Production of dextran by Lactobacillus fermentum OR1 isolated from pickle mango juice

[摘要] Dextran is an exopolysaccharide produces from bacteria that have been shown to be useful in the pharmaceutical and food industries. The goal of this study was to screen bacteria capable of producing dextran from Thai fermented foods and then maximize dextran production. The maximal amount of dextran produced byLactobacillus fermentumOR1 isolated from pickled mango juice is 65 g/L after 20 h of incubation at 30°C and 200 rpm in DMB2 Medium containing 160 g/L sucrose. Dextran's morphology, chemical structure, and thermal stability were further characterized using SEM and FTIR. The results suggest thatLactobacillus fermentumOR1 might be widely used in the production of linear dextran which has the potential to be used as a natural agent in food and other industries.

[学科分类] 材料科学（综合）