Evaluation of selenite bioremoval from liquid culture by Enterococcus species

Microbiological Research
Simone PienizAdriano Brandelli

Abstract

The genus Enterococcus belong to the genera of bacteria that produce lactic acid and can confer health benefits to living organisms. Selenium (Se) is an essential micronutrient for humans and animals. Thirty-six Enterococcus species isolated from dairy products were screened for Se(IV) sorption capacity for use as a probiotics in animal nutrition. Several isolates grew luxuriantly and significantly removed Se(IV) from Se(IV) amended medium. Two isolates, LAB 14 and LAB 18, identified by 16S rRNA gene sequence analysis as Enterococcus faecalis (98% nucleotide sequence similarity) and Enterococcus faecium (97% nucleotide sequence similarity), respectively, were selected for further studies. The two isolates grew optimally and removed selenium at initial pH 7.0. Optimum removal of Se(IV) from the medium was recorded at 25°C. Time course studies showed that after 8h of incubation LAB 14 and LAB 18 cultures displayed the highest biomass production and Se(IV) bioremoval and most selenite in culture depleted in 24h. At initial concentrations of 10 mg L(-1) and 60 mg L(-1), E. faecium (LAB 18) removed 9.91 mg L(-1) and 59.70 mg L(-1), respectively after 24h. Similar Se(IV) bioremoval capacity was recorded with E. faecalis (LAB 14). Sub...Continue Reading

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Citations

Sep 17, 2013·Biological Trace Element Research·Simone PienizAdriano Brandelli
Jul 16, 2014·Biological Trace Element Research·Kamna SainiBharat Bhushan
Dec 20, 2014·Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)·Tünde PusztahelyiJózsef Prokisch
Dec 18, 2015·Brazilian Journal of Biology = Revista Brasleira De Biologia·S PienizA Brandelli
Nov 14, 2018·Antonie van Leeuwenhoek·Medhat RehanLouis S Tisa
Oct 15, 2018·Journal of Dairy Science·Ana Paula MörschbächerLucélia Hoehne

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