Isolation of a thermophilic and halophilic tyrosol-degrading Geobacillus from a Tunisian high-temperature oil field

FEMS Microbiology Letters
Mohamed ChamkhaSami Sayadi

Abstract

An aerobic, thermophilic, halotolerant and Gram-positive bacterium, designated strain C5, was isolated from a high-temperature oil field, located in Sfax, Tunisia, after enrichment on tyrosol. Strain C5 grew between 25 and 70 degrees C and optimally at 50 degrees C. It grew in the presence of 0-12% (w/v) NaCl, with optimum growth at 3% (w/v) NaCl. Strain C5 was able to degrade tyrosol aerobically, in the presence of 30 g L(-1) NaCl and under warm conditions (55 degrees C). The degradation of tyrosol proceeded via p-hydroxyphenylacetic and 3,4-dihydroxyphenylacetic acids. The products were confirmed by HPLC and GC-MS analyses. Strain C5 was also found to degrde a wide range of other aromatic compounds, including benzoic, p-hydroxybenzoic, protocatechuic, vanillic, p-hydroxyphenylacetic, 3,4-dihydroxyphenylacetic, cinnamic and ferulic acids, phenol and m-cresol. Moreover, strain C5 was grown on diesel and crude oil as sole carbon and energy sources. Strain C5 was also able to utilize several carbohydrates. Phenotypic characteristics and phylogenetic analysis of the 16S rRNA gene sequence of strain C5 revealed that it was related to members of the genus Geobacillus, being most closely related to the type strain of G. pallidus (99%...Continue Reading

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Citations

Dec 15, 2010·Applied Microbiology and Biotechnology·Seyed Mohammad Mehdi DastgheibAntonio Ventosa
Mar 7, 2013·Canadian Journal of Microbiology·Ranya A Al-KhalafMohammad Afzal
Dec 8, 2009·International Journal of Food Sciences and Nutrition·Safa Al-TamimiMohammad Afzal
Oct 24, 2009·Journal of Microbiological Methods·Ahmet AdiguzelFikrettin Sahin
Jun 11, 2016·Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology]·Bruna Martins DellagnezzeValéria Maia de Oliveira
Jun 28, 2016·World Journal of Microbiology & Biotechnology·Mohamed Faraj EdbeibFahrul Huyop
Jan 18, 2017·Archives of Microbiology·Preeti Ranawat, Seema Rawat
Oct 13, 2018·Applied Microbiology and Biotechnology·Hirokazu Suzuki
Nov 3, 2020·The Science of the Total Environment·Charbel Abou KhalilMichel C Boufadel
May 1, 2021·Journal of Industrial Microbiology & Biotechnology·Thomas MainkaStefan Pflügl

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