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http://dx.doi.org/10.9721/KJFST.2014.46.2.148

Characterization of Mutant Strain, Lactobacillus paracasei ML-7 Isolated from Kimchi, and Its Effect on the Growth of Broiler  

Park, Keun-Tae (Research and Development Center, Milae Resources ML Co. Ltd.)
Oh, Mihyang (Research and Development Center, Milae Resources ML Co. Ltd.)
Nam, Jungok (Research and Development Center, Milae Resources ML Co. Ltd.)
Ji, Kibbeum (Research and Development Center, Milae Resources ML Co. Ltd.)
Han, Jong-Kwon (Research and Development Center, Milae Resources ML Co. Ltd.)
Publication Information
Korean Journal of Food Science and Technology / v.46, no.2, 2014 , pp. 148-152 More about this Journal
Abstract
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-2 parent strain. Broiler chickens were randomly fed with one of three experimental diets: a basal diet as a control, and basal diets supplemented with 0.3% of the L. paracasei LS-2 and L. paracasei ML-7 strains. When concluding the study, the final body weights of the broilers fed with the supplemented basal diets were found to be significantly higher (1.9% for LS-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 with or without the parent L. paracasei LS-2 strain.
Keywords
Lactobacillus paracaei; ultraviolet mutation; organic acid; broiler;
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