Mulugeta Mekonnen
Ethiopia Institute of Agricultural Research Center (EIAR), National Agricultural Biotechnology Research Center,
Holetta
Ethiopia
Research Article
Evaluating the Symbiotic Effectiveness of Common Bean (Phaseolus vulgaris L.) Nodulating Rhizobial Mutants on Extreme pH and High Salt Soil Conditions
Author(s): Mulugeta MekonnenMulugeta Mekonnen
The intent of this study was to evaluate the symbiotic effectiveness of common bean (Phaseolus vulgaris L.)-nodulating mutant rhizobia isolates to extreme pH and high salt soil condition around Babile, eastern Ethiopia. After mutagenesis, from 50 identified wild rhizobia isolates, a total of 8 mutants were selected based on their ability to survive at extreme salt and pH conditions. The nodule number of mutants were positively and significantly correlated with nodule dry weight (r=0.85, p<0.0001) on sand culture. Six of the highly effective mutants were tested on unsterilized soil in controlled growth chamber. The correlation data on soil experiment displayed that nodule number was positively associated and significant (r=0.73, p<0.0001) with nodule dry weight (NDW) while shoot dry weight (SDW) was positively correlated with present N (r=0.8, p<0.0001) and total nitrogen cont.. View More»
DOI:
10.4172/2157-7471.1000462