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Heat adaptation improves viability of Lactococcus lactis subsp. lactis HE-1 after heat stress

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Abstract

We have studied the potential of environmental adaptation as a survival mechanism to enable lactic acid bacteria to withstand spray drying. The formulation process of these bacteria exposes them to stresses such as heating and dehydration on daily basis. In the present study, the effect of heat adaptation on subsequent exposure of Lactobacillus lactis subsp. lactis HE-1 cells to various types of lethal stress was examined by comparing the viability of heat-adapted cells with nonadapted ones. The responses of heat-adapted cells to other environmental stresses such as H2O2, heat, acid, and ethanol were also examined. The results showed that heat-adapted cells had a higher survival rate than the non-adapted cells. Morphological analysis was performed to explain the observed differences. The adaptation mechanisms in response to stresses in L. lactis subsp. lactis HE-1 are to be fundamental for survival during spray drying process.

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Authors and Affiliations

  1. Department of Biological Engineering, Inha University, Incheon, 22212, Korea

    Chang-Ho Kang, Haneul Jeon, YuJin Shin & Jae-Seong So

  2. Department of Organic and Nano System Engineering, Konkuk University, Seoul, 05029, Korea

    Yoon-Jung Kwon

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  1. Chang-Ho Kang
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  2. Haneul Jeon
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  3. YuJin Shin
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Correspondence to Jae-Seong So.

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Kang, CH., Jeon, H., Shin, Y. et al. Heat adaptation improves viability of Lactococcus lactis subsp. lactis HE-1 after heat stress. Food Sci Biotechnol 24, 1823–1827 (2015). https://doi.org/10.1007/s10068-015-0238-1

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  • DOI: https://doi.org/10.1007/s10068-015-0238-1

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