Abstract
This paper examines the importance of salt tolerance of host cultivars, Bradyrhizobium strains, and host-Bradyrhizobium combinations on the symbiotic nitrogen fixation potential of soybean under NaCl and KCl salt stress. Plants were grown in a soil medium, and the experiments were conducted under controlled environment growth room conditions. Bradyrhizobium growth was examined in yeast-mannitol broth andB. japonicum strains tolerant of NaCl and KCl (80 mM) stress were identified. Soybean cultivar Williams, which was sensitive to salt stress, performed poorly both in growth and symbiotic nitrogen fixation, irrespective of whether it was matched with a tolerant or sensitive Bradyrhizobium strain. Tolerant cultivar Manchu sustained nodulation and nitrogen fixation, irrespective of whether it was matched with a tolerant or sensitive Bradyrhizobium strain. Evidence presented here suggests a need, first to select soybean cultivars that are tolerant to salt stress, and then to match them with tolerant and effective Bradyrhizobium strains.
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Velagaleti, R.R., Marsh, S. Influence of host cultivars and Bradyrhizobium strains on the growth and symbiotic performance of soybean under salt stress. Plant Soil 119, 133–138 (1989). https://doi.org/10.1007/BF02370277
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DOI: https://doi.org/10.1007/BF02370277