Molecular characterization and soil bioremediation of Clodinafop-propargyl by a novel bacterial consortium

Faculty Agriculture Year: 2025
Type of Publication: ZU Hosted Pages:
Authors:
Journal: Environmental Technology & Innovation Elsevier Volume:
Keywords : Molecular characterization , soil bioremediation , Clodinafop-propargyl , , novel    
Abstract:
Clodinafop-propargyl (CF) is a widely used herbicide with high persistence in soil, raising concerns about its long-term environmental impact. Bacterial biodegradation provides a sustainable and eco-friendly strategy to mitigate CF contamination. This study evaluated the in-situ bioremediation potential of a six-member bacterial consortium (T3) by measuring CO₂ evolution as an indicator of microbial activity and monitoring CF residues in two soil types using microcosm systems. The consortium included Bacillus subtilis subsp. subtilis AZFS3 (LC599401.1), Bacillus pumilus AZFS5 (LC599402.1), Bacillus mojavensis AZFS15 (LC599403.1), Bacillus paramycoides AZFS18 (LC599406.1), Pseudomonas aeruginosa KZFS4 (LC599404.1), and Alcaligenes aquatilis KZFS11 (LC599405.1). T3 performance was compared to two individual strains representing Gram-positive and Gram-negative bacteria: B. subtilis subsp. subtilis AZFS3 (T1) and P. aeruginosa KZFS4 (T2). T3 achieved the highest degradation efficiency among all treatments, with CO₂ emissions nearing zero by day 20 (0.120 mg CO₂/100 g/DW. soil, equivalent to 0.63 % CF residue in sandy loam). CF residues were significantly reduced to 0.34 % (0.16 mg/kg sandy loam soil) and 6.38 % (2.99 mg/kg clay soil), underscoring the consortium’s strong bioremediation capacity, as determined by HPLC. Metabolite profiling, gene expression analysis, and pathway prediction further supported the consortium’s superiority over individual strains. The enzymes required for CF degradation were distributed across all six bacterial strains. The molecular characterization of the CF degradation pathway, using integrated bioinformatic and experimental approaches, confirmed its collective encoding by the individual members of the bacterial hexa-consortium. The Maleylacetate reductase (EC 1.3.1.32), crucial for the complete CF breakdown, was found exclusively in P. aeruginosa, suggesting a potential enzymatic bottleneck and a limiting factor. Future research should focus on enriching the consortium with additional strains expressing this enzyme to provide other alternatives capable of enhancing the degradation efficiency. The six-strain consortium offers a practical and environmentally sound solution for remediating CF-contaminated soils.
   
     
 
       

Author Related Publications

  • Mohammed Abdel-Moneim Fahmy, "MICROBIAL BIODEGRADATION POTENTIAL OF PETROLEUM-AND NATURE OILS BY INDIGENOUS HYDROCARBON DEGRADING BACTERIA ISOLATED FROM PETRO-CONTAMINATED SITES", Agric. Microbiol. Dept., Fac. Agric., Zagazig Univ., Egypt, 2017 More
  • Mohammed Abdel-Moneim Fahmy, "دراسات على التحلل الحيوى للهيدروكربون بواسطة الميكروبات", Zagazig J. Agric. Res, 2018 More
  • Mohammed Abdel-Moneim Fahmy, "Valorization of fish oil from processing by-products: Composition, nutritional value, and potential applications", Elsevier, 2025 More
  • Mohammed Abdel-Moneim Fahmy, "Ultraviolet processing for mycotoxin mitigation: A sustainable approach to enhancing food safety and security", Elsevier, 2025 More
  • Mohammed Abdel-Moneim Fahmy, "Biodegradation of Chlorantraniliprole and Flubendiamide by Some Bacterial Strains Isolated from Different Polluted Sources", MDPI, 2022 More

Department Related Publications

  • Mohamed TalaatAbdou Mohamed El-Sadony, "Biosynthesis, Optimization and Characterization of Silver Nanoparticles Using a Soil Isolate of Bacillus pseudomycoides MT32 and their Antifungal Activity Against some Pathogenic Fungi", Biosynthesis, Optimization, 2019 More
  • Samir Ahmed Merghani Mahgoub, "Enhancement of drought tolerance in diverse Vicia faba cultivars by inoculation with plant growth-promoting rhizobacteria under newly reclaimed soil conditions", Nature, 2021 More
  • Mohamed TalaatAbdou Mohamed El-Sadony, "The potency of newly development H5N8 and H9N2 avian influenza vaccines against the isolated strains in laying hens from Egypt during 2019", ُELSEVIR, 2021 More
  • Samir Ahmed Merghani Mahgoub, "Productive performance, fertility and hatchability, blood indices and gut microbial load in laying quails as affected by two types of probiotic bacteria", Elsevier, 2021 More
  • Mohamed TalaatAbdou Mohamed El-Sadony, "Impacts of Supplementing Broiler Diets with Biological Curcumin, Zinc Nanoparticles and Bacillus licheniformis on Growth, Carcass Traits, Blood Indices, Meat Quality and Cecal Microbial Load", MDPI, 2021 More
Tweet