影响鲜湿米粉食味品质微生物的分离与鉴定
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(1. 长沙理工大学化学与生物工程学院,湖南 长沙 410114;2. 中国农业科学院农产品加工研究所,北京 100193)

作者简介:

陈兰煊,女,长沙理工大学在读硕士研究生。

通讯作者:

易翠平(1973—),女,长沙理工大学教授,博士。E-mail:yicp963@163.com

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公益性行业(农业)科研专项(编号:201303070);国家自然科学基金(编号:31771899);长沙市科技计划项目(编号:kh1703134)


Isolation and identification of microorganism affecting eating-quality in fermented fresh rice noodle
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(1. School of Chemistry and Biology Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, China; 2. Institute of Agro-products Processing Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

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    摘要:

    从鲜湿米粉发酵液中分离并鉴定影响其食味品质的微生物菌株,以制备发酵剂推进米粉生产的工业化进程。首先从传统米粉发酵液中,分离得41株酵母菌和60株乳酸菌(LAB),并对其胞外酶活性(过氧化氢酶、β-葡萄糖苷酶、脂肪酶、α-淀粉酶、蛋白水解酶)、不同pH值和温度下的生长和酸化能力等技术特征进行分析,共筛选出11株酵母菌株和 19株乳酸菌。然后通过对酵母菌的内转录间隔区序列和乳酸菌的16S rRNA基因鉴定,经基因型和系统发育树分析表明:3株酵母菌和4株乳酸菌。采用这7株菌对大米进行控制发酵制备鲜湿米粉,结果表明,乳酸菌中L. plantarum CSL 23 发酵制备的米粉拉伸强度、硬度、内聚性和吸水率最高,黏附性和蒸煮损失最低;酵母中S. cerevisiae CSY 13发酵的米粉品质更好。因此,2株菌具有用来制备鲜湿米粉专用发酵剂的潜力,为规模化控制发酵生产鲜湿米粉提供试验依据。

    Abstract:

    Microorganism strains as the starter culture for the manufacture of fermented rice noodles were selected. A total of 41 yeasts and 60 lactic acid bacteria (LAB) were isolated from the traditional fermentation of rice noodles, and the enzymatic activities (catalase, β-glucosidase, lipase, α-amylase, proteolytic enzyme), growth under varied pH and temperatures, and acidification capability were characterized. Principal component analysis indicated that 11 isolates of yeast, and 19 isolates of LAB exhibited potential technological traits. After identification using internal transcribed spacer sequence for yeasts and 16S rRNA gene for LAB, the isolates were grouped into three yeast isolates and four LAB isolates by their genotypes and phylogenetic trees. Noodles fermented by a LAB isolate from the Lactobacillus plantarum group (CSL 23) led to higher tensile strength, hardness, cohesiveness and cooked weight, and lower adhesiveness and cooking loss, than that by the other LAB isolates. Noodles fermented by a yeast isolate from the Saccharomyces cerevisiae group (CSY 13) were of better qualities than that by the other yeast isolates. Thus, these two isolates were the potential starter cultures for preparing rice noodles. The results would provide a guidance for maintaining consistent quality during large-scale production of fermented rice noodles.

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引用本文

陈兰煊,杨有望,周慧,等.影响鲜湿米粉食味品质微生物的分离与鉴定[J].食品与机械,2018,34(1):33-43.
CHENLanxuan, YANGYouwang, ZHOUHui, et al. Isolation and identification of microorganism affecting eating-quality in fermented fresh rice noodle[J]. Food & Machinery,2018,34(1):33-43.

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  • 收稿日期:2017-04-13
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  • 在线发布日期: 2023-03-17
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