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Heavy-metal resistance mechanisms developed by bacteria from Lerma-Chapala basin.
Arroyo-Herrera, Ivan; Román-Ponce, Brenda; Reséndiz-Martínez, Ana Laura; Estrada-de Los Santos, Paulina; Wang, En Tao; Vásquez-Murrieta, María Soledad.
Affiliation
  • Arroyo-Herrera I; Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas., Prolongación Carpio y Plan de Ayala S/N, Col. Santo Tomás. Alcaldía. Miguel Hidalgo, C.P. 11340, México city, Ciudad de México, México.
  • Román-Ponce B; Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas., Prolongación Carpio y Plan de Ayala S/N, Col. Santo Tomás. Alcaldía. Miguel Hidalgo, C.P. 11340, México city, Ciudad de México, México.
  • Reséndiz-Martínez AL; Departamento de Microbiología y Genética, Edificio Departamental, Lab. 214, Campus Unamuno, 37007, Salamanca, Spain.
  • Estrada-de Los Santos P; Universidad Politécnica del Estado de Morelos, Boulevard Cuauhnáhuac 556, Lomas del Texcal, 62550, Jiutepec, Morelos, México.
  • Wang ET; Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas., Prolongación Carpio y Plan de Ayala S/N, Col. Santo Tomás. Alcaldía. Miguel Hidalgo, C.P. 11340, México city, Ciudad de México, México.
  • Vásquez-Murrieta MS; Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas., Prolongación Carpio y Plan de Ayala S/N, Col. Santo Tomás. Alcaldía. Miguel Hidalgo, C.P. 11340, México city, Ciudad de México, México.
Arch Microbiol ; 203(4): 1807-1823, 2021 May.
Article in En | MEDLINE | ID: mdl-33491161
Heavy-metal (HM) contamination is a huge environmental problem in many countries including Mexico. Currently, microorganisms with multiple heavy-metal resistance and/or plant-promoting characteristics have been widely used for bioremediation of HM-contaminated soils. The aim of the study was isolated bacteria with multiple heavy-metal resistance and to determinate the resistance mechanism developed by these organisms. A total of 138 aerobic bacteria were isolated from soil and sediments surrounding the Lerma-Chapala basin located in the boundary of the States of Michoacán and Jalisco states of Mexico. One hundred and eight strains showed at least 1 plant growth-promoting features. The Lerma-Chapala basin bacteria were also resistant to high concentrations of HMs including the metalloid arsenic. Sequence analysis of 16S RNA genes reveled that these bacteria were mainly affiliated to the phyla Proteobacteria (38%), Firmicutes (31%) and Actinobacteria (25%), covering 21 genera with Bacillus as the most abundant one. Among them, at least 27 putative novel species were detected in the genera Acinetobacter, Arthrobacter, Bacillus, Agrobacterium, Dyadobacter, Enterobacter, Exiguobacterium, Kluyvera, Micrococcus, Microbacterium and Psychrobacter. In addition, these bacteria developed various heavy-metal-resistance mechanisms, such as biosorption/bioaccumulation, immobilization and detoxification. Therefore, the bacteria isolated from soils and sediments of Lerma-Chapala basin could be used in bioremediation strategies.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Bacteria / Biodegradation, Environmental / Metals, Heavy / Drug Resistance, Bacterial Country/Region as subject: Mexico Language: En Journal: Arch Microbiol Year: 2021 Document type: Article Country of publication: Germany

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Bacteria / Biodegradation, Environmental / Metals, Heavy / Drug Resistance, Bacterial Country/Region as subject: Mexico Language: En Journal: Arch Microbiol Year: 2021 Document type: Article Country of publication: Germany