Effects of aeration of growth and on production of bacteriocins and other metabolites in cultures of eight strains of lactic acid bacteria
2005
Vázquez, José Antonio | Mirón, Jesús | González Fernández, Pilar | Murado García, Miguel Anxo
14 páginas, 8 figuras, 3 tablas
Show more [+] Less [-]In general, it is accepted that the production of bacteriocins in lactic acid bacteria cultures implies moderately to highly restrictive conditions regarding the availability of oxygen. However, the situation appears to be more complex, probably owing to the facultative anaerobic character of these microorganisms. By studying the culture of eight strains of lactic acid bacteria carried out in vessels with different loads of medium within an interval that determines linearly the minimum availability of oxygen, the existence of three types of behavior was highlighted: production increases (1) with the availability of oxygen, (2) with the restriction of this availability, and (3) toward both extremes of these conditions, diminishing in intermediate situations. These behaviors affected not only the production of bacteriocins, but also their metabolic character (in the Luedeking and Piret sense), as well as the production of other characteristic metabolites, such as lactic acid, acetic acid, and ethanol.
Show more [+] Less [-]This study was funded by the Xunta de Galicia (PGIDT99MAR40203) and Improved procedures for flatfish larval rearing through the use of probiotic bacteria (PROBE) from the European Commission (Q5RS-2000-31457). Dr. José Antonio Vázquez Álvarez had a postdoctoral contract (CSIC-I3P-PC 2003) financed by the European Social Fund.
Show more [+] Less [-]Peer reviewed
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