Ultrastructure and distribution of antennal sensilla of parasitic wasp, Cotesia gregalis (Hymenoptera: Braconidae)

IF 2 3区 工程技术 Q2 ANATOMY & MORPHOLOGY
Le Liu, Ke Wei, Zhe Ren, Xiaoyi Wang
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引用次数: 0

Abstract

Cotesia gregalis Yang et Wei (Hymenoptera: Braconidae) is a gregarious koinobiont endoparasitic wasp attacking the larvae of fall webworm, Hyphantria cunea, an important invasive insect pest in China. To better understand the parasitic wasps' mating and parasitic behaviors, we examined the morphology of the antennae of adult C. gregalis, as well as the type, number, and distribution of antennal sensilla, via scanning electron microscopy. The antennae of female and male C. gregalis are filiform and comprise a scape, pedicel, and 16 flagellomeres. The female antennae are significantly shorter than those of male. A total of nine morphological types of antennal sensilla (mechanoreceptor and chemoreceptor) are presented in both sexes, including four mechanoreceptors (sensilla chaetica [two subtypes], sensilla trichodea and Böhm bristles); five chemoreceptors (sensilla basiconica [two subtypes], sensilla placodea, sensilla styloconica, and sensilla coelocapitula). There is no difference in the type and distribution of antennal sensilla between males and females, but the number and length of some antennal sensilla show sexual dimorphism. The functional morphology of the sensilla of C. gregalis is discussed by comparison with other parasitic wasps. These findings provide foundation for further research on the chemical communication and host localization mechanisms of C. gregalis.Research Highlights The first report of morphology and distribution pattern of the antennal sensilla in C. gregalis is discussed. A total of seven main types and nine antennal sensilla subtypes are observed in male and female C. gregalis. The type and distribution of antennal sensilla in males and females are identical; however, the number and length of certain antennal sensilla show sexual dimorphism.
寄生蜂 Cotesia gregalis(膜翅目:腕蜂科)触角感觉器的超微结构和分布
杨伟等(Cotesia gregalis Yang et Wei)(膜翅目:腕蜂科)是一种群居的共生内寄生蜂,寄生于中国重要的入侵害虫秋网蝽(Hyphantria cunea)的幼虫。为了更好地了解这种寄生蜂的交配和寄生行为,我们通过扫描电子显微镜研究了秃姬小蜂成虫触角的形态以及触角感觉器的类型、数量和分布。雌性和雄性巨蜥的触角均为丝状,包括一个喙、花梗和 16 个鞭毛。雌性触角明显短于雄性。雌雄触角共有 9 种形态类型的触角感觉器(机械感觉器和化学感觉器),包括 4 种机械感觉器(sensilla chaetica [two subtype]、sensilla trichodea 和 Böhm bristles);5 种化学感觉器(sensilla basiconica [two subtype]、sensilla placodea、sensilla styloconica 和 sensilla coelocapitula)。雌雄触角感觉器的类型和分布没有差异,但某些触角感觉器的数量和长度表现出性双态性。通过与其他寄生蜂的比较,讨论了巨蜂触角感觉器的功能形态。研究亮点 首次报道了巨蜂触角感觉器的形态和分布模式。在雌雄鳕鱼共观察到七种主要类型和九种触角感觉器亚型。雌雄触角感觉器的类型和分布完全相同,但某些触角感觉器的数量和长度表现出性双态性。
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来源期刊
Microscopy Research and Technique
Microscopy Research and Technique 医学-解剖学与形态学
CiteScore
5.30
自引率
20.00%
发文量
233
审稿时长
4.7 months
期刊介绍: Microscopy Research and Technique (MRT) publishes articles on all aspects of advanced microscopy original architecture and methodologies with applications in the biological, clinical, chemical, and materials sciences. Original basic and applied research as well as technical papers dealing with the various subsets of microscopy are encouraged. MRT is the right form for those developing new microscopy methods or using the microscope to answer key questions in basic and applied research.
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