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<p>This study investigated a liquid formulation containing the plant growth-promoting rhizobacterium (PGPR) <i>Kosakonia oryzae</i> AG15 associated with <i>Agave</i> spp., collected in the State of Paraíba, Brazil, and containing sodium alginate, glycerol, and gum arabic as stabilizers. The morphological, biochemical, and functional characterization of the strain confirmed its potential for indole-3-acetic acid production and nitrogen fixation, with growth conditions at 30&#xa0;°C, pH 7.5, and 24&#xa0;h of incubation in Luria–Bertani medium supplemented with sucrose, reaching a biomass of 3.25&#xa0;g L⁻<sup>1</sup>. The optimized bioinoculant formulation, composed of 0% sodium alginate, 0.5% glycerol, and 0.5% gum arabic, maintained a viable cell population of 10<sup>5</sup>&#xa0;CFU/mL during 180&#xa0;days of storage at 7&#xa0;°C. As an agronomic application in <i>Phaseolus vulgaris</i> L., the liquid inoculant demonstrated its effectiveness, with increases in root iron content (26.47%), root dry weight (15.15%), shoot dry weight (8.82%), root length (7.4%), and shoot length (26.21%). Taken together, these results suggest that the optimized liquid formulation of <i>K. oryzae</i> AG15, stabilized with gum arabic and glycerol, is a promising bioinoculant for improving the development of <i>P. vulgaris</i> L., and applications in other plants can be explored to support sustainable agricultural practices.</p>

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Insights into using Kosakonia oryzae AG15 in liquid formulations containing sodium alginate, glycerol, and gum arabic for the sustainable development of Phaseolus vulgaris L

  • 期刊论文

  • 发表日期：

    2025年10月4日

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  • Adrielle Aparecida Paulista Ribeiro,
  • Tais Magalhães Abrantes Pinheiro,
  • Iara Rossi,
  • Fernanda Mendes Gomes,
  • Amanda Carmelo da Rocha,
  • Igor Romeiro dos Santos,
  • Fabrício Gomes Menezes Porto,
  • Mayara Teixeira da Silva,
  • Angélica Abadia Paulista Ribeiro,
  • Vicelma Luiz Cardoso,
  • Miriam Maria de Resende

摘要

This study investigated a liquid formulation containing the plant growth-promoting rhizobacterium (PGPR) Kosakonia oryzae AG15 associated with Agave spp., collected in the State of Paraíba, Brazil, and containing sodium alginate, glycerol, and gum arabic as stabilizers. The morphological, biochemical, and functional characterization of the strain confirmed its potential for indole-3-acetic acid production and nitrogen fixation, with growth conditions at 30 °C, pH 7.5, and 24 h of incubation in Luria–Bertani medium supplemented with sucrose, reaching a biomass of 3.25 g L⁻1. The optimized bioinoculant formulation, composed of 0% sodium alginate, 0.5% glycerol, and 0.5% gum arabic, maintained a viable cell population of 105 CFU/mL during 180 days of storage at 7 °C. As an agronomic application in Phaseolus vulgaris L., the liquid inoculant demonstrated its effectiveness, with increases in root iron content (26.47%), root dry weight (15.15%), shoot dry weight (8.82%), root length (7.4%), and shoot length (26.21%). Taken together, these results suggest that the optimized liquid formulation of K. oryzae AG15, stabilized with gum arabic and glycerol, is a promising bioinoculant for improving the development of P. vulgaris L., and applications in other plants can be explored to support sustainable agricultural practices.