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Creators/Authors contains: "Zribi, Ikram"

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  1. ; ; ; ; ; ; ; ; ; (, Science Advances)
    Host range specificity is a prominent feature of the legume-rhizobial symbiosis.Sinorhizobium melilotiandSinorhizobium medicaeare two closely related species that engage in root nodule symbiosis with legume plants of theMedicagogenus, but certainMedicagospecies exhibit selectivity in their interactions with the two rhizobial species. We have identified aMedicagoreceptor–like kinase, which can discriminate between the two bacterial species, acting as a genetic barrier against infection by mostS. medicaestrains. Activation of this receptor-mediated nodulation restriction requires a bacterial gene that encodes a glycine-rich octapeptide repeat protein with distinct variants capable of distinguishingS. medicaefromS. meliloti. This study sheds light on the coevolution of host plants and rhizobia, shaping symbiotic selectivity in their respective ecological niches. 
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