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<p>The environmental and economic limits of synthetic plant growth regulators urge the development of more sustainable alternatives. This study investigated coelomic fluid (CF) from Eudrilus eugeniae as a natural biostimulant for Oryza punctata (wild rice) growth. Plantlets grown on MS medium with CF (0.2%, 0.5%, and 0.7% v/v) were compared to hormone-free and synthetic PGR-treated controls (BAP, IBA, NAA). The 0.7% CF treatment resulted in the tallest shoots (11.8 ± 0.5&#xa0;cm) and roots (4.2 ± 0.3&#xa0;cm), a 2.4–3.1 fold increase over vitamin-deficient controls and outperforming synthetic hormones. Biochemical investigation showed that CF-treated plants had considerably higher chlorophyll content (42.8 ± 1.2&#xa0;mg g⁻¹ FW) and total soluble protein (20.8 ± 0.4&#xa0;mg mL⁻¹) than controls. SDS-PAGE confirmed metabolic activation through enhanced protein expression. CF-treated plants also demonstrated improved salinity tolerance. GC-MS and phytochemical analyses identified diverse bioactive metabolites in CF associated with growth promotion and stress mitigation. These findings establish earthworm coelomic fluid as a sustainable, biologically active alternative to synthetic PGRs, contributing to SDG 2, 6, 12, 13, and 15 through improved crop resilience and environmentally safe agricultural practices.</p>

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Coelomic fluid from Eudrilus eugeniae -mediated growth promotion and salinity stress tolerance in in vitro cultured Oryza punctata

  • 期刊论文

  • 发表日期：

    2026年4月20日

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  • Crosswin Saravanan,
  • Mohamed Jaabir,
  • Sanmathy Karthies,
  • Snagha Singaravelu,
  • Purusothaman Chandrasekar,
  • Anka Trajkovska Petkoska,
  • Peerzada Gh Jeelani

摘要

The environmental and economic limits of synthetic plant growth regulators urge the development of more sustainable alternatives. This study investigated coelomic fluid (CF) from Eudrilus eugeniae as a natural biostimulant for Oryza punctata (wild rice) growth. Plantlets grown on MS medium with CF (0.2%, 0.5%, and 0.7% v/v) were compared to hormone-free and synthetic PGR-treated controls (BAP, IBA, NAA). The 0.7% CF treatment resulted in the tallest shoots (11.8 ± 0.5 cm) and roots (4.2 ± 0.3 cm), a 2.4–3.1 fold increase over vitamin-deficient controls and outperforming synthetic hormones. Biochemical investigation showed that CF-treated plants had considerably higher chlorophyll content (42.8 ± 1.2 mg g⁻¹ FW) and total soluble protein (20.8 ± 0.4 mg mL⁻¹) than controls. SDS-PAGE confirmed metabolic activation through enhanced protein expression. CF-treated plants also demonstrated improved salinity tolerance. GC-MS and phytochemical analyses identified diverse bioactive metabolites in CF associated with growth promotion and stress mitigation. These findings establish earthworm coelomic fluid as a sustainable, biologically active alternative to synthetic PGRs, contributing to SDG 2, 6, 12, 13, and 15 through improved crop resilience and environmentally safe agricultural practices.