Enhancing acid tolerance of <Emphasis Type="Italic">Leuconostoc mesenteroides</Emphasis> with glutathione |
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Authors: | Ji Eun Kim Hyun-Ju Eom Yujin Kim Ji Eun Ahn Jeong Hwan Kim Nam Soo Han |
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Institution: | (1) Department of Food Science and Technology, BK21 Education and Research Center for Advanced Bio-Agriculture Technology, Chungbuk National University, Cheongju, 361-763, Republic of Korea;(2) Department of Food Science and Technology, Gyeongsang National University, Jinju, 660-701, Republic of Korea; |
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Abstract: | Leuconostoc mesenteroides is a commercially important lactic acid bacterium currently used as a starter for kimchi and kefir. However, its sensitivity
to acid stress limits its performance. L. mesenteroides was grown in a medium supplemented with 3.2 or 6.4 mM glutathione (GSH), and cell survival rates were measured during a long-term
mild acid challenge (pH 4.0). As a result, GSH was imported by the cells and protected against acid stress; thereafter it
was consumed as a nutrient. Acid stress resistance of starter cultures of this bacterium can thus be improved by cultivating
it in media supplemented with GSH. |
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Keywords: | |
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