牛科、小蠹科、金龜科、步甲科等研究的較多[5]，吉丁蟲是重要的林木鉆蛀害蟲，但是對其觸角感器的研究較少。……