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<p>Wastewater irrigation negatively affects plant growth by limiting nutrient uptake, disrupting chlorophyll synthesis and function, and intensifying oxidative stress. Despite promising laboratory findings, field-based evidence on microbial mitigation of wastewater-induced stress remains limited, highlighting the need for practical validation under realistic agricultural conditions. Wastewater treatment significantly reduced the uptake of essential nutrients, including nitrogen (N), potassium (K), zinc (Zn), and iron (Fe), resulting in suppressed plant growth. Moreover, oxidative stress markers such as hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), malondialdehyde (MDA), and lipoxygenase (LOX) activity increased markedly, indicating enhanced membrane damage and cellular stress. In contrast, inoculation with <i>A. schindleri</i> SR-5–1 improved nutrient acquisition and strengthened the antioxidant defense system. Treated plants showed increased activities of key antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX). Non-enzymatic antioxidants, such as ascorbate (AsA) and glutathione (GSH), were also elevated, contributing to reduced oxidative damage. These physiological improvements were accompanied by enhanced biomass accumulation and higher chlorophyll content. Overall, this field-based validation demonstrates that <i>A. schindleri</i> SR-5–1 is an effective and eco-friendly bioinoculant that improves nutrient use efficiency, mitigates oxidative stress, and sustains pea plant growth under wastewater-irrigated conditions.</p>

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Bridging Lab to Land: Field Validation of Acinetobacter schindleri SR-5–1 for Nutrient Acquisition and Oxidative Stress Mitigation in Wastewater-Irrigated Pea (Pisum sativum L.) Plants

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • Sherjeel Hashmat,
  • Muhammad Arslan Ashraf,
  • Muhammad Tariq Javed,
  • Umer Farooq,
  • Mobeen Umer

摘要

Wastewater irrigation negatively affects plant growth by limiting nutrient uptake, disrupting chlorophyll synthesis and function, and intensifying oxidative stress. Despite promising laboratory findings, field-based evidence on microbial mitigation of wastewater-induced stress remains limited, highlighting the need for practical validation under realistic agricultural conditions. Wastewater treatment significantly reduced the uptake of essential nutrients, including nitrogen (N), potassium (K), zinc (Zn), and iron (Fe), resulting in suppressed plant growth. Moreover, oxidative stress markers such as hydrogen peroxide (H2O2), malondialdehyde (MDA), and lipoxygenase (LOX) activity increased markedly, indicating enhanced membrane damage and cellular stress. In contrast, inoculation with A. schindleri SR-5–1 improved nutrient acquisition and strengthened the antioxidant defense system. Treated plants showed increased activities of key antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX). Non-enzymatic antioxidants, such as ascorbate (AsA) and glutathione (GSH), were also elevated, contributing to reduced oxidative damage. These physiological improvements were accompanied by enhanced biomass accumulation and higher chlorophyll content. Overall, this field-based validation demonstrates that A. schindleri SR-5–1 is an effective and eco-friendly bioinoculant that improves nutrient use efficiency, mitigates oxidative stress, and sustains pea plant growth under wastewater-irrigated conditions.