Abstract Background Microbial-mediated plant growth promotion has gained significant attention in agriculture due to its potential to improve crop yield and sustainability. Indole-3-acetic acid (IAA) and tryptophan are key compounds synthesized by certain bacteria, known to positively influence plant development. High-performance liquid chromatography (HPLC) is a robust analytical technique capable of accurately quantifying these compounds, enabling a deeper understanding of plant-microbe interactions. Results In this study, bacterial isolates designated as MUSRH-5 were investigated for their plant growth-promoting activities. Cultured bacterial strains were assessed for their efficacy in promoting plant growth. Through HPLC analysis, varying concentrations of IAA and tryptophan were observed among the bacterial isolates, indicating differing metabolic capabilities. Significant variations in plant growth-promoting activities were also noted, with certain strains demonstrating notable effectiveness. Conclusion The findings of this study highlight the potential of selected bacterial isolates, particularly MUSRH-5 strains, to enhance plant growth through the production of growth-promoting compounds. The utilization of HPLC for precise quantification provided valuable insights into the metabolic capabilities of these bacteria and their impact on plant development. This research underscores the importance of microbial-mediated plant growth promotion in sustainable agriculture and environmental management, emphasizing the role of bacterial isolates as valuable assets in enhancing agricultural productivity and mitigating environmental challenges.
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Swarnakar et al. (2024) studied this question.
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