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<p>Wheat (<i>Triticum aestivum</i>) is an important cereal crop worldwide and drought acts as a&#xa0;major constraint for its production. In this study, plant growth-promoting rhizobacteria (PGPR) were explored for their potential to eradicate drought stress in wheat. Eighty-five isolates were obtained from the rhizosphere of cereals and evaluated for drought stress tolerance. Twenty out of 85&#xa0;isolates tolerated drought by showing cell survival (40–90%) across different osmotic potentials (0.05–0.75 MPa). Two isolates BM‑Q and BM‑T showed the highest drought tolerance potential with cell survival ability of &gt; 90%. These isolates displayed various stress tolerance traits such as 1‑aminocyclopropane-1-carboxylic acid (ACC) deaminase activity, exopolysaccharides (EPS), and plant growth promoting (PGP) traits like siderophore production (discoloration index = 5.2–6.5) and phosphate solubilization (solubilization index of 3–3.3). These strains (BM‑T and BM-Q) mitigated the harmful effects of water stress on wheat either inoculated individually or in consortium. Their inoculation enhanced both root and shoot growth (1.3–2.8 fold over control), fresh weight (1.3–2.1fold), dry weight (1.8–2.7 fold), leaf area (1.6–1.9 fold), relative water content (2.1–2.3 fold), photosynthetic pigments (Chl a&#xa0;&amp; b = 1.9–3.7 fold, carotenoid = 1.73–2.3 fold) and antioxidant enzyme’s activity (1.3–1.5 fold) under drought stress. These findings reveal that the inoculation of these strains could be a&#xa0;viable strategy to lessen the harmful impact of drought stress in wheat.</p>

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Serratia marcescens Isolated from the Cereals of Multi-Copping Systems Mitigate Drought Stress in Wheat (Triticum aestivum. L.)

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Madiha Shoukat,
  • Maha binte Masood,
  • Pari Wash,
  • Muhammad Nadeem Hassan

摘要

Wheat (Triticum aestivum) is an important cereal crop worldwide and drought acts as a major constraint for its production. In this study, plant growth-promoting rhizobacteria (PGPR) were explored for their potential to eradicate drought stress in wheat. Eighty-five isolates were obtained from the rhizosphere of cereals and evaluated for drought stress tolerance. Twenty out of 85 isolates tolerated drought by showing cell survival (40–90%) across different osmotic potentials (0.05–0.75 MPa). Two isolates BM‑Q and BM‑T showed the highest drought tolerance potential with cell survival ability of > 90%. These isolates displayed various stress tolerance traits such as 1‑aminocyclopropane-1-carboxylic acid (ACC) deaminase activity, exopolysaccharides (EPS), and plant growth promoting (PGP) traits like siderophore production (discoloration index = 5.2–6.5) and phosphate solubilization (solubilization index of 3–3.3). These strains (BM‑T and BM-Q) mitigated the harmful effects of water stress on wheat either inoculated individually or in consortium. Their inoculation enhanced both root and shoot growth (1.3–2.8 fold over control), fresh weight (1.3–2.1fold), dry weight (1.8–2.7 fold), leaf area (1.6–1.9 fold), relative water content (2.1–2.3 fold), photosynthetic pigments (Chl a & b = 1.9–3.7 fold, carotenoid = 1.73–2.3 fold) and antioxidant enzyme’s activity (1.3–1.5 fold) under drought stress. These findings reveal that the inoculation of these strains could be a viable strategy to lessen the harmful impact of drought stress in wheat.