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Bacterial Diversity and Mycotoxin Reduction during Maize Fermentation (steeping) for Ogi Production

Authors: EZEAMAGU Cajethan

Publication Type: Journal article

Journal: Frontiers In Microbiology

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Abstract

Bacterial diversity and community structure of two maize varieties (white and yellow) during fermentation/steeping for ogi production, and the in?uence of spontaneous fermentation on mycotoxin reduction in the gruel were studied. A total of 142 bacterial isolates obtained at 24–96 h intervals were preliminarily identi?ed by conventional microbiological methods while 60 selected isolates were clustered into 39 OTUs consisting of 15 species, 10 genera, and 3 phyla by 16S rRNA sequence analysis. Lactic acid bacteria constituted about 63% of all isolated bacteria and the genus Pediococcus dominated (white maize = 84.8%; yellow maize = 74.4%). Pediococcus acidilactici and Lactobacillus paraplantarum were found at all steeping intervals of white and yellow maize, respectively, while P. claussenii was present only at the climax stage of steeping white maize. In both maize varieties, P. pentosaceus was found at 24–72 h. Mycotoxin concentrations (?g/kg) in the unsteeped grains were: white maize (a?atoxin B1 = 0.60; citrinin = 85.8; cyclopiazonic acid = 23.5; fumonisins (B1/B2/B3) = 68.4– 483; zearalenone = 3.3) and yellow maize (a?atoxins (B1/B2/M1) = 22.7–513; citrinin = 16,800; cyclopiazonic acid = 247; fumonisins (B1/B2/B3) = 252–1,586; zearalenone = 205). Mycotoxins in both maize varieties were signi?cantly (p < 0>

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EZEAMAGU,C. . (2015). Bacterial Diversity and Mycotoxin Reduction during Maize Fermentation (steeping) for Ogi Production, 6 (), 1-1.

EZEAMAGU,C. . "Bacterial Diversity and Mycotoxin Reduction during Maize Fermentation (steeping) for Ogi Production" 6, no (), (2015): 1-1.

EZEAMAGU,C. and . (2015). Bacterial Diversity and Mycotoxin Reduction during Maize Fermentation (steeping) for Ogi Production, 6 (), pp1-1.

EZEAMAGUC, . Bacterial Diversity and Mycotoxin Reduction during Maize Fermentation (steeping) for Ogi Production. 2015, 6 ():1-1.

EZEAMAGU,Cajethan , . "Bacterial Diversity and Mycotoxin Reduction during Maize Fermentation (steeping) for Ogi Production", 6 . (2015) : 1-1.

E.Cajethan , "Bacterial Diversity and Mycotoxin Reduction during Maize Fermentation (steeping) for Ogi Production" vol.6, no., pp. 1-1, 2015.

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