Peritrophic membranes are secretion products of the midgut. For long they have been related only to insects, but they occur widely in the animal kingdom. They effect a part of the gut lumen and function not only as a mechanical protection barrier, but also as an ultrafilter, a barrier to parasites, and as envelopes for fecal pellets. Such peritrophic envelopes are of great ecological importance in marine environments. The book is divided into the following themes: - Occurrence - Formation and Structure - Degradation - Chemical Composition - Functions. It is the first comprehensive compilation of all data concerning peritrophic membranes and will provide a basis for future researches in this up to now often neglected field.
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Formation and Structure
Degradation of Peritrophic Membranes
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acid adult blowflies Aedes aegypti Anopheles stephensi Aubertot bacteria Becker blood meal blowfly branes caeca Calliphora erythrocephala cardia chitin chitosan chitosan test cocoon copepods Culex cuticle degradation dextran diameter digestion Diptera ectoperitrophic space electron microscopic electron-dense layer enzymes epithelium side fecal pellets flies food residues Forficula auricularia formation of peritrophic formation rate formation zone formed peritrophic membrane Georgi glycoproteins hemolymph hindgut incubation ingested inner peritrophic membrane insects investigated labeled larvae lectins lumen side material membranes are secreted microfibrils microfilariae microvilli midgut cells molecular weight Nematocera observed occur ookinetes OOOx orthogonal texture penetrate the peritrophic peritrophic envelope peritrophic mem peritrophic membrane PM peritrophic membranes permeability Peters posterior midgut protein proteoglycans random texture salps secrete peritrophic membranes secretion of peritrophic Sect single peritrophic membrane species staining structure surface texture of microfibrils thickness tsetse fly valvula cardiaca Vierhaus vitro Waterhouse 1953a Zhuzhikov Zimmermann