In situ enrichment of folate by microorganisms in beta-glucan rich oat and barley matrices

被引:46
作者
Kariluoto, Susanna [1 ]
Edelmann, Minnamari [1 ]
Nystrom, Laura [1 ]
Sontag-Strohm, Tuula [1 ]
Salovaara, Hannu [1 ]
Kivela, Reetta [1 ]
Herranen, Mirkka [2 ]
Korhola, Matti [2 ]
Piironen, Vieno [1 ]
机构
[1] Univ Helsinki, Dept Food & Environm Sci, FIN-00014 Helsinki, Finland
[2] Univ Helsinki, Dept Biol Sci, FIN-00014 Helsinki, Finland
基金
芬兰科学院;
关键词
Folate; Fermentation; Barley; Oat; Beta-glucan; Viscosity; LACTIC-ACID BACTERIA; CULTIVATION CONDITIONS; CONCENTRATED-SOLUTION; FIBER COMPONENTS; CULTURES; VARIETIES; SELECTION; RYE;
D O I
10.1016/j.ijfoodmicro.2014.01.018
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
The objective was to study folate production of yeast strains, bacteria isolated from oat bran, and selected lactic acid bacteria as well as one propionibacterium in oat and barley based models. Simultaneously, we aimed at sustaining the stability of viscosity, representing the physicochemical state of beta-glucan. Total folate contents were determined microbiologically and vitamers for selected samples by UHPLC. Folate in yeast cells comprised mainly 5-methyltetrahydrofolate and tetrahydrofolate. Folate production by microbes in YPD medium was different to that in cereal fermentations where vitamers included 5-methyltetrahydrofolate, 5,10-methenyltetrahydrofolate and formylated derivatives. Microbes producing significant amounts of folate without affecting viscosity were Saccharomyces cerevisiae ALKO743 and Candida milleri ABM4949 among yeasts and Pseudomonas sp. ON8 and Janthinobacterium sp. RB4 among bacteria. Net folate production was up to 120 ng/g after 24 h fermentation and could increase during 2-week storage. Glucose addition increased the proportion of 5-methyltetrahydrofolate. Streptococcus thermophilus ABM5097, Lactobacillus reuteri, and Propionibacterium sp. ABM5378 produced folate but in lower concentrations. Both endogenous and added microbes contribute to folate enhancement. Selection of microbes with folate producing capability and limited hydrolytic activity will enable the development of products rich in folate and beta-glucan. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:38 / 48
页数:11
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