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Laccaria bicolor S238N improves Scots pine mineral nutrition by increasing root nutrient uptake from soil minerals but does not increase mineral weathering Inra
Calvaruso, C.; Turpault, M.P.; Uroz, S.; Leclerc, E.; Kies, A.; Frey-Klett, P..
The role of ectomycorrhizal fungi on mineral nutrient mobilization and uptake is crucial for tree nutrition and growth in temperate forest ecosystems. By using a “mineral weathering budget” approach, this study aims to quantify the effect of the symbiosis with the ectomycorrhizal model strain Laccaria bicolor S238N on mineral weathering and tree nutrition, carrying out a column experiment with a quartz/biotite substrate. Each column was planted with one Scots pine (Pinus sylvestris L.) non-mycorrhizal or mycorrhizal with L. bicolor, with exception of the abiotic control treatment. The columns were continuously supplied with a nutrient-poor solution. A mineral weathering budget was calculated for K and Mg. The pine shoot growth was significantly increased...
Tipo: Journal Article Palavras-chave: ECTOMYCORRHIZA; LACCARIA BICOLOR S238N; SCOTS PINE; MINERAL WEATHERING; BIOTITE; NUTRIENT UPTAKE.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010b45b43e1&uri=/notices/prodinra1/2010/10/
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Lateral root stimulation in the early interaction between Arabidopsis thaliana and the ectomycorrhizal fungus Laccaria bicolor: Is fungal auxin the trigger? Inra
Felten, J; Legué, V.; Ditengou, F.A..
Lateral root (LR) stimulation during early signal exchange between plant roots and ectomycorrhizal (ECM) fungi has recently been shown to be achieved by modulation of auxin gradients. We suggested that this modulation could occur through altered polar auxin transport (PAT) and through activation of auxin signalling pathways in the root. However, it remains unclear, which fungal molecules alter auxin pathways inside the plant partner. It has been suggested in previous studies that auxin released by the fungus could trigger observed plant responses during early signal exchange and later on during root colonization. Here we focus on the early interaction and we provide evidence for an alternative mechanism. Indeed, LR stimulation by the fungus in A. thaliana...
Tipo: Journal Article Palavras-chave: MYCORRHIZA; ECTOMYCORRHIZA; LATERAL ROOT; AUXIN; VOLATILES; ETHYLENE; JASMONIC ACID.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010ef275ada&uri=/notices/prodinra1/2011/07/
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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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The roles of auxins and cytokinins in mycorrhizal symbioses Inra
Barker, S.J.; Tagu, D..
Most land plant species that have been examined exist naturally with a higher fungus living in and around their roots in a symbiotic partnership called a mycorrhiza. Several types of mycorrhizal symbiosis exist, defined by the host/partner combination and the morphology of the symbiotic structures. The arbuscular mycorrhiza (AM) is ancient and may have co-evolved with land plants. Emerging results from gene expression studies have suggested that subsets of AM genes were co-opted during the evolution of other biotrophic symbioses. Here we compare the roles of phytohormones in AM symbiosis and ectomycorrhizas (EC), a more recent symbiosis. To date, there is little evidence of physiologic overlap between the two symbioses with respect to phytohormone...
Tipo: Journal Article Palavras-chave: ECTOMYCORHIZE; MYCORHIZE A ARBUSCULE; SUBSTANCE DE CROISSANCE VEGETALE PHYTOHORMONES; ARBUSCULAR MYCORRHIZA; ECTOMYCORRHIZA; CYTOKININ; ENOD40; AUXIN; ROOT MORPHOLOGY.
Ano: 2000 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0100028828085588&uri=/notices/prodinra1/2010/12/
Registros recuperados: 4
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