食品科学 ›› 2022, Vol. 43 ›› Issue (18): 134-142.doi: 10.7506/spkx1002-6630-20211025-263

• 生物工程 • 上一篇    

不同乳酸菌发酵对甘薯淀粉加工浆液营养功能成分及感官特性的影响

曹晶晶,木泰华,马梦梅   

  1. (1.新疆农业大学食品科学与药学学院,新疆 乌鲁木齐 830052;2.中国农业科学院农产品加工研究所,农业农村部农产品加工综合性重点实验室,北京 100193)
  • 发布日期:2022-09-28
  • 基金资助:
    国家甘薯产业技术体系资助项目(CARS-10);国家重点研发计划-政府间国际科技创新合作重点专项(2016YFE0133600)

Effect of Fermentation with Different Lactic Acid Bacteria Starter Cultures on Nutritional and Functional Components and Sensory Characteristics of Sweet Potato Slurry for Starch Production

CAO Jingjing, MU Taihua, MA Mengmei   

  1. (1. College of Food Science and Pharmacy, Xinjiang Agricultural University, ürümqi 830052, China; 2. Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs,Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China)
  • Published:2022-09-28

摘要: 选用植物乳杆菌(Lactobacillus plantarum,Lp)、保加利亚乳杆菌(Lactobacillus bulgaricus,Lb)、嗜热链球菌(Streptococcus thermophilus,St)、戊糖片球菌(Pediococcus pentosus,Pp)、干酪乳杆菌(Lactobacillus casei,Lc)及商业Lp(SZ)分别对甘薯淀粉加工浆液进行发酵,比较不同乳酸菌发酵对甘薯淀粉加工浆液营养功能成分(蛋白质、灰分、可溶性膳食纤维、不溶性膳食纤维、总膳食纤维、总酸、总糖、乳酸、短链脂肪酸、总酚、游离氨基酸)及感官特性(电子鼻、电子舌、气相色谱-质谱、感官评价)的影响。结果表明:6 种乳酸菌发酵后,浆液中蛋白质、糖类、可溶性膳食纤维、不溶性膳食纤维及总膳食纤维含量显著下降;不同乳酸菌均表现出良好的发酵性能,发酵后浆液pH值从6.62下降到3.67~3.88,总酸质量浓度由0.29 g/100 mL提高至2.69~3.67 g/100 mL,且乳酸及短链脂肪酸含量显著上升;Lb和Lc发酵显著提高了浆液中总酚含量,分别提升了18.44%和17.78%;在发酵液中共检出16 种游离氨基酸,其中必需游离氨基酸含量显著上升;气相色谱-质谱结果表明,乳酸菌发酵可有效提升甘薯淀粉加工浆液中风味物质的种类和含量,改善其风味和口感,其中Pp、St和SZ发酵浆液的总体感官品质最好。上述研究结果可为乳酸菌发酵应用于甘薯淀粉加工浆液制备饮料的研发奠定理论支撑。

关键词: 甘薯淀粉加工浆液;乳酸菌;营养功能成分;感官特性

Abstract: In this study, sweet potato slurry that can be used for starch production was fermented using Lactobacillus plantarum (Lp), Lactobacillus bulgaricus (Lb), Streptococcus thermophilus (St), Pediococcus pentosus (Pp), Lactobacillus casei (Lc) and commercial Lp (SZ), separately, and the effects of different lactic acid bacteria (LAB) starter cultures on the nutritional and functional components (protein, ash, soluble dietary fiber, insoluble dietary fiber, total dietary fiber, total acid, total sugar, lactic acid, short chain fatty acid, total polyphenol, and free amino acid) and sensory characteristics (evaluated by electronic nose, electronic tongue, gas chromatography-mass spectrometry (GC-MS), and sensory evaluation) of sweet potato slurry were compared. The results showed that after fermentation, the contents of protein, sugar, soluble dietary fiber, insoluble dietary fiber and total dietary fiber decreased significantly. All starter cultures showed excellent fermentation performance. After fermentation, the pH of the slurry decreased from 6.62 to 3.67–3.88, the total acid content increased from 0.29 to 2.69–3.67 g/100 mL, and the contents of lactic acid and short chain fatty acids increased significantly. Lb and Lc fermentation significantly increased the content of total polyphenols in the slurry by 18.44% and 17.78%, respectively. Additionally, 16 free amino acids were detected in the fermented slurry, and the content of essential free amino acids increased significantly compared to that in the unfermented slurry. The GC-MS profile showed that lactic acid bacteria fermentation remarkably increased the number and amount of flavor substances in the slurry and improved its flavor and mouthfeel. The slurry fermented by Pp, St and SZ exhibited better overall sensory acceptability than that fermented by the other starter cultures. In conclusion, these findings can provide theoretical support for the research and development of LAB-fermented beverage from sweet potato starch slurry.

Key words: sweet potato starch slurry; Lactobacillus; nutritional and functional components; sensory characteristics

中图分类号: