Volatile fatty acids and methane production in relation to anaerobic carbohydrate fermentation in Oryctes nasicornis larvae (Coleoptera: Scarabaeidae)
Identifieur interne : 000588 ( France/Analysis ); précédent : 000587; suivant : 000589Volatile fatty acids and methane production in relation to anaerobic carbohydrate fermentation in Oryctes nasicornis larvae (Coleoptera: Scarabaeidae)
Auteurs : Colette Bayon [France]Source :
- Journal of Insect Physiology [ 0022-1910 ] ; 1980.
Descripteurs français
- Wicri :
- topic : Produit alimentaire, Glucose.
English descriptors
- KwdEn :
- Acetic, Acetic acid, Anaerobic, Anaerobic carbohydrate, Anaerobic conditions, Anterior intestine, Assay, Bayon, Calibration curve, Carbohydrate, Carboxymethylcellulase activity, Cellulase activity, Cellulose digestion, Coleoptera scarabaeidae, Colour change, Constant volume, Digestion, Digestive tract, Dilation, Electrometric measurements, Enzyme activities, Faecal, Faecal pellets, First part, Foodstuff, Formic acid, Functional convergence, Glucose, Glycosidase activities, Haemolymph, Higher termites, Hungate, Insect physiol, Intestinal, Intestinal contents, Intestinal epithelia, Intestinal segment, Intestinal wall, Intestine, Larva, Malpighian tubules, Melolontha, Melolontha melolontha, Mesenteric, Mesenteric contents, Mesenteric secretions, Mesenteron, Methane, Methane release, Midgut, Nasicornis, Nmoles, Nmoles methane, Organic matter, Oryctes, Oryctes larvae, Oryctes nasicornis, Pellet, Proctodeal, Proctodeal contents, Proctodeal dilation, Proctodeal dilation contents, Proctodeal valve, Proctodeum, Rectal chamber, Rectum, Redox, Retention times, Scarabaeidae, Scarabaeidae larvae, Second part, Termite, Tube digestif, Vfas, Whole animal.
- Teeft :
- Acetic, Acetic acid, Anaerobic, Anaerobic carbohydrate, Anaerobic conditions, Anterior intestine, Assay, Bayon, Calibration curve, Carbohydrate, Carboxymethylcellulase activity, Cellulase activity, Cellulose digestion, Coleoptera scarabaeidae, Colour change, Constant volume, Digestion, Digestive tract, Dilation, Electrometric measurements, Enzyme activities, Faecal, Faecal pellets, First part, Foodstuff, Formic acid, Functional convergence, Glucose, Glycosidase activities, Haemolymph, Higher termites, Hungate, Insect physiol, Intestinal, Intestinal contents, Intestinal epithelia, Intestinal segment, Intestinal wall, Intestine, Larva, Malpighian tubules, Melolontha, Melolontha melolontha, Mesenteric, Mesenteric contents, Mesenteric secretions, Mesenteron, Methane, Methane release, Midgut, Nasicornis, Nmoles, Nmoles methane, Organic matter, Oryctes, Oryctes larvae, Oryctes nasicornis, Pellet, Proctodeal, Proctodeal contents, Proctodeal dilation, Proctodeal dilation contents, Proctodeal valve, Proctodeum, Rectal chamber, Rectum, Redox, Retention times, Scarabaeidae, Scarabaeidae larvae, Second part, Termite, Tube digestif, Vfas, Whole animal.
Abstract
Abstract: Physico-chemical investigations into the conditions of cellulose digestion by Oryctes nasicornis larvae show that the intestinal contents constitute a reducing alkaline medium. The mesenteron presents facultative conditions and high pH values whereas in the proctodeum anaerobiosis is strict and the pH approaches neutrality. No cellulase activity is detected either in the gut walls or the contents. Among the products of polysaccharide fermentation, volatile fatty acids (VFA) and methane are identified. The VFAs are 3 or 4 times more concentrated in the mesenteron than in the proctodeal dilation and acetic acid predominates. The VFAs, which are also present in the haemolymph, must cross the intestinal barrier. Methane formation takes place exclusively in the proctodeal dilation from which it is released to the exterior.
Url:
DOI: 10.1016/0022-1910(80)90098-0
Affiliations:
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ISTEX:D10FB496CED9410252FC21DBCB81B12EBBBA9F60Le document en format XML
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No231, Laboratoire de Zoologie, Faculté des Sciences, Boulevard Gabriel, Université de Dijon, 21100 Dijon</wicri:regionArea><placeName><region type="region" nuts="2">Bourgogne-Franche-Comté</region><region type="old region" nuts="2">Bourgogne</region><settlement type="city">Dijon</settlement></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Insect Physiology</title><title level="j" type="abbrev">IP</title><idno type="ISSN">0022-1910</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1980">1980</date><biblScope unit="volume">26</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="819">819</biblScope><biblScope unit="page" to="828">828</biblScope></imprint><idno type="ISSN">0022-1910</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-1910</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acetic</term><term>Acetic 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digestif</term><term>Vfas</term><term>Whole animal</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Produit alimentaire</term><term>Glucose</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Physico-chemical investigations into the conditions of cellulose digestion by Oryctes nasicornis larvae show that the intestinal contents constitute a reducing alkaline medium. The mesenteron presents facultative conditions and high pH values whereas in the proctodeum anaerobiosis is strict and the pH approaches neutrality. No cellulase activity is detected either in the gut walls or the contents. Among the products of polysaccharide fermentation, volatile fatty acids (VFA) and methane are identified. The VFAs are 3 or 4 times more concentrated in the mesenteron than in the proctodeal dilation and acetic acid predominates. The VFAs, which are also present in the haemolymph, must cross the intestinal barrier. Methane formation takes place exclusively in the proctodeal dilation from which it is released to the exterior.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Bourgogne</li><li>Bourgogne-Franche-Comté</li></region><settlement><li>Dijon</li></settlement></list><tree><country name="France"><region name="Bourgogne-Franche-Comté"><name sortKey="Bayon, Colette" sort="Bayon, Colette" uniqKey="Bayon C" first="Colette" last="Bayon">Colette Bayon</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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