Fumonisin B2 production by Aspergillus niger in Thai coffee beans

P. Noonim, W. Mahakarnchanakul, K.F. Nielsen, J.C. Frisvad, R.A. Samson

    Research output: Contribution to journal/periodicalArticleScientificpeer-review

    Abstract

    During 2006 and 2007, a total of 64 Thai dried coffee bean samples (Coffea arabica) from two growing sites in Chiangmai Province and 32 Thai dried coffee bean samples (Coffea canephora) from two growing sites in Chumporn Province, Thailand, were collected and assessed for fumonisin contamination by black Aspergilli. No Fusarium species known to produce fumonisin were detected, but black Aspergilli had high incidences on both Arabica and Robusta Thai coffee beans. Liquid chromatography (LC) with high-resolution mass spectrometric (HRMS) detection showed that 67% of Aspergillus niger isolates from coffee beans were capable of producing fumonisins B(2) (FB(2)) and B(4) when grown on Czapek Yeast Agar with 5% NaCl. Small amounts (1-9.7 ng g(-1)) of FB(2) were detected in seven of 12 selected coffee samples after ion-exchange purification and LC-MS/MS detection. Two samples also contained FB(4). This is the first record of freshly isolated A. niger strains producing fumonisins and the first report on the natural occurrence of FB(2) and FB(4) in coffee.
    Original languageEnglish
    Pages (from-to)94-100
    JournalFood Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
    Volume26
    Issue number1
    DOIs
    Publication statusPublished - 2009

    Fingerprint

    Dive into the research topics of 'Fumonisin B2 production by Aspergillus niger in Thai coffee beans'. Together they form a unique fingerprint.

    Cite this