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林业科学 ›› 2020, Vol. 56 ›› Issue (10): 135-144.doi: 10.11707/j.1001-7488.20201015

• 论文与研究报告 • 上一篇    下一篇

白蛾周氏啮小蜂触角感受器性二型超微结构分析

孙伊阳1,覃东玉1,潘丽娜1,穆怡然2,杨艺新1,相伟芳1,朱耿平1,李敏1,*   

  1. 1. 天津市动植物抗性重点实验室 天津师范大学生命科学学院 天津 300387
    2. 南开大学生命科学学院 天津 300071
  • 收稿日期:2019-03-29 出版日期:2020-10-25 发布日期:2020-11-26
  • 通讯作者: 李敏
  • 基金资助:
    国家自然科学基金项目(31702058);国家自然科学基金项目(31201730);天津市自然科学基金项目(17JCQNJC14900);天津市自然科学基金项目(18JCYBJC96300)

Ultrastructure of Sexual Dimorphism in Antennal Sensilla of Endoparasitoid Chouioia cunea (Hymenoptera: Eulophidae)

Yiyang Sun1,Dongyu Qin1,Lina Pan1,Yiran Mu2,Yixin Yang1,Weifang Xiang1,Gengping Zhu1,Min Li1,*   

  1. 1. College of Life Science, Tianjin Normal University The Tianjin City Key Laboratory of Plant and Animal Resistant Tianjin 300387
    2. College of Life Science, Nankai University Tianjin 300071
  • Received:2019-03-29 Online:2020-10-25 Published:2020-11-26
  • Contact: Min Li

摘要:

目的: 通过对白蛾周氏啮小蜂雌、雄触角感受器超微结构的观察分析,可为了解昆虫触角的感受机制研究提供依据,为进一步探究各感受器内部结构、作用机制及相关功能奠定基础。方法: 利用扫描电镜观察雌、雄白蛾周氏啮小蜂触角感受器的形态结构、类型、数量和分布。共观察雌、雄蜂各10只,并对雌、雄触角感受器进行了详细描述、比较和分析。结果: 雌、雄蜂触角差异显著,雌蜂触角11节,雄蜂触角12节,且雄蜂触角柄节膨大。从雌、雄触角基部到末端,感受器的种类和数量呈逐渐增加的趋势。其中鞭节上的感受器数量最多、种类最丰富。从雌、雄蜂感受器种类上看,雌蜂比雄蜂多发现2种感受器,分别为腔锥形感器和乳状感器Ⅱ型。从雌、雄蜂感受器形态结构上看,雌蜂的毛形感器Ⅰ型比雄蜂更为细长。雄蜂的乳状感器Ⅰ型要明显比雌蜂长。新发现的乳状感器Ⅲ型其形态结构在雌、雄蜂上也有显著差异。从雌、雄蜂感受器的数量上看,雌蜂触角感受器总量约为雄蜂的2倍。毛型感器Ⅰ型、Ⅱ型、板状感器、刺形感器、乳状感器Ⅰ型、Ⅱ型的数量在雌、雄蜂触角上差异显著。雌蜂触角上数量最多的感受器为毛形感器Ⅰ型,雄蜂为毛形感器Ⅱ型。从感受器的分布上来看,毛形感器Ⅰ型在雌蜂触角鞭节各亚节皆有分布,但在雄蜂触角上多分布于索节,棒节少见。毛型感器Ⅱ型在雄蜂触角鞭节各亚节皆有分布,但在雌蜂触角上多见于棒节,索节上未见分布。结论: 雌、雄触角感受器性二型现象明显,感受器的形态结构、种类、数量和分布均有差异,推测其与雌、雄蜂触角感受器功能不同相关。

关键词: 白蛾周氏啮小蜂, 触角感受器, 寄生蜂, 扫描电镜, 性二型

Abstract:

Objective: The observation and analysis of the ultrastructure of the antennal sensilla of the male and female of Chouioia cunea (Hymenoptera: Eulophidae) can provide a basis for the research on the olfactory receptive mechanism of the C. cunea and lay a foundation for further exploring the internal structure, mechanism of action and related functions of each sensilla. Method: Scanning electron microscopy was used to observe the morphological structure, type, number and distribution of antennal sensilla of the male and female. A total of 10 males and 10 females were observed, and their antennal sensilla were described, compared and analyzed in detail. Result: The antennae of male and female were significantly different, with female of 11 sections, male of 12 sections, and male had swollen antennae scape. From the base of the antennae to the end of the antennae, the number and types of the sensilla increased gradually, among which the number and types of the sensilla on the flagellum were the most abundant. In terms of the types of the male and female sensilla, the female had two more sensilla than the male, which were sensilla mammilliformia Ⅱ and sensilla coeloconica. As for the morphological structure of the male and female sensilla, the sensilla trichodeaⅠof the female were longer than that of the male. The sensilla mammilliformia Ⅰ of the male was significantly longer than that of the female. The sensilla mammilliformia Ⅲ was newly discovered in our study, and there were significant differences in the morphological structure between male and female. The number of antennal sensilla of the female was about twice that of the male. There were significant differences in the number of Sensilla trichodea Ⅰ, Ⅱ, sensilla placodea, sensilla chaetica, sensilla mammilliformia Ⅰ and Ⅱ between male and female. The most abundant sensilla on the female antennae were the sensilla trichodea Ⅰ, while the sensilla trichodea Ⅱ had the largest number on the male antennae. From the perspective of the distribution of sensilla, sensilla trichodea Ⅰ was distributed in all the flagellar segment of the female antennae, but it was mostly distributed in the funicle of the male. The sensilla trichodea Ⅱ is distributed in each flagellar segment of the antennae of the male, but it is mostly found in the clava of the female antennae, but not in the funicle. Conclusion: The phenomenon of sexual dimorphism of antennal sensilla is obvious between the male and female, and the morphological structure, types, number and distribution of the sensilla are different, which could be related to the different functions of the antennal sensilla of male and female.

Key words: Chouioia cunea, antennal sensilla, parasitoid, scanning electron microscope, sexual dimorphism

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