Correlation analysis of bacterial communities and volatile compounds in Pixian soybean paste during fermentation processes

  • XU Wei-zhen ,
  • ZHAO Hong-yu ,
  • YANG Yi ,
  • YE Yu-jiao ,
  • YUE Ping ,
  • ZHANG Liang
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  • 1(Key Lab of Food Biotechnology of Sichuan Province, College of Bioengineering, Xihua University, Chengdu 610039, China)
    2(Sichuan Dandan Pixian Soybean Paste Co. Ltd., National Enterprise Technology Center, Soybean Paste Brewing Technology and Engineering Laboratory of Sichuan Province, National & Local Joint Engineering Research Center of Food Enzyme Fermentation, Chengdu 611732, China)

Received date: 2017-09-08

  Online published: 2018-10-30

Abstract

Pixian soybean paste is a traditional fermented soybean food product that has been consumed for centuries as a protein source and flavoring ingredient in South-China, especially in areas along middle and upper reaches of the Yangtze River. To analyze the relationships between volatile compounds and core bacterial communities in Pixian soybean paste during fermentation processes, high-throughput sequencing method and HS-SPME-GC-MS were used. The results from Partial least squares regression (PLSR) and Pearson′s correlation coefficients (PCC) analyses revealed highly covariable relationships between volatile compounds and bacterial taxa. Notably, Staphylococcus showed significant correlation with ethyl isovalerate (PCC, 0.901) and extremely significant correlation with ethyl dodecanoate (0.977). Bacillus showed a significant negative correlation with linalool (-0.911). Staphylococcus and Bacilluscould were preliminarily identified as important bacteria that affected the volatile compounds during post-fermentation period of PDB.

Cite this article

XU Wei-zhen , ZHAO Hong-yu , YANG Yi , YE Yu-jiao , YUE Ping , ZHANG Liang . Correlation analysis of bacterial communities and volatile compounds in Pixian soybean paste during fermentation processes[J]. Food and Fermentation Industries, 2018 , 44(9) : 22 -28 . DOI: 10.13995/j.cnki.11-1802/ts.015698

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