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Structures of ovary and ovarian follicle in flathead lobster,thenus orientalis (Lund, 1793) (Crustacea: Decapoda: Scyllarida)

引用

Acta Oceanologica Sinica 2001年第2期20卷 241-250页

作者： Zhu Dongfa, Li Shaojing, Wang Guizhong (1. Department of Oceanography, Xiamen University, Xiamen 361005, China 2. Faculty of Life Science and Biotechnology, Ningbo University, Ningbo 315211, China) Department of Oceanography Xiamen University Faculty of Life Sci./Biotechnology Xiamen 361005 China

The ovary contains four morphological components: (1) the ovarian wall, (2) the reproductive epithelium, (3) the cellular layer containing oocytes, oogonia (especially for early-developing ovary) and follicle cells, and (4) the extensions of the ovarian wall. The ovarian wall and its extensions consist of blood vessels, sinuses, muscle cells and others. The extensions of the ovarian wall project into among the follicles and insert on the thick basal membrane of each follicle. From inside to outside, the follicles are composed of four parts: (1) the oocyte, (2) the perivitelline space, (3) the follicle cells, and (4) the basal membrane. The surface of the oocyte during vitellogenesis is folded into numerous long microvilli that project into the perivitelline space between the oocyte surface and the bace of the follicle cell layer. In addition, the plasma membrane of the vitellogenic oocyte contains many pinocytotic pits. The perivitelline space is engorged with with more electron- denser material as the development of the follicle. The inclusion of perivitelline space in the mature follicle is named specially as the chorine. The chorion is composed of two region, a thinner exochorion and a thicker endochorion containing electron-dense granular material. The follicle cell layer is composed of a single layer of polygonal follicle cells which exhibit higher synthetic activity. The synthetic product of the follicle cell layer is one scarce for the inclusion of the perivitelline space. The structures of the ovary and ovarian follicle in T. orientalis show that the exogenously biosyn- thetic yolk plays important roles in the vitellogenesis.

关键词： thenus orientalis ovary follicle chorion formation

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