Global transcriptional analysis of Lactobacillus plantarum WCFS1 at low temperature and low pH
2011
Yasokawa, D. | Hashido, T.
Due to a cool climate, grapes harvested in Hokkaido tend to contain more acid than those in the southern part of Japan. Crucial to the production of high-quality wine in Hokkaido is reduction in the sour taste associated with higher levels of acidity. To test the hypothesis that Hokkaido is too cool for the activation of malolactic fermentation, genome-wide expression profiling of the response to low temperature/low pH in the lactic acid bacterium Lactobacillus plantarum WCFS1 was performed, since L. plantarum decarboxylates L-malate to L-lactate. The biological characteristics of upregulated open reading frames were assigned and analyzed according to the KEGG PATHWAY database (Kyoto Encyclopedia of Genes and Genomes, http://www.genome.jp/kegg/). Significant induction of sugar transport system was observed in low temperature/low pH. Furthermore, transcription of malate transport protein gene (lp_1119) and malolactic enzyme gene (lp_1118) were strongly upregulated in the same conditions. This response indicates that L. plantarum suffers from energy shortage.
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