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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2021, Volume : 9, Issue : 1
First page : (7) Last page : (11)
Article doi: :

Root Promotion of Acacia farnesiana by PGPB in Mine Tailings

Patricio-Hernández A.1, Ramírez-Peralta A.2, Romero Ramírez Y.1, Toledo Hernández E.1, Urióstegui Acosta M.3 and Toribio-Jiménez J.1*
1Laboratory of Molecular Microbiology and Environmental Biotechnology,
Faculty of Chemical-Biological Sciences, Autonomous University of Guerrero, Mexico
2Laboratory of Microbial Patometabolism, Faculty of Chemical-Biological Sciences,
Autonomous University of Guerrero, Mexico
3Laboratory of Immunotoxigenomics, Higher School of Natural Sciences,
Autonomous University of Guerrero, Mexico
*Corresponding Author E-mail:
Received: 2.12.2020 | Revised: 10.01.2021 | Accepted: 18.01.2021 


The mining activity has generated a large amount of waste called tailings; unfortunately, these contain EPT that affect environmental and human health. Phytoremediation assisted with PGPB is one of the strategies used to mitigate its toxic effects. We evaluated the effect of the PGPB tolerant to heavy metals on the Acacia farnesiana rhizosphere in substrates with different concentrations of tailings. For this, 28 bacterial strains of the A. farnesiana rhizosphere were identified and the MIC to heavy metals and metalloids was determined. In the same way, the plant promotion mechanisms were detected, and the effect capacity in the weight and length of the A. farnesiana rhizosphere was determined with three consortiums (A, B, and C, all including various combinations of Bacillus sp, Enterobacter sp and P. putida JM1) in different concentrations of tailings and amendments for 98 days. All the strains were tolerant to heavy metals and were able to produce IAA, fix N2, solubilize phosphates, siderophores, and lytic enzymes. Additionally, only the consortiums A and B were statistically significant in the dry weight of the root with 90 and 100% of substrate with tailings; in length, only a statistically significant difference was observed when the seed inoculated with consortium A was planted with 80% of tailing substrate. The data provide information on the plant-microorganism relationship to use mineral-based phytoremediation strategies with PGPB.

Keywords: Mine tailings, PGPB, A. farnesiana, Phytoremediation, Rhizosphere.

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Cite this article: Patricio-Hernández, A., Ramírez-Peralta, A., Romero Ramírez, Y., Toledo Hernández, E., Urióstegui Acosta, M., & Toribio-Jiménez, J. (2021). Root Promotion of Acacia farnesiana by PGPB in Mine Tailings, Ind. J. Pure App. Biosci. 9(1), 7-11. doi: