Search results for "Mycorrhiza"

Genes encoding transcription factors in Glomus intraradices and their expression at the appressoria stage of arbuscular mycorrhiza interactions

2007

International audience; Molecular pathways governing the life cycle of arbuscular mycorrhizal (AM) fungi and their symbiotic interactions with root tissues are not yet fully understood. Most studies fo fungal responses to host plants have targeted developmental stages before root contact (germinating spores), or after root colonization (intraradical mycelium). We are focusing on the early cell events of appressoria contact with the root surface which are essential to the successful outcome of the AM symbiosis. Recent monitoring of Glomus intraradices gene expression at this stage has revealed differential fungal responses to roots of host and non-host (Myc- mutants) M. truncatula (Seddas et…

Contribution of proteomics to arbuscular mycorrhiza in Medicago truncatula

2007

International audience; Because proteins are key effectors of plant responses to environmental cues including recognition, signalling, transport and defence reactions, main interest has been paid to characterize those involved in the establishment and functioning of arbuscular mycorrhizal (AM) symbiosis. In our group, the setting up of high throughput proteomic techniques on the model species, Medicago truncatula, is providing step-by-step a large-scale analysis of AM symbiosis-related proteins. Depending on the symbiotic stage targeted and on the abundance of mycorrhizal material, different proteomic strategies that can be combined with other large-scale approaches (transcriptomic and meta…

Trophic relationships between the cultivated plant and arbuscular mycorrhizal fungi. Importance of arbuscular mycorrhizal fungi on plant production (…

2018

French : Dans son environnement, la plante interagit sans cesse avec des microorganismes. Elle est confrontée à une variété de microorganismes bénéfiques, neutres ou pathogènes, qui sont fortement dépendants des ressources carbonées que la plante libère dans le sol, leur conférant ainsi un apport de nutriments et d’énergie nécessaire à leur développement. La mycorhize à arbuscules est une symbiose mutualiste formée par 80% des plantes terrestres datant de l’Ordovicien, i.e. environ 450 millions d’années avant notre ère. L’ensemble des travaux de recherche présenté au sein de ce manuscrit, s’inscrit dans le cadre de deux objectifs généraux : (i) acquérir une meilleure compréhension des mécan…

Interactions between a mycorrhiza helper bacterium and arbuscular mycorrhizas

2009

Pseudomonas fluorescens C7R12 was shown to promote arbuscular mycorrhization and to act as a ‘Mycorrhiza Helper Bacteria’ (MHB). The complex interactions between this model strain, Arbuscular Mycorrhizal (AM) fungi and host-plants were analysed by assessing the specificity of these interactions and by characterizing bacterial cell organization on mycorrhizal roots. Evaluation of the interaction specificity relied on the comparison of the bacterial effect on (i) the in vitro saprophytic growth of Glomus mosseae and Gigasopora rosea and (ii) the root colonization of two different plant species (Medicago truncatula and Lycopersicon esculentum) by the two AM fungal species. Characterization of …

Divisio/Phylum Glomeromycota

2012

SPE IPM Chapitre 11

Identification de transporteurs de sucres marqueurs de la mycorhize à arbuscules

2012

Arbuscular mycorrhizal fungi, partners of the rhizostabilization proccess of an orphan mining site

2012

International audience

Mycorrhizal fungal population structure in the field

2009

Ribosomal sequences as a tool to study and monitor arbuscular mycorrhizal fungi

2002

International audience

Deciphering the molecular dialogue between arbuscular mycorrhizal partners during early root interactions

2009

International audience