Physiological Characteristics and Production of Folic Acid of Lactobacillus plantarum JA71 Isolated from Jeotgal, a Traditional Korean Fermented Seafood

Park, Sun-Young; Do, Jeong-Ryong; Kim, Young-Jin; Kim, Kee-Sung; Lim, Sang-Dong

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자료유형: 학술저널

저자정보: Park, Sun-Young (Korea Food Research Institute) Do, Jeong-Ryong (Korea Food Research Institute) Kim, Young-Jin (Korea Food Research Institute) Kim, Kee-Sung (Korea Food Research Institute) Lim, Sang-Dong (Korea Food Research Institute)

저널정보: 한국축산식품학회 한국축산식품학회지 한국축산식품학회지 제34권 제1호

발행연도: 2014.1

수록면: 106 - 114 (9page)

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Folic acid, one of the B group of vitamins, is an essential substance for maintaining the functions of the nervous system, and is also known to decrease the level of homocysteine in plasma. Homocysteine influences the lowering of the cognitive function in humans, and especially in elderly people. In order to determine the strains with a strong capacity to produce folic acid, 190 bacteria were isolated from various kinds of jeotgal and chungkuk-jang. In our test experiment, JA71 was found to contain $9.03{\mu}g/mL$ of folic acid after 24 h of incubation in an MRS broth. This showed that JA71 has the highest folic acid production ability compared to the other lactic acid bacteria that were isolated. JA71 was identified as Lactobacillus plantarum by the result of API carbohydrate fermentation pattern and 16s rDNA sequence. JA71 was investigated for its physiological characteristics. The optimum growth temperature of JA71 was $37^{\circ}C$, and the cultures took 12 h to reach pH 4.4. JA71 proved more sensitive to bacitracin when compared with fifteen different antibiotics, and showed most resistance to neomycin and vancomycin. Moreover, it was comparatively tolerant of bile juice and acid, and displayed resistance to Escherichia coli, Salmonella Typhimurium, and Staphylococcus aureus with restraint rates of 60.4%, 96.7%, and 76.2%, respectively. These results demonstrate that JA71 could be an excellent strain for application to functional products.

#Lactobacillus plantarum #physiological characteristics #folic acid #functional product

참고문헌 (42)

참고문헌 신청

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