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<p>Microbial exopolysaccharides (EPS) are key for soil aggregation, retention of moisture, nutrients, and EPS promote growth in plants. EPS is produced by <i>Bacillus subtilis</i> (BS2), which we isolated from the chili rhizosphere soil and also conducted a 16S rRNA sequence, which showed 100% of the similarity (1485/1485&#xa0;bp). We evaluated the growth-promoting effects of EPS on the following vegetables: papaya, cucumber, muskmelon, watermelon, pumpkin, and okra. From the evaluated treatments, EPS combined with enzyme (T4) showed the highest growth promotion. In the control (T1), watermelon root length improved from 4.2 to 6.9&#xa0;cm (64.3%), okra from 3.9 to 5.9&#xa0;cm (51.3%), and muskmelon from 3.5 to 6.2&#xa0;cm (77.1%). Also in the control (T1), watermelon shoot length improved from 12 to 18&#xa0;cm (50%), and muskmelon from 10.4 to 17.6&#xa0;cm (69.2%). Finally, watermelon and cucumber had improved chlorophyll content of 1.6–2.9&#xa0;mg&#xa0;g<sup>−1</sup> (81.3%) and in cucumber, it improved to 4.0&#xa0;mg&#xa0;g<sup>−1</sup> under the T4 treatment. EPS treatments improved leaf production, branching, and height with a maximum height of 60.5–64&#xa0;cm measured under EPS-based treatments. This shows that EPS derived from <i>B. subtilis</i> are great biostimulants and enhance the growth and vegetative state of plants.</p>

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Enhancing Fruit and Vegetable Crops Growth with Exopolysaccharide Produced by Bacillus subtilis

  • 期刊论文

  • 发表日期：

    2026年7月13日

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  • Indira Mikkili,
  • Syam Babu Davuluri,
  • Vallayya Chari Kommoju,
  • Sudarsini Borugadda,
  • Nikhila Damineni,
  • Pratyusha Gowra,
  • Akanksha Kotha,
  • Vaishnavi Ponnaganti

摘要

Microbial exopolysaccharides (EPS) are key for soil aggregation, retention of moisture, nutrients, and EPS promote growth in plants. EPS is produced by Bacillus subtilis (BS2), which we isolated from the chili rhizosphere soil and also conducted a 16S rRNA sequence, which showed 100% of the similarity (1485/1485 bp). We evaluated the growth-promoting effects of EPS on the following vegetables: papaya, cucumber, muskmelon, watermelon, pumpkin, and okra. From the evaluated treatments, EPS combined with enzyme (T4) showed the highest growth promotion. In the control (T1), watermelon root length improved from 4.2 to 6.9 cm (64.3%), okra from 3.9 to 5.9 cm (51.3%), and muskmelon from 3.5 to 6.2 cm (77.1%). Also in the control (T1), watermelon shoot length improved from 12 to 18 cm (50%), and muskmelon from 10.4 to 17.6 cm (69.2%). Finally, watermelon and cucumber had improved chlorophyll content of 1.6–2.9 mg g−1 (81.3%) and in cucumber, it improved to 4.0 mg g−1 under the T4 treatment. EPS treatments improved leaf production, branching, and height with a maximum height of 60.5–64 cm measured under EPS-based treatments. This shows that EPS derived from B. subtilis are great biostimulants and enhance the growth and vegetative state of plants.