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02 July 2009
Article (Scientific journals)
Production of γ-Decalactone by a Psychrophilic and a Mesophilic Strain of the Yeast
Alchihab, Mohamed; Destain, Jacqueline; Aguedo, Mario et al.
2009 • In Applied Biochemistry and Biotechnology, 158
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Keywords :
Psychrophilic; γ-Decalactone; Castor oil; Mesophilic; Rhodotorula aurantiaca
Abstract :
[en] Among 18 psychrophilic strains isolated near the Antarctic Station, the psychrophilic <br />strain Rhodotorula aurantiaca A19 was selected for its ability of growth and γ- <br />decalactone production at low temperatures. The effects of temperature, initial pH, and castor <br />oil concentration on the growth and γ-decalactone production by a psychrophilic and a <br />mesophilic strain of R. aurantiaca were investigated. The highest γ-decalactone production <br />in flasks (5.8 g/l) was obtained with the strain A19 at 14 °C and initial pH 7.0 in medium <br />containing 20 g/l castor oil. On the other hand, these factors did not affect the production of <br />γ-decalactone by the mesophilic strain. In fermentor, a γ-decalactone concentration of 6.6 g/l <br />was reached with the strain A19, whereas a maximum of 0.1 g/l was obtained with the <br />mesophilic strain. Our results suggest that the ability to synthesize γ-decalactone is a <br />particularity of the strain A19, since the mesophilic strain (no. 30645) produced small amounts, <br />and the other (no. 31354) did not exhibit this property. It is, to our knowledge, the first report of γ-decalactone production by R. aurantiaca and furthermore by a psychrophilic yeast strain. <br />Moreover, the amount of γ-decalactone obtained in fermentor with the strain 19 was on the <br />order of concentrations usually described in patents.
Disciplines :
Microbiology
Biotechnology
Author, co-author :
Alchihab, Mohamed ;  Université de Liège - ULiège > Doct. sc. agro. & ingé. biol.
Destain, Jacqueline ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Aguedo, Mario ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Majad, Lamia
Ghalfi, Hakim
Wathelet, Jean-Paul ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Thonart, Philippe ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech - Biochimie et microbiologie industrielles
Language :
English
Title :
Production of γ-Decalactone by a Psychrophilic and a Mesophilic Strain of the Yeast
Publication date :
2009
Journal title :
Applied Biochemistry and Biotechnology
ISSN :
0273-2289
eISSN :
1559-0291
Publisher :
Humana Press, Totowa, United States - New Jersey
Volume :
158
Peer reviewed :
Peer Reviewed verified by ORBi

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