Production of γ-Decalactone by a Psychrophilic and a Mesophilic Strain of the Yeast

Alchihab, Mohamed; Destain, Jacqueline; Aguedo, Mario; Majad, Lamia; Ghalfi, Hakim; Wathelet, Jean-Paul; Thonart, Philippe

doi:10.1007/s12010-008-8297-x

Reference : Production of γ-Decalactone by a Psychrophilic and a Mesophilic Strain of the Yeast


	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Microbiology Life sciences : Biotechnology
	To cite this reference:	http://hdl.handle.net/2268/16017

Title :	Production of γ-Decalactone by a Psychrophilic and a Mesophilic Strain of the Yeast
Language :	English
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 >]
Publication date :	2009
Journal title :	Applied Biochemistry and Biotechnology
Publisher :	Humana Press
Volume :	158
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0273-2289
City :	Totowa
Country :	NJ
Keywords :	[en] 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.
Target :	Researchers ; Students ; Others ; General public ; Professionals
Permalink :	http://hdl.handle.net/2268/16017
	also: http://hdl.handle.net/2268/156543
DOI :	10.1007/s12010-008-8297-x

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