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在線閱讀 --自然科學版 2020年6期《雞嗉子榕縮腹榕小蜂觸角形態及其感器的性二型》
雞嗉子榕縮腹榕小蜂觸角形態及其感器的性二型--[在線閱讀]
謝華, 李成星, 張媛, 李宗波
西南林業大學 生物多樣性保護學院, 云南省森林災害預警與控制重點實驗室, 云南 昆明 650224
起止頁碼: 531--538頁
DOI: 10.13763/j.cnki.jhebnu.nse.2020.06.012
摘要
使用環境掃描電鏡對縮腹榕小蜂雌雄蜂觸角及其感器類型、數量、分布等進行了詳細的觀察,分析了感器的形態性狀和生態適應性.縮腹榕小蜂觸角具有明顯的雌雄二型性,雌蜂觸角長862.75±20.65μm,由轉節、柄節、梗節和10個鞭小節組成的鞭節構成,分布著毛形感器、刺形感器(Ⅰ型和Ⅱ型)、錐形感器(Ⅰ型)、多孔板形感器(無溝型)、栓錐型乳突狀感器、蒲姆氏鬃毛6類7種感器;雄蜂觸角大幅度退化,長度僅為345.18±9.44μm,僅有柄節、梗節和1個觸角小節構成的鞭節,著生有毛形感器、錐形感器(Ⅱ型)、多孔板形感器(具溝型)、腔錐形感器、蒲姆氏鬃毛5類5種感器.雌蜂觸角感器數量明顯大于雄蜂,同類感器的長度、分布或其孔密度與雄蜂有著顯著的差異,這種適應性進化可能與雌蜂的果外寄主定位和產卵行為有關,雄蜂與果內配偶識別相聯系.研究結果將有助于進一步詮釋雌雄蜂不同進化壓力下的形態分化、繁殖行為和信息利用與分配策略.

Sexual Dimorphism in Antennal Morphology and Sensilla Ultrastructure of Apocrypta sp.(Hymenoptera:Agaonidae) in Ficus semicordata
XIE Hua, LI Chengxing, ZHANG Yuan, LI Zongbo
Key Laboratory of Forest Disaster Warning and Control in Yunnan Province, College of Biodiversity Conservation, Southwest Forestry University, Yunnan Kunming 650224, China
Abstract:
Antennae and its sensillum in the female and male Apocrypta sp.were examined by using environmental scanning electron microscope, and then were discussed on the basis of evolutionary adaptation of morphological characteristics.Apocrypta sp.has a typical sex dimorphism on the whole antennae.Antennae of female fig wasps are 862.75±20.65μm in length,and consist of a radicula, scape, pedicel,and flagellum which is composed of 10 flagellomeres.Seven morphological sensillar types were identified in females,including trichoid sensilla,chaetica sensilla (type Ⅰ and Ⅱ),basiconic sensilla (type Ⅰ),multiporous placoid sensilla (non-grooved types), basiconic capitate peg sensilla,and böhm's bristles.Antennae of male fig wasps are substantially reduced,345.18±9.44μm in length,and comprised of a scape, pedicel and flagellum that contains 1 antennomere.Five sensillar types were found in males,including trichoid sensilla,basiconic sensilla (type Ⅱ),multiporous placoid sensilla (grooved types),coeloconic sensilla, and böhm's bristles.The abundance of antennal sensilla of female far exceeded that of males.Significant differences were observed in the sensillar morphology,distribution,or pore density of the same type of antennal sensilla between female and male fig wasps.The pressure-adaptive morphology of the various types of the antennal sensilla demonstrated the positive dependence on the morphological division and ecological adaptation.Due to different ecological functions of females and males, they produced the pressure-adaptive morphologies,which correlated with the oviposition behaviors of females and with the mate choice of males in fig cavity.Our results will facilitate the understanding of the intrinsic relationships between the morphological division,reproductive behavior,and chemical utilization and partition in the sexual selection of fig wasps.

收稿日期: 2019-09-20
基金項目: 國家自然科學基金(31760107,31100279);云南省“高層次人才培養支持計劃”青年拔尖人才項目(51900110)

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