Abstract
The symbiotic efficiency of coastal sand dune rhizobial isolates on four cultivated legumes, cowpea (Vigna unguiculata), green gram (Vigna radiata), black gram (Vigna mungo) and horse gram (Macrotyloma uniflorum), was assessed. Among the isolates of Someshwara (S1–S5), inoculation of S5 resulted in the highest increase of shoot biomass in cowpea (control vs experimental, 1:6), while inoculation of P1 among the Padubidri isolates (P1–P5) induced the highest shoot biomass in cowpea (1:14.4). Inoculation of the isolate P2 induced higher shoot biomass against uninoculated controls of horse gram (12.6:1), green gram (11.2:1) and black gram (6.1:1). One-way ANOVA revealed significant difference in the shoot biomass between uninoculated and inoculated cowpea plants with ten rhizobial isolates (P <0.05). Cultivation of surface-sterilized green gram seeds on unsterilized dune sand resulted in profuse flowering as well as nodules within 6 weeks indicating possibilities for isolating efficient rhizobial strains through cultivating edible legumes on coastal sand dune soils.
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Authors are grateful to Mangalore University for permission to carry out this investigation. We thank Dr. NS Raviraja for statistical analysis and reviewers for constructive suggestions.
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Arun, A.B., Sridhar, K.R. Symbiotic performance of fast-growing rhizobia isolated from the coastal sand dune legumes of west coast of India. Biol Fertil Soils 40, 435–439 (2004). https://doi.org/10.1007/s00374-004-0800-0
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DOI: https://doi.org/10.1007/s00374-004-0800-0