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<p>World’s largest vegetable crop tomato is of great economic importance, but its production is highly affected by salinity which devastates tomato yield. The use of plant growth promoting beneficial microbes is the most sustainable technique to alleviate salt stress. This study was carried out to investigate the impact of halotolerant endophytic <i>Pseudomonas </i>(<i>P.&#xa0;fluorescens </i>8C, <i>P.&#xa0;fluorescens </i>7A, <i>P.&#xa0;fluorescens </i>2B and <i>P.&#xa0;fluorescens </i>6C) on tomato plants under salinity (2% NaCl) stress<i>. In vitro</i> studies revealed that all the isolates were able to produce enzymes like invertase, gelatinase, arginase, cellulase, urease which indicates the role of enzyme production in reducing salt stress and improving productivity. All the isolates were positive for phosphate solubilization, IAA production, HCN production and gelatin liquification. In screen house experiment, the application of <i>Pseudomonas</i> strains helps to boost up plant immunity by showing healthy growth and also increase content of chlorophyll&#xa0;a, chlorophyll&#xa0;b, total chlorophyll, RWC%, protein, carbohydrate) as well as enzymatic activities (phenolic, catalase activity, POD activity, SOD activity) while, declined electrolyte leakage and MDA content (lipid peroxidation marker) in both saline and non-saline conditions with respect to their control treatments. Among the four isolates <i>P.&#xa0;fluorescens</i> 8C shows compatible results to <i>P.&#xa0;fluorescens</i> 7A, and <i>P.&#xa0;fluorescens</i> 2B shows compatible results to <i>P.&#xa0;fluorescens</i>6C. Application of <i>Pseudomonas </i>strains may be used in agriculture field in order to improve productivity even when plants are in stress condition. <i>Pseudomonas </i>strains act as biological strains that also play a&#xa0;role by producing different sorts of enzymes that reduce stress in plants.</p>

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Enhancing Salt Tolerance in Tomato Crop Using Microbial Inoculants

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Farheen Islam,
  • Afshan Rahman,
  • Hafiza Farhat,
  • Urooj Muhammad Sharif,
  • Nawal Gul,
  • Areeba Aslam

摘要

World’s largest vegetable crop tomato is of great economic importance, but its production is highly affected by salinity which devastates tomato yield. The use of plant growth promoting beneficial microbes is the most sustainable technique to alleviate salt stress. This study was carried out to investigate the impact of halotolerant endophytic Pseudomonas (P. fluorescens 8C, P. fluorescens 7A, P. fluorescens 2B and P. fluorescens 6C) on tomato plants under salinity (2% NaCl) stress. In vitro studies revealed that all the isolates were able to produce enzymes like invertase, gelatinase, arginase, cellulase, urease which indicates the role of enzyme production in reducing salt stress and improving productivity. All the isolates were positive for phosphate solubilization, IAA production, HCN production and gelatin liquification. In screen house experiment, the application of Pseudomonas strains helps to boost up plant immunity by showing healthy growth and also increase content of chlorophyll a, chlorophyll b, total chlorophyll, RWC%, protein, carbohydrate) as well as enzymatic activities (phenolic, catalase activity, POD activity, SOD activity) while, declined electrolyte leakage and MDA content (lipid peroxidation marker) in both saline and non-saline conditions with respect to their control treatments. Among the four isolates P. fluorescens 8C shows compatible results to P. fluorescens 7A, and P. fluorescens 2B shows compatible results to P. fluorescens6C. Application of Pseudomonas strains may be used in agriculture field in order to improve productivity even when plants are in stress condition. Pseudomonas strains act as biological strains that also play a role by producing different sorts of enzymes that reduce stress in plants.