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KMID : 0545119960060040255
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Journal of Microbiology and Biotechnology
1996 Volume.6 No. 4 p.255 ~ p.259
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Growth and β-Glucosidase Activity of Bifidobacterium
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CHOI, YUN-JUNG
KIM, CHUL-JAI/PARK, SO-YOUNG/KO, YOUNG-TAE/JEONG, HOO-KIL/JI, GEUN-EOG
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Abstract
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β-Glucosidase was known to be involved in the mutagenic activation of β-glucosidase. The level of β-glucosidase in the feces of adults was 2.7 times higher than that of infants. There was no difference in the percentage of β-glucosidase positive strains among Bifidobacterium isolates between adults and infants, corresponding to 90 and 92%, respectively. However, the strains from adults showed 1.9 times higher enzyme activity than from infants when grown in Brain Heart Infusion medium. β-Glucosidase negative strains could not ferment β-glucosidase substrates, such as cellobiose, salicine, naringin, esculin and arbutin. Presence of β-glucosidase in Bifidobacterium did not alter the degree of growth in reconstituted skim milk. The β-glucosidase level was much lower in milk and vegetable medium, although cells grew above 10^8 cfu/ml, than in BHI medium. This study suggests that metabolic activation of the β-glucosidase by Bifidobacterium β-glucosidase various significantly depending on types of growth medium.
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