Gene-for-gene interaction in the legume-Rhizobium symbiosis

摘要: The gene-for-gene hypothesis of plant-pathogen interaction as proposed by H.H. Flor states that for each resistance gene in the host there is a specific, complementary conditioning pathogenicity parasite. Numerous examples this type have been elucidated past 40 years. This model plant-microbe also provides simple framework which to view symbiotic interactions. We identified 10 instances literature between plants family Leguminosae and bacterial symbionts genera Rhizobium or Bradyrhizobium appear function fashion. In addition, we describe two further apparent soybean-B. japonicum symbiosis. These last were our laboratory result an intensive search soybean germplasm would restrict resist nodulation highly competitive, but relatively poor nitrogen fixing strains B. are indigenous production areas U.S.A. practical goal work firstly, development genotype with genetic factors conferring ‘resistance’ broad spectrum ineffective bradyrhizobia secondly, construction effective inoculant strain possessing genes necessary optimally nodulate such genotype. dual approach develop both partners legume-rhizobial symbiosis represents new application system.