This NSF-funded project uses functional genomics to investigate the process of legume root hair infection by nitrogen-fixing rhizobia. This infection initiates the symbiosis between this bacterium and its host that will result in the de novo formation of a novel organ, the nodule. It is within the nodule that the bacterium fixes nitrogen providing its host plant an advantage in environments where this element is limiting. The establishment of the symbiosis involves a complex interplay between host and symbiont, which is orchestrated by the exchange of diffusible signal molecules.

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  • Distinct, crucial roles of flavonoids during legume nodulation 

    Subramanian, Senthil; Stacey, Gary, 1951-; Yu, Oliver (Elsevier, 2007-06)
    RNA interference-mediated silencing of the key flavonoid and isoflavone biosynthesis enzyme, respectively, by two different research groups has provided direct genetic evidence for the essential roles that these compounds ...
  • Genetics and functional genomics of legume nodulation 

    Stacey, Gary, 1951-; Libault, Marc; Brechenmacher, Laurent; Wan, Jinrong; May, Gregory D. (Elsevier, 2006-02)
    Gram-negative soil bacteria (rhizobia) within the Rhizobiaceae phylogenetic family (a-proteobacteria) have the unique ability to infect and establish a nitrogen-fixing symbiosis on the roots of leguminous plants. This ...
  • Proteomic Analysis of Soybean Root Hairs After Infection by Bradyrhizobium japonicum 

    Wan, Jinrong; Torres, Michael; Ganapathy, Ashwin; Thelen, Jay J.; DaGue, Beverly B.; Mooney, Brian P.; Xu, Dong, 1965-; Stacey, Gary, 1951- (APS Press, 2005-01)
    Infection of soybean root hairs by Bradyrhizobium japonicum is the first of several complex events leading to nodulation. In the current proteomic study, soybean root hairs after inoculation with B. japonicum were separated ...