RHIZOBIUM HOST-RANGE EXTENSION BY INTRODUCTION OF RHIZOBIUM-TRIFOLII NOD GENES

Although the symbiosis between legume and root nodule bacteria is generally considered to be highly specific, the degree of specificity varies widely among rhizobia (Gabriel and Rolfe 1990; Young and Johnston 1989). Some strains show a very narrow host-range, for example, Rhizobium leguminosarum biovar trifolii nodulates only Trifolium. In contrast, Rhizobium sp. NGR 234 nodulates 35 legume genera, in addition to the non-legume Parasponia (Lewin et al. 1987). © Taylor & Francis Group, LLC.