Lattaud C., Mora P., Garvin M., Locati Sylvain, Rouland C. (1999). Enzymatic digestive capabilities in geophagous earthworms : origin and activities of cellulolytic enzymes. In :
Diaz Cosin D.J. (ed.), Jesus J.B. (ed.), Trigo D. (ed.), Garvin M.H. (ed.). 6th international symposium on earthworm ecology. Pedobiologia, 43 (6), p. 842-850. International Symposium on Earthworm Ecology, 6. ISSN 0031-4056.
Titre du document
Enzymatic digestive capabilities in geophagous earthworms : origin and activities of cellulolytic enzymes
Année de publication
1999
Auteurs
Lattaud C., Mora P., Garvin M., Locati Sylvain, Rouland C.
In
Diaz Cosin D.J. (ed.), Jesus J.B. (ed.), Trigo D. (ed.), Garvin M.H. (ed.), 6th international symposium on earthworm ecology
Source
Pedobiologia, 1999,
43 (6), p. 842-850 ISSN 0031-4056
Colloque
International Symposium on Earthworm Ecology, 6.
This study compares the origin and activities of glycolytic enzymes present in the gut contents of some geophagous adult earthworms and demonstrates that all the species did not develop mutualistic relationships with the ingested microorganisms to digest soil organic matter. Although the glycolytic activities were rather weak in the earthworms studied, they possess quite a complete enzymatic system that allows to degrade root and fungal substrates available in soils. Millsonia anomala Omo. from Lamto (Côte d'Ivoire) and Hormogaster elisae Alvarez from El Molar (Madrid) developed a strong mutualistic earthworm-microflora digestion system for hydrolysing cellulose : cellulase produced by inested microflora is able to degrade cellulose to cellobiose, cellobiase released by the worm itself breaks down cellobiose into D-glucose. Both enzymes found in intestinal contents of Pontoscolex corethrurus Müll. from Palma Sola, Veracruz (Mexico) were produced by ingested soil microflora since they were not found in gut tissue culture. On the contrary, Polypheretima elongata Perr. from Sainte Anne (Martinique), Hyperiodrilus africanus Bedd. and Dichogaster terrae nigrae Omo. et Vld. from Lamto (Cîte d'Ivoire) possess a complete enzymatic system for hydrolyzing cellulose. They could synthesize cellulolytic enzymes, i.e. cellulase and cellobiase by themselves. In the course of their digestion, geophagous earthworms seem to display variable adaptive characters which are undoubtedly linked to the different ecological categories and niches. (Résumé d'auteur)
Plan de classement
Macrofaune [074FAUSOL03]
Descripteurs
LOMBRIC ; DIGESTION ; ENZYME LYTIQUE ; CELLULASE ; MATIERE ORGANIQUE ; SOL ; DEGRADATION DU SOL ; CULTURE DE TISSUS ; MICROFLORE ; SUBSTRAT ; CHAMPIGNON ; ETUDE EXPERIMENTALE ; ETUDE COMPARATIVE ; CELLOBIASE
Description Géographique
MEXIQUE ; VERACRUZ ; COTE D'IVOIRE ; MARTINIQUE
Localisation
Fonds IRD [F B010021118] ;
Bondy
Identifiant IRD
fdi:010021118
