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Glyphosate Biodegradation by Airborne Plant Growth-Promoting Bacteria: Influence on Soil Microbiome Dynamics

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  • Beatriz Genoveva Guardado-Fierros

    (Unidad de Tecnología Ambiental, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C. (CIATEJ), Normalistas No. 800, Colinas de la Normal, Guadalajara 44270, JA, Mexico
    These authors contributed equally to this work.)

  • Miguel Angel Lorenzo-Santiago

    (Unidad de Tecnología Ambiental, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C. (CIATEJ), Normalistas No. 800, Colinas de la Normal, Guadalajara 44270, JA, Mexico
    These authors contributed equally to this work.)

  • Thiago Gumiere

    (Department of Soil and Agricultural Engineering, Laval University, Quebec City, QC G1V 0A6, Canada)

  • Lydia Aid

    (Department of Soil and Agricultural Engineering, Laval University, Quebec City, QC G1V 0A6, Canada)

  • Jacobo Rodriguez-Campos

    (Unidad de Servicios Analíticos y Metrológicos, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C. (CIATEJ), Guadalajara 44270, JA, Mexico)

  • Silvia Maribel Contreras-Ramos

    (Unidad de Tecnología Ambiental, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C. (CIATEJ), Normalistas No. 800, Colinas de la Normal, Guadalajara 44270, JA, Mexico)

Abstract

Due to its persistence, glyphosate contamination in soil poses environmental and health risks. Plant growth-promoting bacteria (PGPB) offer a potential solution for mitigating glyphosate pollution. This study assessed the glyphosate degradation capacity of three airborne PGPB isolates ( Exiguobacterium indicum AS03, Kocuria sediminis AS04, and Rhodococcus rhodochrous AS33) individually and in a consortium (CS) compared to natural attenuation in microcosms as the control (CTL), where soil autochthonous microorganisms (MS) were present. AS03 exhibited the highest glyphosate degradation (86.3%), followed by AS04 and AS33 at 14 days (61.6% and 64.7%). The consortium accelerated glyphosate removal, reaching 99.7%, while the control treatment removal was 94% at 60 days. Aminomethylphosphonic acid (AMPA) is the main metabolite in glyphosate degradation, and it had a maximum peak in concentration at 28 days in the CS + MS (1072 mg kg −1 ) and CTL (990 mg kg −1 ) treatments. Subsequently, a decrease in AMPA concentration was observed at 60 days up to 349 mg kg −1 and 390 mg kg −1 , respectively. These results suggested that soil autochthonous microorganisms and their interactions with a consortium have similar biotransformation of glyphosate, but the AMPA conversion to other intermedium metabolites through degradation was slow. A minimum AMPA concentration of 15–45 mg kg −1 over time was detected with the consortium. The microbiome analysis revealed shifts in microbial composition, with an increase in glyphosate-degrading genera like Psychrobacter and Lyzobacter . These changes enhance soil resilience and fertility, demonstrating the potential of airborne PGPB for bioremediation and environmental sustainability.

Suggested Citation

  • Beatriz Genoveva Guardado-Fierros & Miguel Angel Lorenzo-Santiago & Thiago Gumiere & Lydia Aid & Jacobo Rodriguez-Campos & Silvia Maribel Contreras-Ramos, 2025. "Glyphosate Biodegradation by Airborne Plant Growth-Promoting Bacteria: Influence on Soil Microbiome Dynamics," Agriculture, MDPI, vol. 15(4), pages 1-28, February.
    • Handle: RePEc:gam:jagris:v:15:y:2025:i:4:p:362-:d:1586408
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    References listed on IDEAS

    as
    1. Waqas Mohy-Ud-Din & Muhammad Javed Akhtar & Safdar Bashir & Hafiz Naeem Asghar & Muhammad Farrakh Nawaz & Feng Chen, 2023. "Isolation of Glyphosate-Resistant Bacterial Strains to Improve the Growth of Maize and Degrade Glyphosate under Axenic Condition," Agriculture, MDPI, vol. 13(4), pages 1-19, April.
    2. Simranjeet Singh & Vijay Kumar & Jatinder Pal Kaur Gill & Shivika Datta & Satyender Singh & Vaishali Dhaka & Dhriti Kapoor & Abdul Basit Wani & Daljeet Singh Dhanjal & Manoj Kumar & S. L. Harikumar & , 2020. "Herbicide Glyphosate: Toxicity and Microbial Degradation," IJERPH, MDPI, vol. 17(20), pages 1-18, October.
    Full references (including those not matched with items on IDEAS)

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