Journal
FOOD SCIENCE AND HUMAN WELLNESS
Volume 10, Issue 2, Pages 231-240Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.fshw.2021.02.013
Keywords
Yeast; Nanx Wudl; Fermented sausage; Aroma; Saccharomyces cerevisiae
Categories
Funding
- National Key R&D Program of China [2018YFD0400404]
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Yeasts are important in fermented meats, and a study on Chinese Dong fermented pork identified various yeast species with different technological properties. Specific yeast strains showed lipolytic and proteolytic activities, with Saccharomyces cerevisiae demonstrating meat protein hydrolysis. Inoculation of selected yeast strains enhanced volatile production in simulated fermented sausage conditions, suggesting potential as aroma enhancers.
Yeasts are one of the predominant microbial groups in fermented meats. In this study, yeast communities of Chinese Dong fermented pork (Nanx Wudl) were investigated and the technological properties of 73 yeast isolates were evaluated. Through culture-dependent and high-throughput sequencing methods, the main yeast species identified included Pichia membranifaciens, Kazachstania bulderi, Millerozyma farinosa, Candida zeylanoides, Kazachstania exigua, Candida parapsilosis and Saccharomyces cerevisiae. Among these yeasts, P. membranifaciens, M. farinosa, K. exigua and K. bulderi were detected in fermented meats for the first time. A total of 73 yeast isolates was investigated for their lipolytic and proteolytic activities. All yeast species showed lipolytic activity, while proteolytic activity against meat protein was only detected in S. cerevisiae. Assay of aroma-producing potential was performed in a model simulating fermented sausage condition. Inoculation of yeast strains increased volatiles production, especially esters and alcohols. The highest ester production was observed in S. cerevisiae Y70 strain, followed by K. exigua Y12 and K. bulderi Y19. C. zeylanoides Y10 and S. cerevisiae Y70 were the highest producers of benzeneethanol and 3-methyl-1butanol. S. cerevisiae Y70 with its highest production of branched alcohols and esters could be a promising candidate as aroma enhancer in the manufacture of fermented sausages. (C) 2021 Beijing Academy of Food Sciences. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
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