Mercury tolerance of Penicillium sp isolated from kefir grains

Authors

DOI:

https://doi.org/10.5902/2179460X33442

Keywords:

Kefir grains, Bioabsorption, Inorganic contaminants, Probiotics

Abstract

Inorganic contaminant contamination poses the greatest threat to the environment and human health. It has been recently reported that probiotics protect the body from inorganic contaminant damage by the bioabsorption capacity of its components. Kefir is a beverage obtained through the fermentation metabolized by Lactobacillus and yeasts that aggregate forming the grains of kefir. In order to isolate inorganic contaminant resistant microorganism, the kefir grains were crushed and the supernatant obtained was inoculated in malt-gar medium (2%) and cultured for 120 hours. Occurred formation of halos of growth which were measured every 24 hours. The isolated microorganism was also cultured in liquid medium for five days. The taxonomic analysis revealed to be fungus of the genus Penicillium. The results showed the capacity of mercury bioabsorption by Penicillium sp isolated from kefir. At pH 4.0 this activity did not suffer strong inhibition. Contrary to what was expected there was an increase in biomass when grown in liquid medium which suggests the formation of storage structures of the inorganic contaminant around the cell membrane. These results confirm that kefir contains in its composition microorganisms capable of protecting people who consume it from harmful damages caused by inorganic contaminants.

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Author Biographies

Antonio Ferreira Oliveira, Universidade Federal do Amapá, Macapá, AP

Pós-Doutorado na Universidade Federal do Amapá, Macapá, AP

Alexandro Cezar Florentino, Universidade Federal do Amapá, Macapá, AP

Professor Adjunto Nivel C da Universidade Federal do Amapá

Iracirema Silva Sena, Universidade Federal do Amapá, Macapá, AP

Doutorado em andamento em Biodiversidade Tropical, Universidade Federal do Amapá, Macapá, AP

Adriana Maciel Ferreira, Universidade Federal do Amapá, Macapá, AP

Técnica do laboratório de Pesquisa em Fármacos da Universidade Federal do Amapá

Roberto Messias Bezerra, Universidade Federal do Amapá, Macapá, AP

Professor Adjunto II da Universidade Federal do Amapá

José Carlos Tavares Carvalho, Universidade Federal do Amapá, Macapá, AP

Professor Titular da Universidade Federal do Amapá

Irlon Maciel Ferreira, Universidade Federal do Amapá, Macapá, AP

Professor Adjunto Nivel II da Universidade Federal do Amapá

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Published

2018-03-27

How to Cite

Oliveira, A. F., Florentino, A. C., Sena, I. S., Ferreira, A. M., Bezerra, R. M., Carvalho, J. C. T., & Ferreira, I. M. (2018). Mercury tolerance of Penicillium sp isolated from kefir grains. Ciência E Natura, 40, e73. https://doi.org/10.5902/2179460X33442

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Section

Environment

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