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KMID : 0380620140460020148
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Korean Journal of Food Science and Technology
2014 Volume.46 No. 2 p.148 ~ p.152
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Characterization of Mutant Strain, Lactobacillus paracasei ML-7 Isolated from Kimchi, and Its Effect on the Growth of Broiler
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Park Keun-Tae
Oh Mi-Hyang
Nam Jung-ok
Ji Ki-bbeum
Han Jong-Kwon
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Abstract
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A mutant strain of Lactobacillus paracasei (ML-7) was derived by ultraviolet irradiation of the parent L.paracasei LS-2 strain, followed by colony selection on pH 3.5 MRS agar plates, on which L. paracasei LS-2 cannot grow.The L. paracasei ML-7 mutant strain produced an increased amount of organic acids compared to the L. paracasei LS-2parent strain. Broiler chickens were randomly fed with one of three experimental diets: a basal diet as a control, and basaldiets supplemented with 0.3% of the L. paracasei LS-2 and L. paracasei ML-7 strains. When concluding the study, thefinal body weights of the broilers fed with the supplemented basal diets were found to be significantly higher (1.9% forLS-2 and 6.2% for ML-7) than the control broiler group. Broilers fed with basal diet supplemented with the mutant L.paracasei ML-7 strain showed increased body weight and food intake, compared to broilers fed with the basal diet withor without the parent L. paracasei LS-2 strain.
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KEYWORD
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Lactobacillus paracaei, ultraviolet mutation, organic acid, broiler
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