横坑切梢小蠹幼虫触角与口器化学感器的超微结构  

Ultrastructure of chemical sensilla on the antennae and mouthparts of the larvae of Tomicus minor (Coleoptera: Curculionidae: Scolytinae)

作　　者：鲁国艳 朱海迪 杨培 杨斌[1] 李宗波[1] LU Guoyan;ZHU Haidi;YANG Pei;YANG Bin;LI Zongbo(Key Laboratory of Forest Disaster Warning and Control in Yunnan Province,College of Biodiversity Conservation,Southwest Forestry University,Kunming,Yunnan 650224,China;Yunnan University of Chinese Medicine,Kunming,Yunnan 650500,China)

机构地区：[1]西南林业大学生物多样性保护学院/云南省森林灾害预警与控制重点实验室,云南昆明650224 [2]云南中医药大学,云南昆明650500

出　　处：《生物安全学报（中英文）》2024年第3期291-299,共9页Journal of biosafety

基　　金：云南省基础研究重点项目(202101AS070009、2018FG001-010);云南省林业领域重点研发计划项目(202302AE090017);兴滇英才支持计划(YNWR-QNBJ-2018-131)。

摘　　要：【目的】了解横坑切梢小蠹幼虫触角和口器上化学感器的类型、数量和分布。【方法】应用扫描电子显微镜观察了横坑切梢小蠹末龄幼虫头部形态及触角和口器上的化学感器。【结果】横坑切梢小蠹幼虫触角仅有1节,着生有2类6种感器,分别为锥形感器1~2和末梢锥形感器1~4;下颚须和下唇须均为2节,共发现有3类5种感器,包括锥形感器3、指形感器、末梢锥形感器2、4和5。锥形感器1~3表面具多孔,为典型的嗅觉器官;末梢锥形感器顶端具孔,应为味觉感器;指形感器为下颚须特有,每侧仅有1个,光滑、无孔表面可能意味其具有声音感知功能。【结论】横坑切梢小蠹末龄幼虫头部化学感器数量少,分布模式简单,且集中分布在触角、下颚须和下唇须的端部,研究将为深入理解横坑切梢小蠹幼虫取食及其相关行为提供科学依据。【Aim】To investigate the type,number,and distribution of chemical sensilla on the antennae and mouthparts of the larvae of Tomicus minor(Coleoptera:Curculionidae:Scolytinae).【Method】Chemical sensilla on the larval head of the last instar T.minor was examined using scanning electron microscopy.【Result】The larval antennae of T.minor have only one segment that bears six types of sensilla,including sensilla basiconica 1-2 and sensilla twig basiconica 1-4.Both the maxillary and labial palps consist of two segments with five sensory organ types.These were identified as sensilla basiconica 3,sensilla digiformia,and sensilla twig basiconica 2,4,and 5.Sensilla basiconica 1-3 with multiple surface pores may play a typical role in odor sensing of chemicals in the larval gallery.Sensilla twig basiconica with tip pores should be interpreted as having a gustatory function.Sensilla digitiformia with a smooth and nonporous surface were presumed to be sensible to sound production in Scolytinae because only one sensilla digiformia was found on the lateral view of the maxillary palp.【Conclusion】Chemical sensilla on the larval head of the last instar of T.minor exhibited a low abundance,a simple distribution pattern,and an unchanged concentration on the tips of the antennae,maxillary,and labial palp.The findings of this study are expected to provide further scientific data for a deeper understanding of the feeding and related behaviors of the larvae of T.minor under bark.

关 键 词：横坑切梢小蠹 幼虫 触角 口器 化学感器 超微结构 

分 类 号：S433.5[农业科学—农业昆虫与害虫防治]