Effect of oxygen levels on the fatty acids and lipids of Mucor rouxii

S. Safe, J. Duncan

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

The effect of aerobic and oxygen limiting (anaerobic) growth conditions upon the fatty acid and lipid composition of Mucor rouxii has been examined. The aerobic cells contained a range of fatty acids typical of phycomycetes, i.e. γ-linolenic acid, with an unsaturation index of 1.20, whereas the anerobic cells contained relatively high levels of shorter chained fatty acids and very low concentrations of unsaturated acids (unsaturation index=0.025). The unsaturated compounds were monoolefinic tetra-, hexa-, and octadecenoic acids; and closer examination of their di-trimethylsilyl derivatives by gas chromatography and mass spectrometry showed that all three acids contained the double bond in the Δ9 position. These results were consistent with a microaerobic biosynthetic pathway. In addition, there were major quantitative differences in the lipid composition of the two types of cells; and it was evident that the differences in growth environment markedly affected the cellular lipid and fatty acid compositions.

Original languageEnglish (US)
Pages (from-to)285-289
Number of pages5
JournalLipids
Volume9
Issue number4
DOIs
StatePublished - Apr 1974

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry
  • Cell Biology

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