Barbehenn, R.V. (2001) Roles of peritrophic membranes in protecting herbivorous insects from ingested plant allelochemicals. Archives of Insect Biochemistry and Physiology, 47 (2). pp. 86-99.
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Abstract
Four mechanisms by which peritrophic membranes (PMs) potentially protect herbivorous insects from ingested allelochemicals are reviewed: adsorption, ultrafiltration, polyanion exclusion, and the capacity of PMs to act as antioxidants. Most of the research on the protective roles of PMs against ingested allelochemicals has focused on their impermeability to tannins. Adsorption of tannins by the PMs in grasshoppers may limit their permeability, but ultrafiltration of tannin complexes in the caeca is an alternative explanation. Polyanion exclusion does not explain the impermeability of caterpillar PMs to tannins (polyphenolate anions). Ultrafiltration remains the most likely mechanism by which tannins, and other tested allelochemicals, are retained in the endoperitrophic space. Although the pores in PMs are too large to impede the passage of most free allelochemicals, large allelochemical complexes are retained. Such complexes form in the gut fluid of caterpillars between tannic acid, proteins, lipids, and polyvalent metal cations, and also in the gut fluid of grasshoppers (Melanoplus sanguinipes) between some amphiphilic allelochemicals (digitoxin) and surfactant micelles. Further work is needed to examine the role of PMs as antioxidants in vivo, such as their potential to bind catalytically-active metal ions
| Item Type: | Article |
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| Uncontrolled Keywords: | peritrophic membranes, Herbivorous insects, Antioxidants, Gut fluid and Tannic acid |
| Author Affiliation: | Department of Biology, University of Michigan, Ann Arbor |
| Subjects: | Plant Protection Plant Physiology and Biochemistry > Plant Physiology Plant Physiology and Biochemistry > Biochemistry |
| Divisions: | General |
| Depositing User: | Ms Ishrath Durafsha |
| Date Deposited: | 16 Jul 2014 10:08 |
| Last Modified: | 16 Jul 2014 10:08 |
| Official URL: | http://dx.doi.org/10.1002/arch.1039 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/13345 |
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