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Study on the Detection of In vivo and In vitro Hemocytic Pathway in Grasshopper, Euprepicnemis shirakii  

Chang, Byung-Soo (Department of Clinical Pathology, Dongnam Health College)
Publication Information
Applied Microscopy / v.33, no.2, 2003 , pp. 131-143 More about this Journal
Abstract
A Differentiating pathway of hemocytes in vitro and in vivo of grasshopper, Euprepocnemis shirakii was described using light and electron microscopes. In the interior of body, the stem cells of the hemopoietic organ differentiated into six types of cells respectively which are prohemoyte, plasmatocyte, granulocyte I, granulocyte II, spherulocyte and oenocytoid. The formation of these hemocytes was derived from the stem cells surrounded by a reticular cell. Hemopoietic tissue cultured in the insect media differentiated different hemocytes, but none of them underwent any mitotic division. Morphological features of the cultured cells in media were essentially the same as those of the hemocytes differentiated from the stem cells in vivo. These results were shown that each stem cell could differentiate into different types of hemocytes. It was confirmed that the stem cells possessed the pluripotent differentiation ability to directly each hemocyte, and that the once formed hemocytes in vivo and in vitro didn t undergo further transformation to other hemocytes. The maintenance of circulating hemocytes in grasshopper had been depended on the widely spreading hemopoietic organ situated in the upper surface of the dorsal alary muscle and located on the first to eighth segments.
Keywords
Grasshopper; Hemopoietic organ; Hemocytic pathway;
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