Determination of the fungal community of pit mud in fermentation cellars for Chinese strong-flavor liquor, using DGGE and Illumina MiSeq sequencing

被引:58
作者
Liu, Maoke [1 ,2 ]
Tang, Yuming [2 ]
Zhao, Ke [1 ]
Liu, Ying [2 ]
Guo, Xiaojiao [2 ]
Ren, Daoqun [2 ]
Yao, Wanchun [2 ]
Tian, Xinhui [2 ]
Gu, Yunfu [1 ]
Yi, Bin [3 ]
Zhang, Xiaoping [1 ]
机构
[1] Sichuan Agr Univ, Coll Resource, Wenjiang 611130, Peoples R China
[2] Sichuan Acad Agr Sci, Inst Rice & Sorghum Sci, Deyang 618000, Peoples R China
[3] Luzhou Laojiao Co Ltd, Ctr Natl Engn Res Solid State Brewing, Luzhou 646100, Peoples R China
关键词
Strong-flavor liquor; Pit mud; ITS region; DGGE; Illumina MiSeq sequencing; MICROBIAL COMMUNITY; FUSARIUM-OXYSPORUM; DIVERSITY; DAQU; IDENTIFICATION; GRADIENT; STARTERS; LIPASE; ACID; PLFA;
D O I
10.1016/j.foodres.2016.11.037
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Chinese strong-flavor liquor (CSFL) is fermented in cellars lined with pit mud (PM). This PM, specific fermented clay, contains microbes that play important roles in CSFL production. However, there is limited information about fungal community structure and cellar-age-related changes in PM. In this study, PM samples were removed from the cellars used for 5 and 100 years and characterized using denaturing gradient gel electrophoresis (DGGE) and Illumina MiSeq sequencing. Both methods revealed there were no significant differences in fungal species diversity (Shannon index, Chao1, and observed species) between the 5- and 100-year PM samples (p > 0.05), but the communities were more stable in the 100-year PM samples (UPGMA). Illumina MiSeq sequencing allowed identification of 111 fungal genera belonging to 4 phyla (Ascomycota, Zygomycota, Basidiomycota, and Chytridiomycota) in the PM samples, with the predominant phylum being Ascomycota. The results also indicated that the compositions of dominant genera in the PM samples were significantly changed during long-term CSFL fermentation. There were relatively more Rhizopus, Phoma, and Trichosporon in the 5-year PM samples, and Aspergillus and Candida were most highly represented in the 100-year PM samples (p < 0.05). Of these, Candida increased its relative abundance significantly in the 100-year samples (p < 0.05). Overall, the results provide novel insights into the fungal community associated with CSFL production, and may suggest why fermentation in a cellar with PM that has been in usage for a longer time allows better quality CSFL production. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:80 / 87
页数:8
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