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陈俊吕,郑伟,郭文锋,周晓果,温远光,王磊,李晓琼.桉树枝瘿姬小蜂雌雄个体感器差异比较[J].广西科学,2026,33(3):676-684. [点击复制]
- CHEN Junlü,ZHENG Wei,GUO Wenfeng,ZHOU Xiaoguo,WEN Yuanguang,WANG Lei,LI Xiaoqiong.Comparison of Sexual Dimorphism in Sensilla of Leptocybe invasa[J].Guangxi Sciences,2026,33(3):676-684. [点击复制]
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| 桉树枝瘿姬小蜂雌雄个体感器差异比较 |
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陈俊吕1, 郑伟1, 郭文锋2, 周晓果3, 温远光3, 王磊1, 李晓琼1
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| (1.广西大学林学院, 广西森林生态与保育重点实验室, 广西南宁 530004;2.广西农业科学院, 广西作物遗传改良生物技术重点开放实验室, 广西南宁 530007;3.广西科学院生态环境研究所, 广西南宁 530007) |
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| 摘要: |
| 昆虫感器形态、分布等特征与其特异性生态行为相关。探究外来入侵物种桉树枝瘿姬小蜂(Leptocybe invasa)雌雄个体感器的种类、形态、分布及性二型特征，对揭示其生态学机制具有重要意义。本研究采用扫描电子显微镜对雌雄个体触角和腹部感器的形态、超微结构进行观察。结果表明：雌雄个体触角的形态结构存在明显差异，雌虫为“4节环状节+3节索节”，而雄虫为“3节环状节+4节索节”，该特征可作为桉树枝瘿姬小蜂性别鉴别的形态学依据。雌虫索节和棒节上特异性分布有大量毛形感器Ⅰ型(Trichodea sensilla typeⅠ，Tri-Ⅰ)、板形感器Ⅱ型(Placoid sensilla typeⅡ，Pla-Ⅱ)和钟形感器(Campaniform sensilla，Cam)；雄虫则在索节上具有独特的乳形感器(Mammilliformia sensilla，Mam)，并在棒节上特异性分布有带状感器(Zonated sensilla，Zon)。与雌虫相比，雄虫支角突上Böhm氏鬃毛Ⅰ型和Ⅱ型(Böhmhm bristles type Ⅰ and type Ⅱ，B-Ⅰ、B-Ⅱ)、索节和棒节上毛形感器Ⅱ型(Trichodea sensilla typeⅡ，Tri-Ⅱ)以及索节上板形感器Ⅰ型(Placoid sensilla typeⅠ，Pla-Ⅰ)的尺寸均显著增加。此外，雄虫腹部具有特异性结构B-Ⅱ，其Tri-Ⅰ和刺形感器(Chaeticum sensilla，Cha)的尺寸也显著大于雌虫。腔锥形感器(Coeloconica sensilla，Coe)在雌虫中呈圆形，在雄虫中则为椭圆形。桉树枝瘿姬小蜂触角和腹部感器具有明显的性二型特征，雌虫感器特化于寄主定位与产卵选择，而雄虫感器则适应于配偶搜寻与交配定位。这一发现可从形态学层面阐释其行为适应的内在机制，同时为开发性别特异性的绿色防控策略提供关键理论依据。 |
| 关键词: 桉树枝瘿姬小蜂 感器 性二型 超微结构 扫描电子显微镜 |
| DOI：10.13656/j.cnki.gxkx.20260708.020 |
| 投稿时间：2025-12-09修订日期：2026-01-02 |
| 基金项目:广西自然科学基金项目(2024GXNSFAA010457)，广西科技基地和人才专项(桂科AD25069066)，国家自然科学基金项目(32360391)，广西研究生教育创新计划资助项目(YCSW2025113)，大学生创新创业训练计划项目(S202510593484)资助。 |
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| Comparison of Sexual Dimorphism in Sensilla of Leptocybe invasa |
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CHEN Junlü1, ZHENG Wei1, GUO Wenfeng2, ZHOU Xiaoguo3, WEN Yuanguang3, WANG Lei1, LI Xiaoqiong1
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| (1.Guangxi Key Laboratory of Forestry Ecology and Conservation, College of Forestry, Guangxi University, Nanning, Guangxi, 530004, China;2.Guangxi Crop Genetic Improvement and Biotechnology Laboratory, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China;3.Institute of Eco-Environmental Research, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China) |
| Abstract: |
| The morphology and distribution of insect sensilla is associated with their species-specific ecological behaviors.Investigating the types,morphology,distribution,and sexual differences of sensilla in Leptocybe invasa,an invasive alien species,is of great significance for revealing its ecological mechanisms.This study employed scanning electron microscopy to characterize the morphology and ultrastructures of antennal and abdominal sensilla in both sexes.The results revealed significant sexual divergence in antennal structure:female antennae comprised four annular segments+three funicular segments,whereas male antennae consisted of three annular segments+four funicular segments,providing a reliable morphological trait for sex identification.The distribution of sensilla also exhibited sex-specific patterns.Females specially showed abundant Trichodea sensilla type Ⅰ (Tri-Ⅰ),Placoid sensilla type Ⅱ (Pla-Ⅱ),and Campaniform sensilla (Cam) on both funicle and club segments.Males uniquely possessed Mammilliformia sensilla (Mam) on the funicle and Zonated sensilla (Zon) restricted to the club.Comparative measurements indicated that males possessed significantly larger Böhm bristles type Ⅰ and type Ⅱ (B-Ⅰ,B-Ⅱ) on the antennifer,Trichodea sensilla type Ⅱ (Tri-Ⅱ) on the funicle and club,and Placoid sensilla type Ⅰ (Pla-Ⅰ) on the funicle.Additionally,males exhibited a distinctive abdominal structure bearing B-Ⅱ,along with markedly larger Tri-Ⅰ and Chaeticum sensilla (Cha) than females.Coeloconica sensilla (Coe) were circular in females but elliptical in males.These findings demonstrate pronounced sexual dimorphism in the sensilla of L.invasa,reflecting functional specialization:female sensilla are adapted for host location and oviposition site selection,whereas male sensilla are optimized for mate searching and mating localization.This study not only elucidates behavioral adaptation mechanisms at the morphological level but also offers a theoretical foundation for developing sex-specific eco-friendly control strategies. |
| Key words: Leptocybe invasa sensilla sexual dimorphism ultrastructure scanning electron microscope |
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