Abstract: The invention relates to lipochitooligosaccharides obtainable from arbuscular mycorrhizal fungi, and which are useful for stimulating arbuscular mycorrhizal symbiosis, and lateral root formation.

Abstract: The invention relates to lipochitooligosaccharides obtainable from arbuscular mycorrhizal fungi, and which are useful for stimulating arbuscular mycorrhizal symbiosis, and lateral root formation.

Abstract: The invention relates to lipochitooligosaccharides obtainable from arbuscular mycorrhizal fungi, and which are useful for stimulating arbuscular mycorrhizal symbiosis, and lateral root formation.

Abstract: The present invention relates to synthetic compounds that are active on plants, especially as legume nodulation factors, and also as plant growth stimulators, and to methods for preparing such compounds, which are of formula (I).

Abstract: The invention relates to lipochitooligosaccharides obtainable from arbuscular mycorrhizal fungi, and which are useful for stimulating arbuscular mycorrhizal symbiosis, and lateral root formation.

Abstract: The present invention relates to synthetic compounds that are active on plants, especially as legume nodulation factors, and also as plant growth stimulators, and to methods for preparing such compounds, which are of formula (I).

Abstract: The present invention relates to synthetic compounds that are active on plants, especially as legume nodulation factors, and also as plant growth stimulators, and to methods for preparing such compounds, which are of formula (I).

Abstract: The present invention relates to synthetic compounds that are active on plants, especially as legume nodulation factors, and also as plant growth stimulators, and to methods for preparing such compounds, which are of formula (I): “Veuillez inserer la formule chimique de la version papier” (I)

Abstract: The present invention relates to synthetic compounds that are active on plants, especially as legume nodulation factors, and also as plant growth stimulators, and to methods for preparing such compounds, which are of formula (I):

Abstract: The invention relates to isolated DMI11 genes from Medicago truncatula which play a major role both in the early steps of Nod factor signaling that trigger several key developmental responses in the host plant and in the establishment of mycorrhizal symbiosis. The invention also relates to transgenic plants and plant cells expressing the DMI1 protein for increased root nodulation, and methods for transforming plants with a M. truncatula DMI1 gene.

Abstract: The present invention relates to synthetic compounds that are active on plants, especially as legume nodulation factors, and also as plant growth stimulators, and to methods for preparing such compounds, which are of formula (I):

Abstract: Mycorrhizal and rhizobial associations represent the two most important symbiotic relationships between higher plants and microorganisms, providing access to otherwise limiting supplies of phosphate and nitrogen, respectively. Although many higher plants are able to establish a symbiotic relationship with arbuscular mycorrhizal fungi, legumes are unusual among plants because they also form associations with nitrogen fixing soil bacteria called rhizobia. This symbiosis requires the production of bacterial signals, “Nod factors” that trigger several key developmental responses in the host plant (Dénarié et al., 1996). The DMI1 gene of the model legume M. truncatula plays a major role both in the early steps of Nod factor signaling and in the establishment of mycorrhizal symbiosis. Dmi1 mutants do not exhibit many of the early responses to Nod factors and are incapable of forming nitrogen fixing root nodules. Here we describe the cloning and preliminary characterization of DMI1.

Abstract: An essentially pure substance has a structure of a Nod factor or one of its analogues. The Nod factor is characterized by the fact that its biosynthesis is controlled by at least one nodulation gene (nodA,B,C) common to the Rhizobiaceae, in particular to the genera Rhizobium, Bradyrhizobium, Sinorhizobium and Azorhizobium. This substance consists of a lipo-oligosaccharide which is not a derivative of the exopolysaccharides and which has the general formula (I). In formula (I), the Nod factor of which it has the structure is a plant-specific symbiotic signal and is capable of enhancing the capacity of the bacteria of infect the host plant with which it is associated and/or of accelerating the formation of nodules on the host plant with which it is associated and/or of inducing the transcription of symbiotic genes of the leguminoseae. Applications to the treatment of plants and as an active therapeutic agent in humans and animals.