Histology of the hepatopancreas of the freshwater prawn Palaemonetes argentinus (Crustacea, Caridea).
Histology of the hepatopancreas of the freshwater prawn Palaemonetes argentinus (Crustacea, Caridea).
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发表时间：
2000-12
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通讯作者：
L. Sousa;A. Petriella
中科院分区：
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作者：
L. Sousa;A. Petriella
本研究的目的是描述的组织学结构的P. argentinus在蜕皮间期阶段，以提供一个基线，为未来的分析其修改作为环境胁迫的指标。成年人在两性的性休息，从Sotelo流，支流的Mar Chiquita泻湖，阿根廷（38 ° S 55 ° W）。采用组织学技术对阿根廷对虾肝胰腺进行了研究。肝胰腺是一个双侧双叶的棕黄色器官。该结构由大量盲管形成，管间空间稀少。每个小管由一个圆柱形的上皮层，由基膜和肌上皮细胞包围。四种类型的细胞被确认为代表E（胚胎），F（纤维状），R（吸收）和B（水泡状）细胞的其他十足类。有丝分裂中发现E细胞，一些F细胞有细胞死亡的迹象。在全分泌分泌的不同阶段观察到B细胞，并且在内侧和近端区出现一些脱落细胞群，揭示了重要的细胞周转率。根据这些观察，F、R和B细胞独立于E细胞分化。
The aim of this study is to describe the histological structure of the hepatopancreas of P. argentinus in intermoult stage in order to provide a baseline for future analysis of its modifications as indicator of environmental stress. Adults at sexual rest of both sexes were collected from Sotelo stream, tributary of Mar Chiquita lagoon, Argentina (38 degrees S 55 degrees W). P. argentinus hepatopancreas was studied by using histological techniques. The hepatopancreas is a bilaterally bilobed brown-yellowish organ. The structure is formed by a mass of blind tubules, with scarce intertubular space. Each tubule consists of a cylindrical epithelial layer surrounded by a basal lamina and myoepithelial cells. Four cellular types were recognized which represent E (embryonic), F (fibrillar), R (resorptive) and B (blisterlike) cells of other decapods. E-cells were found in mitosis and some F-cells had signs of cellular death. B-cells were observed in different phases of holocrine secretion and some groups of desquamated cells appeared at medial and proximal zones, revealing an important cellular turnover rate. According to these observations F, R and B cells are differentiated independently from E-cells.