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Identification of Antifungal Substances of Lactobacillus sakei subsp. ALI033 and Antifungal Activity against Penicillium brevicompactum Strain FI02

  • Huh, Chang Ki (Imsil Research Institute of Cheese Science) ;
  • Hwang, Tae Yean (Department of Food Science and Technology, Sunchon National University)
  • Received : 2015.10.23
  • Accepted : 2016.02.03
  • Published : 2016.03.31

Abstract

This study was performed to investigate the antifungal substances and the antifungal activity against fungi of lactic acid bacteria (LAB) isolated from kimchi. LAB from kimchi in Imsil showed antifungal activity against Penicillium brevicompactum strain FI02. LAB LI031 was identified as Lactobacillus sakei subsp. Antifungal substances contained in L. sakei subsp. ALI033 culture media were unstable at high pH levels. Both, the control and proteinase K and protease treated samples showed clear zones, suggesting that the antifungal substances produced by ALI033 were non-protein substances unaffected by protesases. Both, the control and catalase showed clear zones, suggesting that the antifungal metabolite was not $H_2O_2$. The molecular weights of the antifungal substances were ${\leq}3,000Da$. The organic acid content of crude antifungal substances produced by L. sakei subsp. ALI033 showed high concentrations of lactic acid (502.47 mg/100 g). Therefore, these results suggest that antifungal substance produced by L. sakei subsp. ALI033 is most likely due to its ability in producing organic acid.

Acknowledgement

Supported by : Ministry of Agriculture, Food and Rural Affairs

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