Rectal ultrastructure in salt- and freshwater mosquito larvae in relation to physiological state
Rectal ultrastructure in salt- and freshwater mosquito larvae in relation to physiological state
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DOI：
10.1007/bf00307074
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发表时间：
1973-03
期刊：
影响因子：
--
通讯作者：
J. Meredith;J. Phillips
中科院分区：
文献类型：
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作者：
J. Meredith;J. Phillips
本文比较了淡水蚊（埃及伊蚊）和咸水蚊（campestris伊蚊）的直肠形态和超微结构。产高渗和低渗尿液的野蚊幼虫。a的上皮。埃及伊蚊含有一种细胞类型，其特征是顶膜和基膜都折叠，侧缘直，线粒体分布均匀。a的直肠。campestris包含不同的前部和后部区域，每个区域由单一细胞类型组成。这两个区域可以根据细胞的厚度、顶端折叠的深度和线粒体的分布来区分。前区类似于a的直肠。埃及伊蚊，而后区域被认为是咸水物种所特有的，因此可能与高渗尿的形成有关。在子宫内膜上，顶膜（而不是侧膜或基膜）可能是产生高渗尿的部位。讨论了这一过程的两种可能机制。
A comparison of rectal morphology and ultrastructure is made between a freshwater (A. aegypti) and salt water (A. campestris) species of mosquito larvae, and betweenA. campestrislarvae producing hyper- and hyposmotic urine.The epithelium ofA. aegypticontains one cell type characterized by infolding of both the apical and basal membranes, straight lateral borders, and evenly distributed mitochondria.The rectum ofA. campestriscontains distinct anterior and posterior regions, each made up of a single cell type. These two regions can be distinguished on the basis of cell thickness, depth of apical infolding and distribution of mitochondria. The anterior region is similar to the rectum ofA. aegypti, while the posterior region is considered unique to the salt-water species and hence probably is associated with the formation of hyperosmotic urine.InA. campestris, the apical (rather than lateral or basal) membranes are probably the site of hyperosmotic urine production. Two possible mechanisms for this process are discussed.