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<p>Cotton is a vital cash crop in India that is predominantly cultivated in rainfed regions and is increasingly affected by climate change, which leads to poor seed germination and seedling establishment. To address these challenges and support sustainable agriculture, the current investigation aimed to develop and optimize bioencapsulated cotton seeds using plant growth-promoting bacteria (PGPB) to enhance seed germination, bacterial viability, seed shelf life, and crop yield. The bioencapsulation process was optimized using Response Surface Methodology via inverse gelation with sodium alginate, polyvinyl alcohol, starch, and glycerol. A Box-Behnken design was employed to evaluate germination percentage, seedling growth, bacterial survival, and seed vigour index. The optimal composition for bioencapsulation was 1.5% sodium alginate, 7.5% PVA, 5% starch, and 10% glycerol. Bioencapsulated seeds maintained &gt; 80% seed germination and ~ 2.9 log₁₀ CFU/seed bacterial viability after 12&#xa0;months. Field studies conducted at two different locations in Punjab, India, showed that seeds bioencapsulated with <i>B. thaonhiensis</i> PAU_43RN and <i>P. brassicacearum</i> PAU_34RN improved seed cotton yield by 10.6% and 12.3%, and lint yield by 21.9% and 23.2%, respectively. This approach offers a promising solution for sustainable agriculture, reducing dependence on chemical fertilizers and enhancing resilience to climatic stresses.</p>

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A novel bioencapsulation strategy for delivering plant growth promoting bacteria via cotton seeds to improve crop yield and shelf stability

  • 期刊论文

  • 发表日期：

    2026年5月3日

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  • K. V. S. Jahnavi,
  • Gulab Pandove,
  • Sukhdeep Kaur Brar,
  • Amandeep Singh Sidhu,
  • Vidhi Arora,
  • Sohan Singh Walia

摘要

Cotton is a vital cash crop in India that is predominantly cultivated in rainfed regions and is increasingly affected by climate change, which leads to poor seed germination and seedling establishment. To address these challenges and support sustainable agriculture, the current investigation aimed to develop and optimize bioencapsulated cotton seeds using plant growth-promoting bacteria (PGPB) to enhance seed germination, bacterial viability, seed shelf life, and crop yield. The bioencapsulation process was optimized using Response Surface Methodology via inverse gelation with sodium alginate, polyvinyl alcohol, starch, and glycerol. A Box-Behnken design was employed to evaluate germination percentage, seedling growth, bacterial survival, and seed vigour index. The optimal composition for bioencapsulation was 1.5% sodium alginate, 7.5% PVA, 5% starch, and 10% glycerol. Bioencapsulated seeds maintained > 80% seed germination and ~ 2.9 log₁₀ CFU/seed bacterial viability after 12 months. Field studies conducted at two different locations in Punjab, India, showed that seeds bioencapsulated with B. thaonhiensis PAU_43RN and P. brassicacearum PAU_34RN improved seed cotton yield by 10.6% and 12.3%, and lint yield by 21.9% and 23.2%, respectively. This approach offers a promising solution for sustainable agriculture, reducing dependence on chemical fertilizers and enhancing resilience to climatic stresses.