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Registros recuperados: 5
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Does forest liming impact the enzymatic profiles of ectomycorrhizal communities through specialized fungal symbionts ? Inra
Rineau, F.; Garbaye, J..
Liming (Ca–Mg soil amendment) is a forestry practice used to correct soil acidification and restore health and productivity in declining stands. Liming is known to modify tree mineral nutrition beyond the sole Ca and Mg. We hypothesized that liming also modifies the very functioning of the tree absorbing system (that is the ectomycorrhizal fine roots) in a way that facilitates the mobilization of mineral nutrients, particularly those entrapped in soil organic matter. This hypothesis has been tested here in beech and Norway spruce stands in North-Eastern France. In autumn, we compared the ectomycorrhizal community structure and the enzymatic profiles of ectomycorrhizal root tips in limed and untreated plots by measuring the activities of eight enzymes...
Tipo: Journal Article Palavras-chave: ABIES L. KARST.; NORWAY SPRUCE; FUNCTIONAL DIVERSITY; MYCORRHIZAL FUNGI; SOIL; ACIDIFICATION; SECRETION; NUTRITION; ENZYMES; PLANTS; CA–MG SOIL AMENDMENT; ECTOMYCORRHIZAL COMMUNITY; SECRETED ENZYMATIC ACTIVITIES; NUTRIENT MOBILIZATION; FUNCTIONAL SPECIALIZATION.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20109694fcef&uri=/notices/prodinra1/2010/10/
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Gene transcription in Lactarius quietus-Quercus petraea ectomycorrhizas from a forest soil Inra
Courty, P.E.; Poletto, M; Duchaussoy, F.; Buee, M.; Garbaye, J.; Martin, F..
Extracting fungal mRNA from ectomycorrhizas (ECMs) and forest soil samples for monitoring in situ metabolic activities is a significant challenge when studying the role of ECMs in biogeochemical cycles. A robust, simple, rapid, and effective method was developed for extracting RNA from rhizospheric soil and ECMs by adapting previous grinding and lysis methods. The quality and yield of the extracted RNA were sufficient to be used for reverse transcription. RNA extracted from ECMs of Lactarius quietus in a 100-year-old oak stand was used to construct a cDNA library and sequence expressed sequence tags. The transcripts of many genes involved in primary metabolism and in the degradation of organic matter were found. The transcription levels of four...
Tipo: Journal Article Palavras-chave: ECTOMYCORHIZE AMINO ACIDS; ECTOMYCORRHIZAS; FOREST SOILS; GENE EXPRESSION; GLUTAMATE-AMMONIA LIGASE; METABOLISM; MYCORRHIZAL FUNGI; N-ACETYL-BETA-GLUCOSAMINIDASE; RHIZOSPHERE; RNA; SOIL TYPES; BETA-N-ACETYLGLUCOSAMINIDASE; DNA TRANSCRIPTION; GLUTAMINE SYNTHETASE; RIBONUCLEIC ACID; TYROSINASE.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010e4344c33&uri=/notices/prodinra1/2010/11/
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Plant-driven selection of microbes Inra
Hartmann, A.; Schmid, M.; Van Tuinen, D.; Berg, G..
The rhizodeposition of plants dramatically influence the surrounding soil and its microflora. Root exudates have pronounced selective and promoting effects on specific microbial populations which are able to respond with chemotaxis and fast growth responses, such that only a rather small subset of the whole soil microbial diversity is finally colonizing roots successfully. The exudates carbon compounds provide readily available nutrient and energy sources for heterotrophic organisms but also contribute e.g. complexing agents, such as carboxylates, phenols or siderophores for the mobilization and acquisition of rather insoluble minerals. Root exudation can also quite dramatically alter the pH- and redox-milieu in the rhizosphere. In addition, not only...
Tipo: Journal Article Palavras-chave: EXSUDATION RACINAIRE; RHIZODEPOSITION; DIVERITE MICROBIENNE; MYCORHIZES A ARBUSCULES; ANTIMICROBIEN ROOT EXUDATION; RHIZODEPOSITION; MICROBIAL DIVERSITY; RHIZOSPHERE BACTERIA; MYCORRHIZAL FUNGI; ARBUSCULAR MYCORRHIZA; ECTOMYCORRHIZA; ANTIMICROBIALS; SIGNALLING COMPOUNDS; PLANT GROWTH PROMOTION; BIOLOGICAL CONTROL; "BIASED RHIZOSPHERE CONCEPT".
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011720427a9&uri=/notices/prodinra1/2011/05/
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Temporal changes in the ectomycorrhizal community in two soil horizons of a temperate oak forest Inra
Courty, P.E.; Franc, A.; Pierrat, J.C.; Garbaye, J..
The species structure of an ectomycorrhizal (ECM) community was assessed monthly for 15 months in the two horizons (A1 and A2) of an oak temperate forest in northeastern France. Ectomycorrhizal species were identified each month by internal transcribed spacer sequencing. Seventy-five fungal symbionts were identified. The community was dominated by Tomentellaceae, Russulaceae, Cortinariaceae, and Boletales. Four species are abundant in the study site: Lactarius quietus, Tomentella sublilacina, Cenococcum geophilum, and Russula sp1. The relative abundance of each species varied depending on the soil horizon and over time. Some species, such as L. quietus, were present in the A1 and A2 horizons. C. geophilum was located particularly in the A2 horizon,...
Tipo: Journal Article Palavras-chave: FORET FEUILLUE; HORIZON A1; HORIZON A2; CHAMPIGNON MYCORHIZIEN; ECTOMYCORHIZE; ABONDANCE SPECIFIQUE; VARIATION TEMPORELLE ECTOMYCORRHIZAS; TEMPERATE FORESTS; HORIZONS; MICROBIAL FLORA; MYCORRHIZAL FUNGI; MICROFLORA; SPATIAL DISTRIBUTION; TEMPORAL VARIATION.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010aa911704&uri=/notices/prodinra1/2010/11/
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The rhizosphere zoo: An overview of plant-associated communities of microorganisms, including phages, bacteria, archaea, and fungi, and of some of their structuring factors Inra
Buee, M.; De Boer, W.; Martin, F.; van Overbeek, L.; Jurkevitch, E.
Rhizosphere microorganisms have two faces, like Janus the Roman god of gates and doors who symbolizes changes and transitions, from one condition to another. One face looks at the plant root, the other sees the soil. The ears and the nose sense the other gods around and the mouths are wide open, swallowing as much as they can, and as described in Chapter 11, they also are busy talking. These faces may as well represent Hygieia (the Greek god of Health and Hygiene, the prevention of sickness and the continuation of good health) and Morta (the Roman god of death) for rhizosphere microbes can be beneficial, and promote plant growth and well being (Chapter 12) or detrimental, causing plant sickness and death (Chapter 13). It can be argued that many rhizosphere...
Tipo: Journal Article Palavras-chave: BURKHOLDERIA-CEPACIA COMPLEX; GRADIENT GEL-ELECTROPHORESIS; DISEASE-SUPPRESSIVE SOILS; FINE-SCALE DISTRIBUTION; FIELD-GROWN WHEAT; REAL-TIME PCR; ECTOMYCORRHIZAL FUNGI; MICROBIAL DIVERSITY; MYCORRHIZAL FUNGI; RIBOSOMAL-RNA.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20102ca75b44&uri=/notices/prodinra1/2010/10/
Registros recuperados: 5
Primeira ... 1 ... Última
 

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