Vegetos
(An International Journal of Plant Research & Biotechnology)
(eISSN: 2229-4473)
Plant growth promoting Rhizobium isolates from common bean (Phaseolus vulgaris) root nodules exhibited host range variability
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Research Articles | Published: 26 June, 2026
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Keywords: n Phaseolus vulgarisn , Plant growth and development, Phytohormone production, n Rhizobiumn , n 16S rRNAn
Abstract
Common bean (Phaseolus vulgaris) is a promiscuous host nodulated by multiple rhizobial taxa and symbiovars. Accordingly, this study evaluated the host-range specificity of common bean Rhizobium isolates. Inoculation tests demonstrated that Rhizobium isolate PVJ5 is host-specific, nodulating exclusively Phaseolus vulgaris, but isolates PVJ8 and PVJ9 exhibit a broad host range, nodulating Phaseolus vulgaris, Vigna umbellata, and Glycine max. Concurrently, all three rhizobia promote the plant growth regardless of the nodulation condition. The Rhizobium isolates have phosphate solubilisation and phytohormone (auxin and gibberellic acid) production abilities. The identified Rhizobium has the potential to serve as a specific and broad host-range inoculum for usage as a consortia bioinoculant for Phaseolus vulgaris and other legumes.
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Author Information
Department of Botany, Nagaland University, Lumami, India