FRUGIER , Florian

Background MicroRNAs (miRNAs) are endogenous single-stranded small RNAs that regulate the expression of specific mRNAs involved in diverse biological processes. In plants, miRNAs are generally encoded as a single species in independent transcriptional units, referred to as MIRNA genes, in contrast to animal miRNAs, which are frequently...

PRAF proteins are present in all plants, but their functions remain unclear. We investigated the role of one member of the PRAF family, MtZR1, on the development of roots and nitrogen-fixing nodules in Medicago truncatula. We found that MtZR1 was expressed in all M.truncatula organs. Spatiotemporal analysis showed that MtZR1 expression in...

In the legume-rhizobia symbiosis, atmospheric dinitrogen (N2) fixation by rhizobia takes place in a specific root organ, called the nodule. During biological N2 fixation, the plant provides photosynthetic carbohydrates to bacteria and, in exchange, bacteria feed the plant with reduced nitrogen (N) under ammonia (NH3) form. Like most other...

Soil salinity is one of the most significant abiotic stresses for crop plants, including legumes. These plants can establish root symbioses with nitrogen-fixing soil bacteria and are able to grow in nitrogen-poor soils. Medicago truncatula varieties show diverse adaptive responses to environmental conditions, such as saline soils. We have...

The topic of this paper is the physiological adaptation of legume-rhizobium symbiotic plants to fluctuating and heterogeneous environmental constraints. How inter-organ signaling may contribute to whole plant adaptation to a localized stress is the major biological question addressed by this study using molecular and physiological approaches....

Legume plants can acquire mineral nitrogen (N) either through their roots or via a symbiotic interaction with N-fixing rhizobia bacteria housed in root nodules. To identify shoot-to-root systemic signals acting in Medicago truncatula plants at N deficit or N satiety, plants were grown in a split-root experimental design in which either high or...

Senescence determines plant organ lifespan depending on aging and environmental cues. During the endosymbiotic interaction with rhizobia, legume plants develop a specific organ, the root nodule, which houses nitrogen (N)-fixing bacteria. Unlike earlier processes of the legume-rhizobium interaction (nodule formation, N fixation), mechanisms...

Senescence determines plant organ lifespan depending on aging and environmental cues. During the endosymbiotic interaction with rhizobia, legume plants develop a specific organ, the root nodule, which houses nitrogen (N)-fixing bacteria. Unlike earlier processes of the legume-rhizobium interaction (nodule formation, N fixation), mechanisms...

This Whole Genome Shotgun project has been deposited at DDBJ/ENA/GenBank under the accession PSQE00000000.