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ARTICLE IN Volume 19, 2024 - Number 1

WASHING OF HEAVY METAL-CONTAMINATED SOILS USING PYOVERDINE EXTRACTED FROM PLANT GROWTH-PROMOTING BACTERIA PSEUDOMONAS LACTIS AND P. ATACAMENSIS



Hibat Errahmen MAZARI1*, Amina MELIANI2, Samir BERKAT1, Samia ALIANE1, Rachid DJIBAOUI3, & Kaddour BOUDEROUA4
1Geo-environment and space development laboratory (LGEDE), Faculty of Nature and Life Science, University of Mustapha Stambouli, Mascara, Algeria
2Department of Biology, Faculty of Nature and Life Science, University Mustapha Stambouli, Mascara, Algeria
3Laboratory of Microbiology and Plant Biology, Faculty of Nature and Life Science,
University of Abdlhamid Ibn Badis, Mostaganem, Algeria
4Laboratory of Biotechnology Applied to Agriculture and Environmental Preservation in Higher School of Agronomy “Mohamed El Amjed Ben Abdel Malek”, Hall Technology Kharouba, Mostaganem-Algeria.
*Correspondence: hibaterrahmen.mazari@univ-mascara.dz


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Abstract

Soil contamination by metallic trace elements (MTEs) poses a significant environmental challenge, with far-reaching implications for human health and biodiversity. In this context, the exploration of biological methods for chelating MTEs has emerged as a promising, environmentally sustainable approach. Notably, certain metallophores, particularly pyoverdine, demonstrate effective scavenging properties, offering a viable solution. This study involved screening forty-five Pseudomonas isolates for their potential to extract these metals from contaminated soils. Additionally, we monitored the synthesis of various metabolites, including siderophores, indole-3-acetic acid (IAA), ammonia, hydrogen cyanide (HCN), and phosphate solubilization. The purified siderophore fraction was characterized using Fourier Transform Infrared Spectroscopy (FT-IR). Results indicated a notably higher level of siderophore production in P. lactis, P. atacamensis, and Pseudomonas sp. PS11. Particularly, the pyoverdine from P. lactis demonstrated a higher binding affinity for bromine, tin, rhodium, and lead. Our findings conclude that pyoverdine extracted from P. atacamensis exhibited an enhanced capacity for copper ion removal (49.63%), surpassing that of P. lactis (47.65%) and the control agents (EDTA and citric acid, ranging from 43.11% to 27.58%).

Keywords:

  • Soil
  • contamination
  • metallic
  • trace
  • elements
  • pyoverdine
  • remove
  • PGPR

How to cite

WASHING OF HEAVY METAL-CONTAMINATED SOILS USING PYOVERDINE EXTRACTED FROM PLANT GROWTH-PROMOTING BACTERIA PSEUDOMONAS LACTIS AND P. ATACAMENSIS, Carpathian Journal of Earth and Environmental Sciences February 2024, Vol. 19, No. 1, p. 169 – 178; DOI:10.26471/cjees/2024/019/288

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