ULTRASTRUCTURE OF THE HEPATOPANCREAS OF THE PACIFIC WHITE SHRIMP, PENAEUS-VANNAMEI (CRUSTACEA, DECAPODA)
ULTRASTRUCTURE OF THE HEPATOPANCREAS OF THE PACIFIC WHITE SHRIMP, PENAEUS-VANNAMEI (CRUSTACEA, DECAPODA)
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DOI：
10.1017/s002531540005222x
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发表时间：
1988-05-01
影响因子：
1.2
通讯作者：
SIS, RF
中科院分区：
文献类型：
--
作者：
CACECI, T;NECK, KF;SIS, RF
用透射电镜、扫描电镜和光学显微镜对14个南美白色对虾肝胰腺标本进行了观察。该器官的组织学和超微结构与其它十足目动物相似。在超微结构水平上，观察到B细胞在位于细胞侧质膜上的间隙连接的水平附近破裂，并将其大空泡的内容物排放到细胞间隙中。这种酶物质的流出可能是细胞从近端小管壁释放的机制：一个B细胞的破裂和崩溃可能类似于支撑拱的拱心石的移除，失去了支撑，缺乏结构上的适应性以保持内聚（在上皮中没有桥粒或交错），并且随着细胞间物质被消化，剩余的完整细胞塌陷到小管的内腔中。所有类型的单个细胞的溶解。sbd.R-、F-和B-细胞。sbd.可能有助于小管的消化酶的总补充。
Fourteen specimens of the hepatopancreas of the Pacific white shrimp, Penaeus vannamei, were prepared for examination with the transmission and scanning electron microscopes and with the light microscope. The histology and ultrastructure of this organ is similar to that seen in other Decapoda. At the ultrastructural level, it was observed that B-cells rupture at approximately the level of gap junctions located on the lateral plasma membranes of the cells, and discharge the contents of their large vacuoles into the intercellular space. This efflux of enzymatic material may be the mechanism by which cells are released from the wall of the tubule at the proximal end: the rupture and collapse of a B-cell may be analagous to the removal of the keystone which supports an arch. Deprived of support, and lacking structural adaptations for cohesion (there are no desmosomes or interdigitations in the epithelium) and with the intercellular material digested, the remaining intact cells collapse into the lumen of the tubule. The lysis of individual cells of all types .sbd.R-, F-, and B-cells .sbd. may contribute to the tubules'' total complement of digestive enzymes.