Bioremediation of heavy metal-polluted environments by non-living cells from rhizobial isolates.

Autor: Moretto C; Departamento de Biotecnologia Agropecuária e Ambiental, Faculdade de Ciências Agrárias E Veterinárias, UNESP - Univ Estadual Paulista, Rodovia Prof. Paulo Donato Castellane km 135, CEP, Jaboticabal, SP, 14884-900, Brazil., Castellane TCL; Departamento de Biotecnologia Agropecuária e Ambiental, Faculdade de Ciências Agrárias E Veterinárias, UNESP - Univ Estadual Paulista, Rodovia Prof. Paulo Donato Castellane km 135, CEP, Jaboticabal, SP, 14884-900, Brazil. terezacastellane@gmail.com., Leonel TF; Departamento de Biotecnologia Agropecuária e Ambiental, Faculdade de Ciências Agrárias E Veterinárias, UNESP - Univ Estadual Paulista, Rodovia Prof. Paulo Donato Castellane km 135, CEP, Jaboticabal, SP, 14884-900, Brazil., Campanharo JC; Departamento de Biotecnologia Agropecuária e Ambiental, Faculdade de Ciências Agrárias E Veterinárias, UNESP - Univ Estadual Paulista, Rodovia Prof. Paulo Donato Castellane km 135, CEP, Jaboticabal, SP, 14884-900, Brazil., de Macedo Lemos EG; Departamento de Biotecnologia Agropecuária e Ambiental, Faculdade de Ciências Agrárias E Veterinárias, UNESP - Univ Estadual Paulista, Rodovia Prof. Paulo Donato Castellane km 135, CEP, Jaboticabal, SP, 14884-900, Brazil.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2022 Jul; Vol. 29 (31), pp. 46953-46967. Date of Electronic Publication: 2022 Feb 17.
DOI: 10.1007/s11356-022-18844-5
Abstrakt: Rhizosphere bacteria, for example, rhizobia, can play several roles, and one of the most important, the protection of plant roots against toxic conditions and other environmental stresses. In this work, the action of Cu 2+ and Cr 6+ on cell growth and EPS production of four strains of rhizobia, Rhizobium tropici (LBMP-C01), Ensifer sp. (LBMP-C02 and LBMP-C03), and Rhizobium sp. LBMP-C04, were tested. The results confirmed the strong effect of Cu 2+ and Cr 6+ on bacterial exopolysaccharides (EPS) synthesis, and how cells can adsorb these metals, which may be a key factor in the interactions between rhizosphere bacteria and host plants in heavy metal-contaminated soils. Here, we emphasize the importance of proving the potential of treating bacterial cells and their extracellular EPS to promote the bio-detoxification of terrestrial and aquatic systems contaminated by heavy metals in a highly sustainable, economic, and ecological way.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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