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Abiotic stresses such as salinity, drought, light intensity, heavy metals, and pesticides significantly affect global crop production and food security. These stresses can lead to the production of reactive oxygen species (ROS), including superoxide anion, hydrogen peroxide, and hydroxyl radicals, which damage cellular components like lipids, proteins, and DNA. However, ROS also play a role in triggering adaptive responses in plants. Abiotic stresses impact the rhizosphere, affecting root growth, nutrient uptake, and plant–microbe interactions, ultimately influencing plant health and productivity. Plants have developed antioxidant defense systems, including enzymes like superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbate peroxidase (APX), which help to protect against oxidative stress by maintaining cellular balance. Plant growth-promoting rhizobacteria (PGPRs) and plant growth regulators (PGRs) further support plants by producing stress-related proteins, regulating osmotic balance, and scavenging ROS. The presence of PGPRs in the rhizosphere enhances plant growth by improving nutrient availability and by boosting nutrient uptake. The present chapter explores the synergistic effects of PGPRs and PGRs,offering protection against various environmental stresses, thereby further promoting sustainable agriculture.

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Mitigating ROS Levels Under Abiotic Stress: The Synergistic Role of PGPR and Plant Growth Regulators

  • 章节

  • 发表日期：

    2026年

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  • Nitika Kapoor,
  • Amandeep Singh,
  • Manu Sharma,
  • Tamanna Bhardwaj,
  • Nahida Rehman Mir,
  • Kamini Devi,
  • Jaspreet Kour,
  • Pooja Sharma,
  • Aman Kumar,
  • Renu Bhardwaj

摘要

Abiotic stresses such as salinity, drought, light intensity, heavy metals, and pesticides significantly affect global crop production and food security. These stresses can lead to the production of reactive oxygen species (ROS), including superoxide anion, hydrogen peroxide, and hydroxyl radicals, which damage cellular components like lipids, proteins, and DNA. However, ROS also play a role in triggering adaptive responses in plants. Abiotic stresses impact the rhizosphere, affecting root growth, nutrient uptake, and plant–microbe interactions, ultimately influencing plant health and productivity. Plants have developed antioxidant defense systems, including enzymes like superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbate peroxidase (APX), which help to protect against oxidative stress by maintaining cellular balance. Plant growth-promoting rhizobacteria (PGPRs) and plant growth regulators (PGRs) further support plants by producing stress-related proteins, regulating osmotic balance, and scavenging ROS. The presence of PGPRs in the rhizosphere enhances plant growth by improving nutrient availability and by boosting nutrient uptake. The present chapter explores the synergistic effects of PGPRs and PGRs,offering protection against various environmental stresses, thereby further promoting sustainable agriculture.