Is gut p H regulated by midgut endocrine system in larvae of Rhynchophorus ferrugineus Fab.
Year: 1999
Type: article
Abstract: Midgut of the larvae of R. jerrugineus can be divided into anterior saccular midgut, anterior tubular midgut, posterior saccwlar midgut and posterior tubular midgut. pH of the contents in the anterior saccular midgut was 5-5.4. Effect of extracts of midgut epithelium on maintenance of gut pH in the final instar larvae has been studied employing an in vitro method. For this, ligated tubes of the anterior saccular midgut filll!d with pH indicator - buffer solutions having pH either 4 or 7 were incubated with midgut epithelial extract in a bioassay apparatus at 37°C. pH of the contents of midgut preparations changed to normal range following incubation with epithelial extract as indicated by turning of colours. No change in colour was observed in controls incubated with insect saline for 60 min. TIle effect is both dose and time dependent. The midgut epithelial factor regulating pH in gut lumen could be a hormone. in insects, secretogogue, endocrine and neural mechanisms are proposed to be involved in the regulation of digestive enzyme secretion I . It is known that varying conditions of pH along the alimentary canal influence the activities of different enzymes and facilitate the sequential digestion of food materials 2
Authors: Sunitha Venkatesh, T.R. Reena, S. Harshini, S. Sreekumar
Language: English
Subfield: Cellular and Molecular Neuroscience
Field: Neuroscience
Domain: Life Sciences
Open Access status: diamond
OpenAlex ID: W2339728795