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<p>Phosphogypsum (PG) is a byproduct of the phosphate fertilizer manufacturing process that deserves to be promoted in agriculture. Many studies assess the effect of the application of PG on the arbuscular mycorrhizal fungi (AMF) or plant growth promoting rhizobacteria (PGPR) inoculation. Nevertheless, no report has investigated the impact of these beneficial microorganisms’ inoculation on enhancing plant growth and production in phosphogypsum-compost-amended soil. In this context, a greenhouse trial with fourteen treatments was carried out and distributed into two sets: i) well-watered (WW) tomato plants irrigated with 75% of field capacity (FC) during the whole experiment, and (ii) water-stressed (WS, 35% FC) plants. The impacts of PG, water scarcity, organic amendment, and the effectiveness of selected bio-inoculants were assessed by measuring plant growth traits, yield, osmolyte content, nutrient uptake, and antioxidant activity. Drought stress and the application of PG adversely affect plant growth, yield, photosynthetic pigments, and fruit quality. They induced an overproduction of oxidative stress markers (malondialdehyde and hydrogen peroxide), proline, and antioxidant enzymes. However, applying compost alone and especially in combination with PGPR and/or AMF lessened their negative effect by increasing growth rates, and biochemical and photosynthetic compounds compared to the control plants. The dual inoculation of PGPR and AMF resulted in significant high growth, yield, chlorophyll pigments, fruit quality, and the highest decrease in oxidative stress markers. Therefore, applying PGPR and AMF might be an interesting and eco-friendly strategy to valorize PG which is widely produced in huge quantities.</p>

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Drought Stress Mitigation in Tomato Through Combined Use of Plant Growth Promoting Rhizobacteria, Arbuscular Mycorrhizal Fungi, and Organic-Mineral Amendments

  • 期刊论文

  • 发表日期：

    2025年8月4日

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  • Abdel-ilah Tahiri,
  • Aiman Slimani,
  • Anas Raklami,
  • Abdelilah Meddich,
  • Khalid Oufdou

摘要

Phosphogypsum (PG) is a byproduct of the phosphate fertilizer manufacturing process that deserves to be promoted in agriculture. Many studies assess the effect of the application of PG on the arbuscular mycorrhizal fungi (AMF) or plant growth promoting rhizobacteria (PGPR) inoculation. Nevertheless, no report has investigated the impact of these beneficial microorganisms’ inoculation on enhancing plant growth and production in phosphogypsum-compost-amended soil. In this context, a greenhouse trial with fourteen treatments was carried out and distributed into two sets: i) well-watered (WW) tomato plants irrigated with 75% of field capacity (FC) during the whole experiment, and (ii) water-stressed (WS, 35% FC) plants. The impacts of PG, water scarcity, organic amendment, and the effectiveness of selected bio-inoculants were assessed by measuring plant growth traits, yield, osmolyte content, nutrient uptake, and antioxidant activity. Drought stress and the application of PG adversely affect plant growth, yield, photosynthetic pigments, and fruit quality. They induced an overproduction of oxidative stress markers (malondialdehyde and hydrogen peroxide), proline, and antioxidant enzymes. However, applying compost alone and especially in combination with PGPR and/or AMF lessened their negative effect by increasing growth rates, and biochemical and photosynthetic compounds compared to the control plants. The dual inoculation of PGPR and AMF resulted in significant high growth, yield, chlorophyll pigments, fruit quality, and the highest decrease in oxidative stress markers. Therefore, applying PGPR and AMF might be an interesting and eco-friendly strategy to valorize PG which is widely produced in huge quantities.