Andries J C
Cell Tissue Res. 1979 Oct 2;202(1):9-15. doi: 10.1007/BF00239216.
The metamorphosing midgut of Aeshna cyanea is characterized by the successive development of two tissues: the reticulated tissue and the imaginal epithelium. These tissues supply information concerning contacts between cells diverging in their developmental pathways although arising from the same stem cell population. In addition to small desmosomes, which bind reticulated to imaginal cells, the reticulated cells form invaginations into the apex of imaginal epithelial cells. The projections of the reticulated cells have enlarged tips, and numerous microfilaments run longitudinally along the length of these processes. It is suggested that the anchoring projections of these cells delay the casting off of the reticulated tissue into the lumen, and thus allow the development of the imaginal microvilli. These project into the dilated intercellular space filled with a glycoprotein material that separates imaginal and reticulated cells (Andries, 1972).
网状组织和成虫上皮。这些组织提供了有关在发育途径上不同但源自同一干细胞群体的细胞之间接触的信息。除了将网状细胞与成虫细胞结合的小桥粒外，网状细胞还向成虫上皮细胞的顶端形成内陷。网状细胞的突起有扩大的尖端，许多微丝沿着这些突起的长度纵向排列。有人认为，这些细胞的锚定突起会延迟网状组织向管腔的脱落，从而使成虫微绒毛得以发育。这些微绒毛伸入充满糖蛋白物质的扩张细胞间隙，该物质将成虫细胞和网状细胞分隔开（安德烈斯，1972年）。
