| 吕东，赵祜，赵兴鹏，赵明，张宏斌，赵国生，陈敏，王光宇,2020,圆柏大痣小蜂雌成虫触角、下颚须及产卵器感器超微结构观察[J].环境昆虫学报,(4):1028-1036 |
| 圆柏大痣小蜂雌成虫触角、下颚须及产卵器感器超微结构观察 |
| Ultrastructural observation of female adults antennae, maxipalp and ovipositor sensilla of Megastigmus sabinae Xu et He |
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| DOI： |
| 中文关键词: 圆柏大痣小蜂 超微结构 触角 下颚须 产卵器 |
| 英文关键词:Megastigmus sabinae Xu et He ultrastructure antennae maxipalp ovipositor |
| 基金项目:国家自然科学基金(31860210) |
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| 中文摘要: |
| 圆柏大痣小蜂Megastigmus sabinae Xu et He是危害祁连圆柏球果种仁的寡食性害虫，其幼虫在球果内蛀食胚乳，并随球果同步发育，致使种子成熟后有果无仁，严重影响祁连圆柏种子生产。观察和分析圆柏大痣小蜂雌成虫触角、下颚须及产卵器感受器形态特征，旨在为圆柏大痣小蜂进化和行为策略研究提供基础。运用扫描电镜技术对圆柏大痣小蜂雌成虫的触角、下颚须及产卵器上的感受器进行观察，并对各感受器的形态特征进行分析。圆柏大痣小蜂触角为膝状，由支角突、柄节、梗节、环节、索节（7节）和棒节（3节）共14亚节组成，触角总长1 797.56±24.29 μm，表面有Bohm氏鬃毛、板形感受器、毛形感受器、刺形感受器、锥形乳头状感器5种感器；下颚须由5节组成，第1节粗长，其余4节较细，表面有毛形感受器、刺形感受器、锥形感受器和栓锥形感受器4种感器；外产卵器由产卵鞘和产卵针组成，有毛形感受器、栓锥形感受器、半球形感受器和腔锥形感受器，产卵鞘长3.17±0.22 mm，表面具2类毛形感器，产卵针长5.01±0.41 mm，产卵针从基部开始，分为3个产卵瓣，外侧端部具“八”字形缺刻及2个腔锥形感器。圆柏大痣小蜂雌成虫触角、下颚须、产卵器上的感受器类型多样，形态变化丰富。不同感受器类型间存在一定差异，是圆柏大痣小蜂为适应生存而进化产生的适应性形态，不同感器形态与圆柏大痣小蜂寄主选择、产卵及交配策略具有一定的内在联系。本文首次对圆柏大痣小蜂的触角、下颚须、产卵器的感受器形态进行研究报道，为理解圆柏大痣小蜂的形态特征、进化和行为策略研究提供理了理论依据。 |
| 英文摘要: |
| Megastigmus sabinae Xu et He is an oligotrophic pest that harms the seed kernels of Sabina przewalskii Kom. The larvae eat endosperm in the cones and develop synchronously with the cones, resulting in fruitless seeds after the seeds mature. Seriously affect the seed production of Sabina przewalskii Kom. To observe and analyze the morphological characteristics of the antennae, maxipalp and ovipositor receptors of the female adult of M. sabinae, aiming to provide a basis for the research on the evolution and behavior strategies of the larvae of M. sabinae. Scanning electron microscopy was used to observe the antennae, maxipalp and the receptors on the ovipositor of the female adult of M. sabinae. The antennae of M. sabinae are knee-shaped, consisting of 14 subsections, radicula, scape, pedicel, annellus, funicle(7 sections), clava(3 sections）. Total length 24~29 μm, with Bohm bristles, placoid sensilla, trichoid sensilla, chaetica sensilla, basiconic mastoid sensilla on the surface; the maxipalp composed of 5 sections, the first section is thick and long, and the remaining 4 sections is thin, it has four types of sensors: trichoid sensilla, chaetica sensilla, styloconic sensilla and basiconic sensilla; The external ovipositor is composed of ovipositor sheath and specula speculae. It has a trichoid sensilla, coeloconic sensilla, misphaericis sensilla and styloconic sensilla. The ovipositor sheath is 3.17±0.22 mm long, with 2 types of trichoid sensilla on the surface, and the specula speculae is 5.01±0.41 mm long.The specula speculae starts at the base and is divided into 3 valves, and the outer end has an “eight” shape Notch and 2 styloconic sensilla. The female receptors on antennae, maxipalp and ovipositors of M. sabinae are diversal and rich in morphological changes. There are certain differences between different types of receptors, which are the adaptive morphology produced by the small mole of M. sabinae to adapt to survival. This article is the first report on the antennae, maxipalp and ovipositor receptors, and provides a theoretical basis for understanding the morphological characteristics, evolution, and behavioral strategies of the small mollusk. |
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