title: Non-Conventional Yeast Strains Increase the Aroma Complexity of Bread.
abstract: Saccharomyces cerevisiae is routinely used yeast in food fermentations because it combines several key traits, including fermentation efficiency and production of desirable flavors. However, the dominance of S. cerevisiae in industrial fermentations limits the diversity in the aroma profiles of the end products. Hence, there is a growing interest in non-conventional yeast strains that can help generate the diversity and complexity desired in today's diversified and consumer-driven markets. Here, we selected a set of non-conventional yeast strains to examine their potential for bread fermentation. Here, we tested ten non-conventional yeasts for bread fermentation, including two Saccharomyces species that are not currently used in bread making and 8 non-Saccharomyces strains. The results show that Torulaspora delbrueckii and Saccharomyces bayanus combine satisfactory dough fermentation with an interesting flavor profile. Sensory analysis and HS-SPME-GC-MS analysis confirmed that these strains produce aroma profiles that are very different from that produced by a commercial bakery strain. Moreover, bread produced with these yeasts was preferred by a majority of a trained sensory panel. These results demonstrate the potential of T. delbrueckii and S. bayanus as alternative yeasts for bread dough leavening, and provide a general experimental framework for the evaluation of more yeasts and bacteria.
authors: Systems Biology Laboratory, VIB Center for Microbiology, Leuven, Belgium.|CMPG Laboratory of Genetics and Genomics, KU Leuven, Leuven, Belgium.
authors: Elham
authors: E
authors: Aslankoohi
authors: Systems Biology Laboratory, VIB Center for Microbiology, Leuven, Belgium.|CMPG Laboratory of Genetics and Genomics, KU Leuven, Leuven, Belgium.
authors: Beatriz
authors: http://orcid.org/0000-0002-7147-5084
authors: B
authors: Herrera-Malaver
authors: Laboratory of Food Chemistry and Biochemistry & Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Leuven, Belgium.
authors: Mohammad Naser
authors: MN
authors: Rezaei
authors: Systems Biology Laboratory, VIB Center for Microbiology, Leuven, Belgium.|CMPG Laboratory of Genetics and Genomics, KU Leuven, Leuven, Belgium.
authors: Jan
authors: J
authors: Steensels
authors: Laboratory of Food Chemistry and Biochemistry & Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Leuven, Belgium.
authors: Christophe M
authors: CM
authors: Courtin
authors: Systems Biology Laboratory, VIB Center for Microbiology, Leuven, Belgium.|CMPG Laboratory of Genetics and Genomics, KU Leuven, Leuven, Belgium.
authors: Kevin J
authors: KJ
authors: Verstrepen
mesh_terms: D001939:Bread; D005285:Fermentation; D008401:Gas Chromatography-Mass Spectrometry; D009812:Odorants; D052617:Solid Phase Microextraction; D013045:Species Specificity; D015003:Yeasts / Q000145:classification / Q000502:physiology*