High Levels of CO₂ Induce Spoilage by Leuconostoc mesenteroides by Upregulating Dextran Synthesis Genes.

ABSTRACT: During nonventilated storage of carrots, CO₂ gradually accumulates to high levels and causes modifications in the carrot's microbiome toward dominance of Lactobacillales and Enterobacteriales The lactic acid bacterium Leuconostoc mesenteroides secretes a slimy exudate over the surface of the carrots. The objective of this study was to characterize the slime components and the potential cause for its secretion under high CO₂ levels. A proteomic analysis of the exudate revealed bacterial glucosyltransferases as the main proteins, specifically, dextransucrase. A chemical analysis of the exudate revealed high levels of dextran and several simple sugars. The exudate volume and dextran amount were significantly higher when L. mesenteroides was in

SUBMITTER: Dror B 

PROVIDER: S-EPMC6293096 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature