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Main conclusion <p>The review highlights PGPR (e.g., <i>Pseudomonas</i> spp.) as sustainable, low-cost solution to mitigate drought and <i>Fusarium</i> stress in maize, enhancing yield and resilience.</p> Abstract <p>Maize (<i>Zea mays</i> L.) is a vital staple crop worldwide, yet its productivity is under growing pressure from the combined effects of drought and <i>Fusarium verticillioides</i> infection. These stresses often occur together, compounding the damage. Drought limits water availability, disrupts nutrient uptake, and slows photosynthesis, while also making plants more vulnerable to disease. In turn, <i>F. verticillioides</i> harms plant tissues, contaminates grain with <i>fumonisins</i>, and can further intensify water stress. Conventional approaches such as irrigation, fungicides, and resistant cultivars often fall short when both stresses occur simultaneously. In recent years, plant growth-promoting rhizobacteria (PGPR), particularly <i>Pseudomonas</i> spp., have gained attention as eco-friendly partners in managing these challenges. These beneficial bacteria support maize growth by improving nutrient availability, regulating plant hormones, enhancing osmoprotectants’ production, activating antioxidant defenses, and suppressing pathogens through antifungal compounds, competitive root colonization, and induced systemic resistance. Findings from single-stress experiments show that <i>Pseudomonas</i> endophytes can boost drought tolerance by maintaining osmotic balance and antioxidant activity, while also limiting <i>F. verticillioides</i> infection and toxin production. However, studies examining their effectiveness under the combined pressures of drought and fungal attack remain limited. This review brings together current knowledge on the mechanisms, case studies, and practical constraints of <i>Pseudomonas</i>-mediated stress relief in maize, highlighting research gaps and setting priorities for strain selection, microbial consortia design, and large-scale field testing. Harnessing these bacteria could be a key step toward building climate-resilient maize production systems that protect both yields and grain safety in an era of environmental uncertainty.</p> Graphical abstract <p>Exogenous application of <i>Pseudomonas</i> spp. modulate drought and <i>Fusarium verticillioides</i>.</p>

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The potential of Pseudomonas spp. as sustainable bioinoculants for enhancing maize growth and integrated management of drought and Fusarium verticillioides stress

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月28日

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  • Khethiwe Ndlazi,
  • Siyabonga Ntshalintshali,
  • Lungelo Buthelezi,
  • Ashwil Klein,
  • Marshall Keyster,
  • Mbukeni Nkomo,
  • Arun Gokul

摘要

Main conclusion

The review highlights PGPR (e.g., Pseudomonas spp.) as sustainable, low-cost solution to mitigate drought and Fusarium stress in maize, enhancing yield and resilience.

Abstract

Maize (Zea mays L.) is a vital staple crop worldwide, yet its productivity is under growing pressure from the combined effects of drought and Fusarium verticillioides infection. These stresses often occur together, compounding the damage. Drought limits water availability, disrupts nutrient uptake, and slows photosynthesis, while also making plants more vulnerable to disease. In turn, F. verticillioides harms plant tissues, contaminates grain with fumonisins, and can further intensify water stress. Conventional approaches such as irrigation, fungicides, and resistant cultivars often fall short when both stresses occur simultaneously. In recent years, plant growth-promoting rhizobacteria (PGPR), particularly Pseudomonas spp., have gained attention as eco-friendly partners in managing these challenges. These beneficial bacteria support maize growth by improving nutrient availability, regulating plant hormones, enhancing osmoprotectants’ production, activating antioxidant defenses, and suppressing pathogens through antifungal compounds, competitive root colonization, and induced systemic resistance. Findings from single-stress experiments show that Pseudomonas endophytes can boost drought tolerance by maintaining osmotic balance and antioxidant activity, while also limiting F. verticillioides infection and toxin production. However, studies examining their effectiveness under the combined pressures of drought and fungal attack remain limited. This review brings together current knowledge on the mechanisms, case studies, and practical constraints of Pseudomonas-mediated stress relief in maize, highlighting research gaps and setting priorities for strain selection, microbial consortia design, and large-scale field testing. Harnessing these bacteria could be a key step toward building climate-resilient maize production systems that protect both yields and grain safety in an era of environmental uncertainty.

Graphical abstract

Exogenous application of Pseudomonas spp. modulate drought and Fusarium verticillioides.