title: Isolation and identification of lactic acid bacteria from Tarag in Eastern Inner Mongolia of China by 16S rRNA sequences and DGGE analysis.
abstract: Tarag is a characteristic fermented dairy product with rich microflora (especially lactic acid bacteria), developed by the people of Mongolian nationality in Inner Mongolia of China and Mongolia throughout history. One hundred and ninety-eight samples of Tarag were collected from scattered households in Eastern Inner Mongolia, and total of 790 isolates of lactic acid bacteria (LAB) were isolated by traditional pure culture method. To identify these isolates and analyze their biodiversity, 16S rRNA gene sequences analysis and PCR-DGGE were performed respectively. The results showed that 790 isolates could be classified as 31 species and subspecies. Among these isolates, Lactobacillus helveticus (153 strains, about 19.4%), Lactococcus lactis subsp. lactis (132 strains, about 16.7%) and Lactobacillus casei (106 strains, about 11.0%) were considered as the predominated species in the traditional fermented dairy products (Tarag) in Eastern Inner Mongolia. It was shown that the biodiversity of LAB in Tarag in Inner Mongolia was very abundant, and this traditional fermented dairy product could be considered as valuable resources for LAB isolation and probiotic selection.
authors.affiliation: Key Laboratory of Dairy Biotechnology and Engineering (Inner Mongolia Agricultral University), Ministry of Education, PR China. wjliu168@163.com
authors.forename: Wenjun
authors.initials: W
authors.lastname: Liu
authors.forename: Qiuhua
authors.initials: Q
authors.lastname: Bao
authors.lastname: Jirimutu
authors.forename: Manjun
authors.initials: M
authors.lastname: Qing
authors.lastname: Siriguleng
authors.forename: Xia
authors.initials: X
authors.lastname: Chen
authors.forename: Ting
authors.initials: T
authors.lastname: Sun
authors.forename: Meihua
authors.initials: M
authors.lastname: Li
authors.forename: Jiachao
authors.initials: J
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Yu
authors.forename: Menghe
authors.initials: M
authors.lastname: Bilige
authors.forename: Tiansong
authors.initials: T
authors.lastname: Sun
authors.forename: Heping
authors.initials: H
authors.lastname: Zhang
mesh_terms: D002681:China; D016000:Cluster Analysis; D016172:DNA Fingerprinting; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D058645:Denaturing Gradient Gel Electrophoresis; D005516:Food Microbiology; D006801:Humans; D056546:Lactobacillales / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S