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Registros recuperados: 5
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Activity of glycolytic enzymes in the gut of Hormogaster elisae (Oligochaeta, Hormogastridae) IRD
Garvin, M.H.; Lattaud, C.; Trigo, D.; Lavelle, P..
The glycolytic enzymatic activities in the gut of the endogeic earthworm #Hormogaster elisae$ from El Molar (Madrid, Spain) were studied in order to determine its digestive capacity and to assess its alimentary regime. Most endogeic earthworms have weak enzymatic complement and they usually establish mutualistic relationships with soil microflora to digest some organic compounds. Therefore, the intestinal wall tissues were cultured in vitro to assess the origin of the glycolytic enzymes found in the gut and enzymatic activities were measured in both cultured tissues and culture media. #H. elisae$ had a wide but not very strong enzyme complement, since all substrates were degraded but most of them at a low rate. This species cannot produce cellulase and...
Tipo: Text Palavras-chave: LOMBRIC; DIGESTION; ENZYME LYTIQUE; CELLULASE; CULTURE IN VITRO; MICROFLORE; FAUNE DU SOL; ANALYSE DE VARIANCE; ETUDE REGIONALE; MUTUALISME; CHITINASE.
Ano: 2000 URL: http://www.documentation.ird.fr/hor/fdi:010022305
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Experimental Evolution of a Plant Pathogen into a Legume Symbiont Inra
Marchetti, M.; Capela, D.; Glew, M.; Cruveiller, S.; Chane-Woon-Ming, B.; Gris, C.; Timmers, T.; Poinsot, V.; Gilbert, B.L.; Heeb, P.; Médigue, C.; Batut, J.; Masson-Boivin, C..
Abstract /Rhizobia are phylogenetically disparate a- and b-proteobacteria that have achieved the environmentally essential functionof fixing atmospheric nitrogen in symbiosis with legumes. Ample evidence indicates that horizontal transfer of symbioticplasmids/islands has played a crucial role in rhizobia evolution. However, adaptive mechanisms that allow the recipientgenomes to express symbiotic traits are unknown. Here, we report on the experimental evolution of a pathogenic Ralstoniasolanacearum chimera carrying the symbiotic plasmid of the rhizobium Cupriavidus taiwanensis into Mimosa nodulating andinfecting symbionts. Two types of adaptive mutations in the hrpG-controlled virulence pathway of R. solanacearum wereidentified that are crucial for the...
Tipo: Journal Article Palavras-chave: SYMBIONTE; RHIBOZIUM; EVOLUTION; SELECTION NATURELLE; SYMBIOSE; PATHOGENICITE; MUTUALISME; NODULATION; INFECTION NATURAL SELECTION; SYMBIOSIS; PATHOGENICITY; HOST-PATHOGEN RELATIONSHIP.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011d7a04683&uri=/notices/prodinra1/2011/07/
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Ficus racemosa is pollinated by a single population of a single agaonid wasp species in continental South-East Asia Inra
Kobmoo, N.; Hossaert-McKey, M.; Rasplus, J.Y.; Kjellberg, F..
High specificity in the Ficus-agaonid wasp mutualism has lead to the assumption of a mostly 'one-to-one' relationship, albeit with some exceptions. This view has been challenged by new molecular data in recent years, but surprisingly little is known about local and spatial genetic structuring of agaonid wasp populations. Using microsatellite markers, we analysed genetic structuring of Ceratosolen fusciceps, the fig wasp pollinating Ficus racemosa, a fig tree species widely distributed from India to Australia. In sampling stretching from the south of China to the south of Thailand we found evidence for only a single pollinating wasp species in continental South-East Asian mainland. We found no evidence for the co-occurrence of cryptic species within our...
Tipo: Journal Article Palavras-chave: ALLOPATRIC SPECIATION; CRYPTIC SPECIES; FIG POLLINATING WASP; GENETIC STRUCTURING; MUTUALISM; SPECIFICITY;  GUEPE; POLLINISATION; SPECIATION; BIOGEOGRAPHIE; SPECIATION ALLOPATRIQUE; ESPECES CRYPTIQUES; STRUCTURATION GENETIQUE; MUTUALISME; SPECIFICITE.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010dc99a3ff&uri=/notices/prodinra1/2010/12/
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La flore dans le réseau RENECOFOR : avancées méthodologiques et premières tendances sur 10 ans Inra
Archaux, F.; Dupouey, J.L.; Heuze, P..
Tipo: Journal Article Palavras-chave: FLORE FORESTIERE; RESEAU RENECOFOR; MUTUALISME; NITROPHILIE; RICHESSE SPECIFIQUE; EVOLUTION TEMPORELLE.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20093a5930ce&uri=/notices/prodinra1/2009/07/
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One fig to bind them all : host conservatism in a Fig wasp community unraveled by cospeciation analyses among pollinating and nonpollinating fig wasps Inra
Jousselin, E.; van Noort, S.; Berry, V.; Rasplus, J.Y.; Ronsted, N.; Erasmus, J.C.; Greeff, J.M..
The study of chalcid wasps that live within syconia of fig trees (Moraceae, Ficus), provides a unique opportunity to investigatethe evolution of specialized communities of insects. By conducting cospeciation analyses between figs of section Galoglychia andsome of their associated fig wasps, we show that, although host switches and duplication have evidently played a role in theconstruction of the current associations, the global picture is one of significant cospeciation throughout the evolution of thesecommunities. Contrary to common belief, nonpollinating wasps are at least as constrained as pollinators by their host associationin their diversification in this section. By adapting a randomization test in a supertree context, we further confirm that...
Tipo: Journal Article Palavras-chave: ECOLOGIE COMMUNAUTAIRE; GUEPE; HOTE D'UTILISATION; MUTUALISME; RANDOMISATION; SPECIALISATION; SPECIATION COMMUNITY ECOLOGY; FIG WASPS; HOST UTILIZATION; MUTUALISM; PHYLOGENY; RANDOMIZATION; SPECIALIZATION; SUPERTREE.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009fff94508&uri=/notices/prodinra1/2011/06/
Registros recuperados: 5
Primeira ... 1 ... Última
 

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