| Growth, lipid accumulation, and fatty acid composition in obligate psychrophilic, facultative psychrophilic, and mesophilic yeasts. | |
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MedLine Citation:
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PMID: 19624740 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Obligate psychrophilic, facultative psychrophilic, and mesophilic yeasts were cultured in a carbon-rich medium at different temperatures to investigate whether growth parameters, lipid accumulation, and fatty acid (FA) composition were adaptive and/or acclimatory responses. Acclimation of facultative psychrophiles and mesophiles to a lower temperature decreased their specific growth rate, but did not affect their biomass yield (Y(X/S)). Obligate and facultative psychrophiles exhibited the highest Y(X/S). Acclimation to lower temperature decreased the lipid yield (Y(L/X)) in mesophilic yeasts, but did not affect Y(L/X) in facultative psychrophilic ones. Similar Y(L/X) were found in both groups of psychrophiles, suggesting that lipid accumulation is not a distinctive characteristic of adaptation to permanently cold environments. The unsaturation of FAs was one major adaptive feature of the yeasts colonizing permanently cold ecosystems. Remarkable amounts of alpha-linolenic acid were found in obligate psychrophiles at the expense of linoleic acid, whereas it was scarce or absent in all the other strains. Increased unsaturation of FAs was also a general acclimatory response of facultative psychrophiles to a lower temperature. These results improve the knowledge of the responses enabling psychrophilic yeasts to cope with the cold and may be of support for potential biotechnological exploitation of these strains. |
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Authors:
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Maddalena Rossi; Pietro Buzzini; Lisa Cordisco; Alberto Amaretti; Maurizio Sala; Stefano Raimondi; Chiara Ponzoni; Ugo Maria Pagnoni; Diego Matteuzzi |
Publication Detail:
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Type: Journal Article Date: 2009-06-22 |
Journal Detail:
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Title: FEMS microbiology ecology Volume: 69 ISSN: 1574-6941 ISO Abbreviation: FEMS Microbiol. Ecol. Publication Date: 2009 Sep |
Date Detail:
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Created Date: 2009-08-18 Completed Date: 2009-09-28 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8901229 Medline TA: FEMS Microbiol Ecol Country: England |
Other Details:
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Languages: eng Pagination: 363-72 Citation Subset: IM |
Affiliation:
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Department of Chemistry, University of Modena and Reggio Emilia, 41100 Modena, Italy, rossi.maddalena@unimore.it |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acclimatization Cold Temperature Fatty Acids / biosynthesis* Lipid Metabolism* Yeasts / growth & development*, metabolism* alpha-Linolenic Acid / biosynthesis |
| Chemical | |
Reg. No./Substance:
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0/Fatty Acids; 463-40-1/alpha-Linolenic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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