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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 68,
  • Issue 8,
  • pp. 920-924
  • (2014)

Differentiation of Aflatoxigenic and Non-Aflatoxigenic Strains of Aspergilli by FT-IR Spectroscopy

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Abstract

Fourier transform infrared spectroscopy (FT-IR) is a well-established and widely accepted methodology to identify and differentiate diverse microbial species. In this study, FT-IR was used to differentiate 20 strains of ubiquitous and agronomically important phytopathogens of <i>Aspergillus flavus</i> and <i>Aspergillus parasiticus</i>. By analyzing their spectral profiles via principal component and cluster analysis, differentiation was achieved between the aflatoxin-producing and nonproducing strains of both fungal species. This study thus indicates that FT-IR coupled to multivariate statistics can rapidly differentiate strains of <i>Aspergilli</i> based on their toxigenicity.

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