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Preparation of a novel biofilm directed vat set (DVS) starter and its preliminary application in pickled radish

文献类型： 外文期刊

作者： Shu, Yue 1 ; Yang, Shuhui 1 ; Deng, Chunhui 1 ; Lin, Xia 1 ; Kong, Hong 1 ; Song, Yunlong 1 ; Liang, Ziwei 1 ; Tang, Jie 1 ; Liu, Lei 2 ; Xiong, Hua 1 ; Rao, Yu 1 ;

作者机构： 1.Xihua Univ, Sch Food Sci & Bioengn, Food Microbiol Key Lab Sichuan Prov, Chengdu 610039, Peoples R China

2.Lanzhou Univ, Lab Anim Dis Control & Prevent, Coll Vet Med, Lanzhou Vet Res Inst,Chinese Acad Agr Sci, Lanzhou 730000, Peoples R China

关键词： Biofilm; Calcium pectin beads; DVS starter; Vegetable fermentation; High density

期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：6.6； 五年影响因子：6.9 ）

ISSN： 0023-6438

年卷期： 2025 年 224 卷

页码：

收录情况： SCI

摘要： Fermentation is commonly used for preservation and processing to effectively extend the shelf life of vegetables. However, traditional pickled vegetable fermentation processes present challenges, such as bacterial interference and notable quality variations, which can be effectively addressed by the utilization of fermenting agents. This study embedded Lactiplantibacillus plantarum LR-31 with low methoxyl pectin, followed by culturing in MRS broth to prepare a biofilm directed vat set (DVS) starter. The biofilm DVS starter presented as small round calcium pectinate beads (CPB) of 2.02 +/- 0.07 mm, with an effective viable bacterial count of up to 11.9 log CFU/ g. After freeze-drying, the survival rate of the bacterial cells in the LR-31 biofilm CPB DVS starter reached approximately 70 %, which was significantly higher than that of the unencapsulated planktonic DVS starter. This indicated that encapsulation notably increased the freeze-dried survival rate of the microbial DVS. Furthermore, compared with the commercial fermentation DVS starter, the LR-31 biofilm CPB DVS starter effectively reduced the nitrite content in the fermentation system. Using the LR-31 biofilm CPB DVS starter for ferment radishes significantly enhanced their elasticity, cohesion, and sensory evaluation scores. This study established a theoretical foundation for using high-density biofilm DVS starters in vegetable fermentation.

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