English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/143314
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Glucolytic fingerprinting reveals metabolic groups within the genus Bifidobacterium: An exploratory study

AuthorsRios-Covián, David ; Sánchez García, Borja ; Cuesta Suárez, Isabel ; Cueto-Díaz, S.; Hernández-Barranco, Ana María ; Gueimonde Fernández, Miguel ; González de los Reyes-Gavilán, Clara
KeywordsResting cells
Lactic acid
Metabolic group
Acetic acid
Issue Date3-Feb-2016
PublisherWageningen Academic Publishers
CitationBeneficial Microbes 7(2): 265-273 (2016)
AbstractMicroorganisms of the genus Bifidobacterium are inhabitants of diverse niches including the digestive tract of humans and animals. The species Bifidobacterium adolescentis, Bifidobacterium animalis, Bifidobacterium bifidum, Bifidobacterium breve and Bifidobacterium longum have qualified presumption of safety status granted by EFSA and several strains are considered probiotic, and are being included in functional dairy fermented products. In the present work we carried out a preliminary exploration of general metabolic characteristics and organic acid production profiles of a reduced number of strains selected from these and other species of the genus Bifidobacterium. The use of resting cells allowed obtaining metabolic fingerprints without interference of metabolites accumulated during growth in culture media. Acetic acid was the most abundant organic acid formed per mol of glucose consumed (from 1.07±0.03 to 1.71±0.22 mol) followed by lactic acid (from 0.34±0.06 to 0.90±0.12 mol), with moderate differences in production among strains; pyruvic, succinic and formic acids were also produced at considerably lower proportions, with variability among strains. The acetic to lactic acid ratio showed lower values in stationary phase as regard to the exponential phase for most, but not all, the microorganisms; this was due to a decrease in acetic acid molar proportions together with increases of lactic acid proportions in stationary phase. A linear discriminant analysis allowed to cluster strains into species with 51-100% probability, evidencing different metabolic profiles, according to the relative production of organic acids from glucose by resting cells, of microorganisms collected at the exponential phase of growth. Looking for a single metabolic marker that could adequately discriminate metabolic groups, we found that groups established by the acetic to lactic acid ratio fit well with differences previously evidenced by the discriminant analysis. The proper establishment of metabolic groups within the genus Bifidobacterium could help to select the best suited probiotic strains for specific applications.
Publisher version (URL)https://doi.org/10.3920/BM2015.0129
Identifiersissn: 1876-2891
Appears in Collections:(IPLA) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.