Ochratoxin production and taxonomy of the yellow aspergilli (Aspergillus section Circumdati)

C. M. Visagie, J. Varga, J. Houbraken, M. Meijer, S. Kocsubé, N. Yilmaz, R. Fotedar, K. A. Seifert, J. C. Frisvad, R. A. Samson

Research output: Contribution to journalArticle

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Abstract

Aspergillus section Circumdati or the Aspergillus ochraceus group, includes species with rough walled stipes, biseriate conidial heads, yellow to ochre conidia and sclerotia that do not turn black. Several species are able to produce mycotoxins including ochratoxins, penicillic acids, and xanthomegnins. Some species also produce drug lead candidates such as the notoamides. A polyphasic approach was applied using morphological characters, extrolite data and partial calmodulin, ß-tubulin and ITS sequences to examine the evolutionary relationships within this section. Based on this approach the section Circumdati is revised and 27 species are accepted, introducing seven new species: A. occultus, A. pallidofulvus, A. pulvericola, A. salwaensis, A. sesamicola, A. subramanianii and A. westlandensis. In addition we correctly apply the name A. fresenii (= A. sulphureus (nom. illeg.)). A guide for the identification of these 27 species is provided. These new species can be distinguished from others based on morphological characters, sequence data and extrolite profiles. The previously described A. onikii and A. petrakii were found to be conspecific with A. ochraceus, whilst A. flocculosus is tentatively synonymised with A. ochraceopetaliformis, despite extrolite differences between the two species. Based on the extrolite data, 13 species of section Circumdati produce large amounts of ochratoxin A: A. affinis, A. cretensis, A. fresenii, A. muricatus, A. occultus, A. ochraceopetaliformis (A. flocculosus), A. ochraceus, A. pseudoelegans, A. pulvericola, A. roseoglobulosus, A. sclerotiorum, A. steynii and A. westerdijkiae. Seven additional species produce ochratoxin A inconsistently and/or in trace amounts: A. melleus, A. ostianus, A. persii, A. salwaensis, A. sesamicola, A. subramanianii and A. westlandensis. The most important species regarding potential ochratoxin A contamination in agricultural products are A. ochraceus, A. steynii and A. westerdijkiae.

Original languageEnglish
Pages (from-to)1-61
Number of pages61
JournalStudies in Mycology
Volume78
Issue number1
DOIs
Publication statusPublished - 2014

Fingerprint

Aspergillus ochraceus
Ochratoxins
ochratoxins
Aspergillus
ochratoxin A
taxonomy
Penicillic Acid
penicillic acid
Introduced Species
Fungal Spores
sclerotia
Mycotoxins
new species
calmodulin
Calmodulin
Tubulin
agricultural products
tubulin
mycotoxins
conidia

Keywords

  • Ascomycetes
  • Eurotiales
  • Food spoilage
  • Indoor environment
  • Mycotoxin

ASJC Scopus subject areas

  • Plant Science

Cite this

Ochratoxin production and taxonomy of the yellow aspergilli (Aspergillus section Circumdati). / Visagie, C. M.; Varga, J.; Houbraken, J.; Meijer, M.; Kocsubé, S.; Yilmaz, N.; Fotedar, R.; Seifert, K. A.; Frisvad, J. C.; Samson, R. A.

In: Studies in Mycology, Vol. 78, No. 1, 2014, p. 1-61.

Research output: Contribution to journalArticle

Visagie, CM, Varga, J, Houbraken, J, Meijer, M, Kocsubé, S, Yilmaz, N, Fotedar, R, Seifert, KA, Frisvad, JC & Samson, RA 2014, 'Ochratoxin production and taxonomy of the yellow aspergilli (Aspergillus section Circumdati)', Studies in Mycology, vol. 78, no. 1, pp. 1-61. https://doi.org/10.1016/j.simyco.2014.07.001
Visagie, C. M. ; Varga, J. ; Houbraken, J. ; Meijer, M. ; Kocsubé, S. ; Yilmaz, N. ; Fotedar, R. ; Seifert, K. A. ; Frisvad, J. C. ; Samson, R. A. / Ochratoxin production and taxonomy of the yellow aspergilli (Aspergillus section Circumdati). In: Studies in Mycology. 2014 ; Vol. 78, No. 1. pp. 1-61.
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