| 摘要: |
| 软体动物的早期发育研究对于理解其发育及演化机制有重要意义。利用扫描电子显微镜对笠贝（Lottia goshimai）的早期发育过程进行研究，结果表明，笠贝早期发育过程十分迅速，受精后9 h左右即形成担轮幼虫，在24 h内发育为典型的面盘幼虫。扫描电镜下，可以观察到原肠作用中很有特色的外包式的细胞运动过程，并清晰地观察到前担轮环、贝壳形成区以及足原基的渐次发育。总体而言，笠贝的早期发育过程既体现了等裂型软体动物发育的典型过程（如外包式原肠作用），又展现出腹足纲动物的种系特异性特点（如贝壳的生长方向）。研究结果可以为深入解析笠贝早期发育机制提供基础支持。 |
| 关键词: 笠贝 原肠作用 贝壳 足 前担轮环 |
| DOI：10.11693/hyhz20210300068 |
| 分类号:Q344 |
| 基金项目:国家自然科学基金项目,41776157号。 |
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| EARLY DEVELOPMENT OF LOTTIA GOSHIMAI REVEALED BY SCANNING ELECTRON MICROSCOPY |
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CUI Meng-Lu1,2, HUAN Pin1, LIU Bao-Zhong1
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1.Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| Researches on the early development of mollusks are essential to understand the mechanisms of molluscan development and evolution. We investigated the early development of the limpet Lottia goshimai using scanning electron microscopy (SEM). Results of SEM revealed quick development of this species:the trochophore larva formed at around 9 hpf and typical veliger larva emerged at 24 hpf. The development of L. goshimai mainly included the characteristic epibolic gastrulation and the development of various structures such as prototroch, shell field, and foot anlagen. In general, the early development of L. goshimai exhibited characters of an equal cleaver (e.g., the epibolic gastrulation) and also species-specific characteristics of the gastropod lineage (e.g., the larval shell growth toward the ventral side through the posterior pole). The findings provide a basic support for in-depth study of the molecular mechanisms of early development of L. goshimai. |
| Key words: Lottia goshimai gastrulation shell foot prototroch |
