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Applied Microbiology and Biotechnology

, Volume 41, Issue 4, pp 456–460 | Cite as

The sourdough microflora. Interactions between lactic acid bacteria and yeasts: metabolism of carbohydrates

  • M. Gobbetti
  • A. Corsetti
  • J. Rossi
Applied Microbial and Cell Physiology Original Paper

Abstract

Interactions betweenLactobacillus brevis subsp.lindneri CB1,L. plantarum DC400,Saccharomyces cerevisiae 141 andS.exiguus M14 from sourdoughs were studied in a co-culture model system using a synthetic medium. The lack of competition for maltose whenS.exiguus M14 was present in co-culture with each of the lactic acid bacteria (LAB) enhanced the bacterial cell yield and lactic and acetic acid production.L.brevis subsp.lindneri CB1 resting cells hydrolysed maltose and accumulated glucose in the medium, allowing the growth of maltose negative yeast.S.cerevisiae 141 competed greatly with each of the LAB for glucose and only withL.plantarum DC400 for fructose, causing a decrease in the bacterial cell number and in acid production. As a result of the glucose and fructose availability after the invertase activity of both yeasts,L.plantarum DC400 grew optimally in the presence of sucrose as a carbon source. All of the interactions indicated were confirmed by studying the behaviour of the co-cultures in wheat flour hydrolysate.

Keywords

Glucose Lactic Acid Fructose Bacterial Cell Saccharomyces Cerevisiae 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • M. Gobbetti
    • 1
  • A. Corsetti
    • 1
  • J. Rossi
    • 1
  1. 1.Institute of Dairy MicrobiologyFaculty of AgriculturePerugiaItaly

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