Search results for " myc"
showing 10 items of 786 documents
High-troughput TILLING to identify symbiosis-related plant gene function in arbuscular mycorrhiza
2006
International audience
Medicago truncatula gene responses specific to arbuscular mycorrhiza interactions
2006
International audience
Influence du système de sécrétion de type III bactérien dans les intéractions plantes-Pseudomonas spp. fluorescents non pathogènes
2012
http://prodinra.inra.fr/record/271693SPEEAEcolDurCT3; L’objectif de cette thèse a été de contribuer à faire progresser les connaissances sur les interactions bénéfiques entre les plantes et les microorganismes en évaluant la contribution des systèmes de sécrétion de type III (SST3). Une synthèse des connaissances disponibles relatives aux SST3 chez les Pseudomonas non pathogènes, saprotrophes ou mutualistes, montre que les SST3 ne sont pas cantonnés aux interactions parasites ou pathogènes avec les plantes. Dans la première étude expérimentale, nous avons utilisé différents génotypes de Medicago truncatula Gaertn. cv. Jemalong capables (Myc+) ou non (Myc-) d’établir une symbiose mycorhizien…
Acaulospora sieverdingii, an ecologically diverse new fungus in the Glomeromycota, described from lowland temperate Europe and tropical West Africa
2011
International audience; From a survey of arbuscular mycorrhizal (AM) fungi in agro-ecosystems in Central Europe and West Africa, an undescribed species of Acaulospora was recovered and is presented here under the epithet Acaulospora sieverdingii. Spores of A. sieverdingii are 60-80 mu m in diam, hyaline to subhyaline to rarely light yellow and have multiple pitted depressions on the outer spore wall similar to those known for A. alpina, A. cavernata, A. paulinae and A. scrobiculata. The pits in A. sieverdingii are tiny and often irregular and resemble small dots (0.8-1.8 mu m) or lines (0.5-1.2 x 1.8-2.5 mu m). Analyses of the ITS1, 5.8S subunit and ITS2 regions of the rDNA resolved each of…
Studies of root colonization by a microcosm community of arbuscular mycorrhizal fungi unsing nested PCR
1998
International audience
Identification of functional markers of mycorrhiza efficiency in vineyard
2021
Arbuscular mycorrhizal fungi form a mutualistic symbiotic association with more than 80% ofland plants, including vines. Advantages of this mutualistic symbiosis are countless. Rootcolonisation by mycorrhizal fungi is mainly evaluated through staining and microscopicobservation. However those technics do not allow to differentiate different mycorrhizal fungi.In order to overcome those limits other tools, like antibodies, isoenzymes and molecular biologytechnics, can be used. Nevertheless, all of these methods “only” allow detection of the presenceof mycorrhizal fungi, whereas no information is provided on the proper mycorrhizal symbiosisfunctioning, and therefore on the benefits provided to…
Services provided by soil microorganisms to improve plant phosphate nutrition
2022
Since the first Green Revolution, agricultural practices have been based on the massive use of synthetic fertilisers and plant protection products. Since then, global consumption of phosphate fertilisers has more than tripled, reaching 47 million tonnes in 2019. Current projections estimate that phosphate rock stocks (natural phosphorus resources for fertiliser production) could be depleted within the next century, leading us to change our agricultural practices. In soils, P is mainly present in complexed forms that are not easily accessible to plants. To reduce the use of phosphate fertilisers, it is necessary to make this complexed phosphate accessible to plants. This can be done by benef…
Impact of phosphate fertilization and arboreal mycorrhization on the development of micropropagated walnut rootstocks
2021
This phD is part of the CASDAR MycoAgra project. The aim of the PhD is to understand mycorrhiza mechanisms in an agroforestry integrated culture system between walnut tree and corn culture; and to found out mycorrhiza impact on the global production. To identify which cultivation practices permit the best mycorrhiza fungi development, our study is organized in two axes of work: - We first want to know the impact of interculture on the common mycorrhizal network. - And the impact of nitrogen content in the soil on the common mycorrhizal network To the end, we expect to purpose to farmers crop itineraries that used as less as we can synthetic fertilizers, through alternative system.
Méthode de coloration pour l'observation et le comptage des endomycorhises à vésicules et arbuscules sur racines de maïs
2004
Cette méthode permet d'observer et de quantifier les Mycorhizes à Vésicules sur des racines de maïs sous loupe binoculaire (X 60)