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<p>Chemical fertilizers play a crucial role in food production by ensuring a consistent growth rate to meet the nutritional demands of a growing population. However, they also carry ecological risks, prompting researchers to explore safer alternatives known as biofertilizers. Recent studies have shown that bacteria isolated from various natural sources can be a risk-free substitute with beneficial characteristics for enhancing plant growth. This research evaluated the influence of a <i>Bacillus velezensis</i> bacterial strain SNR14-4 isolated from <i>Oreochromis niloticus</i> (Nile tilapia) gills on plant growth promotion (PGP). The bioinformatics-guided in vitro bioassays were conducted to assess and solidify the strain's capability in producing the plant growth hormone Indole acetic acid, phosphate solubilization and ammonia production. Furthermore, the presence of siderophores and their type produced by the strain were investigated. With efficient genome-guided and targeted in vitro assays, the plant growth enhancement ability of the strain was evaluated on <i>Oryza sativa</i> (rice), and significant results were observed. The strain's capacity to stimulate plant growth in the selected rice variety was statistically analyzed in vivo using the Ragdoll method. Pot experiments were carried out to evaluate the strain's effectiveness in enhancing plant growth by attaching to its roots and alleviating salt stress in the soil directly through the formulation of a biofertilizer. The present experiment has proved the candidacy of <i>B. velezensis</i> SNR14-4 as a potential PGP and biocontrol agent was efficiently evaluated by genomic insights and further application of the strain in agriculture could be explored.</p>

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Enhancing Oryza sativa Growth with a Genome-Characterized Bacillus velezensis SNR14-4, a Marine Strain Isolated from Fish Gills

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Nambillipadath R. Rashid Muhammed,
  • Sethu Madhavan,
  • Niveditha D. Neroth,
  • Deepa John,
  • Sini Hariharan,
  • Kottayath G. Nevin

摘要

Chemical fertilizers play a crucial role in food production by ensuring a consistent growth rate to meet the nutritional demands of a growing population. However, they also carry ecological risks, prompting researchers to explore safer alternatives known as biofertilizers. Recent studies have shown that bacteria isolated from various natural sources can be a risk-free substitute with beneficial characteristics for enhancing plant growth. This research evaluated the influence of a Bacillus velezensis bacterial strain SNR14-4 isolated from Oreochromis niloticus (Nile tilapia) gills on plant growth promotion (PGP). The bioinformatics-guided in vitro bioassays were conducted to assess and solidify the strain's capability in producing the plant growth hormone Indole acetic acid, phosphate solubilization and ammonia production. Furthermore, the presence of siderophores and their type produced by the strain were investigated. With efficient genome-guided and targeted in vitro assays, the plant growth enhancement ability of the strain was evaluated on Oryza sativa (rice), and significant results were observed. The strain's capacity to stimulate plant growth in the selected rice variety was statistically analyzed in vivo using the Ragdoll method. Pot experiments were carried out to evaluate the strain's effectiveness in enhancing plant growth by attaching to its roots and alleviating salt stress in the soil directly through the formulation of a biofertilizer. The present experiment has proved the candidacy of B. velezensis SNR14-4 as a potential PGP and biocontrol agent was efficiently evaluated by genomic insights and further application of the strain in agriculture could be explored.