SYSKA , Camille

During the nitrogen-fixing symbiosis between the model legume Medicago truncatula and the rhizobiaceae Sinorhizobium meliloti, bacteria, differentiated into bacteroids within the nodule, reduce atmospheric nitrogen (N2) into ammonia (NH3), directly available by the plant. In exchange, the plant provides to its symbiont an ecological niche and...

The interaction between legumes and bacteria of rhizobia type results in a beneficial symbiotic relationship characterized by the formation of new root organs, called nodules. Within these nodules the bacteria, released in plant cells, differentiate into bacteroids and fix atmospheric nitrogen through the nitrogenase activity. This mutualistic...

The soil bacterium Sinorhizobium meliloti can establish a nitrogen-fixing symbiosis with the model legume Medicago truncatula. The rhizobia induce the formation of a specialized root organ called nodule, where they differentiate into bacteroids and reduce atmospheric nitrogen into ammonia. Little is known on the mechanisms involved in nodule...

Background: Interactions between pathogenic oomycetes and microbiota residing on the surface of the host plant root are unknown, despite being critical to inoculum constitution. The nature of these interactions was explored for the polyphagous and telluric species Phytophthora parasitica. Results: Composition of the rhizospheric microbiota of...