| rhizobium freirei sp. nov., a symbiont of phaseolus vulgaris that is very effective at fixing nitrogen. | common bean (phaseolus vulgaris l.) can establish symbiotic associations with several rhizobium species; however, the effectiveness of most strains at fixing nitrogen under field conditions is very low. prf 81(t) is a very effective strain, usually referred to as rhizobium tropici and used successfully in thousands of doses of commercial inoculants for the common bean crop in brazil; it has shown high rates of nitrogen fixation in all areas representative of the crop in the country. here, we pre ... | 2013 | 23771622 |
| characterization of rhizobia isolates obtained from nodules of wild genotypes of common bean. | this study aimed to evaluate the tolerance to salinity and temperature, the genetic diversity and the symbiotic efficiency of rhizobia isolates obtained from wild genotypes of common bean cultivated in soil samples from the states of goiás, minas gerais and paraná. the isolates were subjected to different nacl concentrations (0%, 1%, 2%, 4% and 6%) at different temperatures (28°c, 33°c, 38°c, 43°c and 48°c). genotypic characterization was performed based on box-pcr, rep-pcr markers and 16s rrna ... | 2016 | 27777012 |