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Assessing nickel tolerance of bacteria isolated from serpentine soils.


ABSTRACT: Serpentine soils present unique characteristics such as a low Ca/Mg ratio, low concentration of nutrients, and a high concentration of heavy metals, especially nickel. Soil bacterial isolates from an ultramafic complex located in the tropical savanna known as the Brazilian Cerrado were studied. Nickel-tolerant bacteria were obtained, and their ability to remove nickel from a culture medium was assessed. Bacterial isolates presented higher tolerance to nickel salts than previously reported for bacteria obtained from serpentine environments in other regions of the world. In addition, the quantification of nickel in cell pellets indicated that at least four isolates may adsorb soluble forms of nickel. It is expected that information gathered in this study will support future efforts to exploit serpentine soil bacteria for biotechnological processes involving nickel decontamination from environmental samples.

SUBMITTER: Costa FS 

PROVIDER: S-EPMC6863204 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Assessing nickel tolerance of bacteria isolated from serpentine soils.

Costa Flávio Silva FS   Macedo Maria Wanna Figueiredo Sena MWFS   Araújo Ana Carolina Moreira ACM   Rodrigues Cassimira Albuquerque CA   Kuramae Eiko Eurya EE   de Barros Alcanfor Silvia Keli SK   Pessoa-Filho Marco M   Barreto Cristine Chaves CC  

Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] 20190711 3


Serpentine soils present unique characteristics such as a low Ca/Mg ratio, low concentration of nutrients, and a high concentration of heavy metals, especially nickel. Soil bacterial isolates from an ultramafic complex located in the tropical savanna known as the Brazilian Cerrado were studied. Nickel-tolerant bacteria were obtained, and their ability to remove nickel from a culture medium was assessed. Bacterial isolates presented higher tolerance to nickel salts than previously reported for ba  ...[more]

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