AI Article Synopsis
- Cowpea seed samples from South Africa and Benin were tested for the presence of various Fusarium species, revealing several types including F. equiseti and F. graminearum.
- Analysis for fumonisin production indicated that South African cowpea cultivars contained fumonisin B(1) at levels from 0.12 to 0.61 microg/g, while Benin samples showed no fumonisin presence.
- This study marks the first report of natural fumonisin B(1) accumulation in cowpea seeds, with F. proliferatum isolates producing total fumonisin concentrations ranging from 0.8 to 25.30 microg/g.
Article Abstract
Cowpea seed samples from South Africa and Benin were analyzed for seed mycoflora. Fusariumspecies detected were F. equiseti, F. chlamydosporum, F. graminearum, F. proliferatum, F. sambucinum, F. semitectum, and F. subglutinans. Cowpea seed from South Africa and Benin and F. proliferatum isolates from Benin, inoculated onto maize patty medium, were analyzed for fumonisin production. Samples were extracted with methanol/water and cleaned up on strong anion exchange solid phase extraction cartridges. HPLC with precolumn derivatization using o-phthaldialdehyde was used for the detection and quantification of fumonisins. Cowpea cultivars from South Africa showed the presence of fumonisin B(1) at concentrations ranging between 0.12 and 0.61 microg/g, whereas those from Benin showed no fumonisins. This is believed to be the first report of the natural occurrence of FB(1) on cowpea seed. Fumonisin B(1), B(2), and B(3) were produced by all F. proliferatum isolates. Total fumonisin concentrations were between 0.8 and 25.30 microg/g, and the highest level of FB(1) detected was 16.86 microg/g.
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| http://dx.doi.org/10.1021/jf026121v | DOI Listing |
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