Biodiversity of Aspergillus species in some important agricultural products

Publication: Research - peer-reviewJournal article – Annual report year: 2007

  • Author: Perrone, Giancarlo

    CNR, Institute of Sciences of Food Production, Italy

  • Author: Susca, A.,

    CNR, Institute of Sciences of Food Production, Italy

  • Author: Cozzi, G.

    CNR, Institute of Sciences of Food Production, Italy

  • Author: Ehrlich, K.

    Southern Regional Research Center/ARS/USDA, USA

  • Author: Varga, J.

    Univerity of Szeged, Department of Microbiology, Hungary

  • Author: Frisvad, Jens Christian

    Center for Microbial Biotechnology, Department of Systems Biology, Technical University of Denmark, Søltofts Plads, 2800, Kgs. Lyngby, Denmark

  • Author: Meijer, M.

    CBS Fungal Biodiversity Centre, The Netherlands

  • Author: Noonim, P.

    Kasetsart University, Department of Food Science and Technology, Thailand

  • Author: Mahakarnchanakul, W.

    Kasetsart University, Department of Food Science and Technology, Thailand

  • Author: Samson, Robert A.

    CBS Fungal Biodiversity Centre, The Netherlands

View graph of relations

The genus Aspergillus is one of the most important filamentous fungal genera. Aspergillus species are used in the fermentation industry, but they are also responsible of various plant and food secondary rot, with the consequence of possible accumulation of mycotoxins. The aflatoxin producing A. flavus and A. parasiticus, and ochratoxinogenic A. niger, A. ochraceus and A. carbonarius species are frequently encountered in agricultural products. Studies on the biodiversity of toxigenic Aspergillus species is useful to clarify molecular, ecological and biochemical characteristics of the different species in relation to their different adaptation to environmental and geographical conditions, and to their potential toxigenicity. Here we analyzed the biodiversity of ochratoxin producing species occurring on two important crops: grapes and coffee, and the genetic diversity of A. flavus populations occurring in agricultural fields. Altogether nine different black Aspergillus species can be found on grapes which are often difficult to identify with classical methods. The polyphasic approach used in our studies led to the identification of three new species occurring on grapes: A. brasiliensis, A. ibericus, and A. uvarum. Similar studies on the Aspergillus species occurring on coffee beans have evidenced in the last five years that A. carbonarius is an important source of ochratoxin A in coffee. Four new species within the black aspergilli were also identified in coffee beans: A. scierotioniger, A. lacticoffeatus, A. sclerotiicarbonarius, and A. aculeatinus. The genetic diversity within A. flavus populations has been widely studied in relation to their potential aflatoxigenicity and morphological variants L- and S-strains. Within A. flavus and other Aspergillus species capable of aflatoxin production, considerable diversity is found. We summarise the main recent achievements in the diversity of the aflatoxin gene cluster in A. flavus populations, A. parasiticus and the non-toxigenic A. oryzae. Studies are needed in order to characterise the aflatoxin biosynthetic genes in the new related taxa A. minisclerotigenes and A. arachidicola.
Original languageEnglish
JournalStudies in Mycology
Publication date2007
Volume59
Pages53-66
ISSN0166-0616
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 48

Keywords

  • grapes, Sect. Flavi, aflatoxins, polyphasic identification coffee beans, ochratoxin A, Aspergillus Sect. Nigri
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

ID: 3238557