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<p>Soil salinization and fungal diseases severely constrain cotton production in Xinjiang, necessitating the development of sustainable and regionally adapted biocontrol strategies. This study aimed to evaluate the plant growth-promoting and biocontrol potential of <i>Bacillus amyloliquefaciens</i> XSZ-1, a bacterial strain isolated from continuous cotton field soil in Xinjiang. The strain XSZ-1 demonstrated pronounced tolerance to saline-alkaline stress, sustaining growth at NaCl concentrations up to 60.00&#xa0;g/L and pH values ranging from 7.0 to 9.0. XSZ-1 exhibited multiple plant growth-promoting traits, including solubilization of both organic and inorganic phosphorus and IAA production (12.38&#xa0;µg/mL). Antagonistic assays revealed broad-spectrum antimicrobial activity against all tested phytopathogens. Inoculation with XSZ-1 significantly enhanced cotton plant height (12.67%), root length (11.44%), and dry matter accumulation (up to 122.05% increase in root dry weight) compared to the uninoculated control. <i>Bacillus amyloliquefaciens</i> XSZ-1 is a promising multi-functional bacterium with both plant growth-promoting and biocontrol capabilities, well-suited for integration into cotton production systems in saline-alkaline regions. These findings provide a foundation for further field validation and mechanistic studies to support sustainable agriculture in Xinjiang.</p>

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Potential of Bacillus amyloliquefaciens XSZ-1 as a bio-inoculant for enhancing cotton productivity and health in saline-alkali cotton field soil

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Jiayue Yuan,
  • Jiali Lu,
  • Zekun Ma,
  • Yanlei Zhu,
  • Xu Geng,
  • Bei Zheng,
  • Rui Zhang

摘要

Soil salinization and fungal diseases severely constrain cotton production in Xinjiang, necessitating the development of sustainable and regionally adapted biocontrol strategies. This study aimed to evaluate the plant growth-promoting and biocontrol potential of Bacillus amyloliquefaciens XSZ-1, a bacterial strain isolated from continuous cotton field soil in Xinjiang. The strain XSZ-1 demonstrated pronounced tolerance to saline-alkaline stress, sustaining growth at NaCl concentrations up to 60.00 g/L and pH values ranging from 7.0 to 9.0. XSZ-1 exhibited multiple plant growth-promoting traits, including solubilization of both organic and inorganic phosphorus and IAA production (12.38 µg/mL). Antagonistic assays revealed broad-spectrum antimicrobial activity against all tested phytopathogens. Inoculation with XSZ-1 significantly enhanced cotton plant height (12.67%), root length (11.44%), and dry matter accumulation (up to 122.05% increase in root dry weight) compared to the uninoculated control. Bacillus amyloliquefaciens XSZ-1 is a promising multi-functional bacterium with both plant growth-promoting and biocontrol capabilities, well-suited for integration into cotton production systems in saline-alkaline regions. These findings provide a foundation for further field validation and mechanistic studies to support sustainable agriculture in Xinjiang.