EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Effect of citrate on production of diacetyl and acetoin by Lactococcus lactis ssp. lactis CNRZ 483 cultivated in the presence of oxygen






Journal of Dairy Science 80(4): 634-639

Effect of citrate on production of diacetyl and acetoin by Lactococcus lactis ssp. lactis CNRZ 483 cultivated in the presence of oxygen

The effect was studied of trisodium citrate addition on the growth and formation of diacetyl and acetoin by Lactococcus lactis ssp. lactis CNRZ 483 in a whey-based medium under an oxygen pressure of 2 atm. Growth increased, as shown by the final absorbance of the culture, which was 1.2 in the absence of citrate and 2.8 in the presence of 26 mM citrate. In the absence of citrate, maximal concentrations of diacetyl and acetoin were 0.09 and 0.29 mM, respectively. When citrate was added at 6.2, 11.5, and 26 mM, the maximal diacetyl concentrations were 0.45, 0.53, and 0.85 mM, and those of acetoin were 3.6, 4.5, and 8.5 mM, respectively. However, under these conditions, the yield of citrate bioconversion to diacetyl and acetoin decreased as the initial concentration of citrate increased. Yields were 121, 83, and 70% in the presence of 6.2, 11.5, and 26 mM citrate, respectively.

Accession: 002811070

DOI: 10.3168/jds.s0022-0302(97)75981-2

Download PDF Full Text: Effect of citrate on production of diacetyl and acetoin by Lactococcus lactis ssp. lactis CNRZ 483 cultivated in the presence of oxygen



Related references

Effect of temperature on diacetyl and acetoin production by Lactococcus lactis subsp. lactis biovar diacetilactis CNRZ 483. Journal of Dairy Research 62(1): 123-129, 1995

Effect of initial oxygen concentration on diacetyl and acetoin production by Lactococcus lactis ssp. lactis biovar diacetylactis. Applied and Environmental Microbiology 59(6): 1893-1897, 1993

Combined effect of oxygen and temperature on acidification and production of diacetyl and acetoin by Lactococcus lactis var. lactis biovar. diacetylactis. Lait 74(2): 115-126, 1994

Improvement of diacetyl production by Lactococcus lactis ssp. lactis CNRZ 483 through oxygen control. Journal of Dairy Science 79(5): 775-781, 1996

Isolation and properties of Lactococcus lactis subsp. lactis biovar diacetylactis CNRZ 483 mutants producing diacetyl and acetoin from glucose. Applied and Environmental Microbiology 63(6): 2293-2299, 1997

The role of NADH-oxidation in acetoin and diacetyl production from glucose in Lactococcus lactis subsp. lactis MG1363. FEMS Microbiology Letters 156(1): 15-19, 1997

Enhancement of diacetyl production by a diacetyl-resistant mutant of citrate-positive Lactococcus lactis spp. lactis 3022 and by aerobic conditions of growth. Journal of Dairy Science 73(2): 291-298, 1990

Enhancement of diacetyl production by a diacetyl-resistant mutant of citrate-positive Lactococcus lactis ssp. lactis 3022 and by aerobic conditions of growth. Journal of dairy science 73(2): 291-298, 1990

Acetoin fermentation by citrate-positive Lactococcus lactis subsp. lactis 3022 grown aerobically in the presence of hemin or Cu2+. Applied and Environmental Microbiology 56(9): 2644-2649, 1990

Acetoin fermentation by citrate positive lactococcus lactis ssp lactis 3022 grown aerobically in the presence of hemin or copper ion. Applied & Environmental Microbiology 56(9): 2644-2649, 1990