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Graham, P.H., Draeger, K.J., Ferrey, M.L., Conroy, M.J., Hammer, B.E., Martinez, E., Aarons, S.R. and Quinto, C. (1994) Acid pH Tolerance in Strains of Rhizobium and Bradyrhizobium, and Initial Studies on the Basis for Acid Tolerance of Rhizobium tropici UMR1899. Canadian Journal of Microbiology, 40, 198-207. http://dx.doi.org/10.1139/m94-033

has been cited by the following article:

• TITLE: Isolation and Characterization of Nitrogen Fixing Rhizobia from Cultivated and Uncultivated Soils of Northern Tanzania

  AUTHORS: Zephania Simon, Kelvin Mtei, Amare Gessesse, Patrick A. Ndakidemi

  KEYWORDS: Isolation, Rhizobia, Nitrogen Fixation, Symbiosis, Nodules, Legume, Most Probable Number

  JOURNAL NAME: American Journal of Plant Sciences, Vol.5 No.26, January 2, 2015

  ABSTRACT: Soil bacteria1 called rhizobia are gram-negative capable to colonize the soil immediately surrounding roots under the influence of the plant “rhizosphere” and reduce atmospheric nitrogen into the form available to plants through nitrogen fixation process. Nitrogen is the most limiting and supplied nutrient to most plants, and the determinant of plant growth. Legumes differ with most plants because they have access to nitrogen from both mineral and symbiotic sources. Small-scale farmers who are the major legume producers in Africa rarely apply fertilizers during legume production. Hence, the crop is largely dependent on fixed nitrogen from native nitrogen fixers. Isolation of rhizobia for legume production has been given a little attention in Africa due to inadequate research or negligence of researchers and unawareness of its potential in legume production as well as lack of an intention from skilled personnel to popularize the technology. Evaluation of effectiveness of isolated rhizobia is essential for inoculants preparation, host specificity recommendation and symbiotic effectiveness. The isolation, determination of their population in the soil and assessing factors affecting their population and testing the effectiveness of native nitrogen fixers with respect to right trap host crop are given a special attention in this review.