Producibility of Aflatoxins by Aspergillus flavus Group Isolated from Deteriolated Rice in Korea

국내(國內)의 변질미(變質米)에서 분리된 Aspergillus flavus 군(群)의 Aflatoxin 생성능(生成能)

  • Lee, Kwan-Young (Agricultural Biochemistry Laboratory, Korea Atomic Energy Research Institute) ;
  • Lee, Su-Rae (Agricultural Biochemistry Laboratory, Korea Atomic Energy Research Institute)
  • 이관영 (한국원자력연구소 농업생화학연구실) ;
  • 이서래 (한국원자력연구소 농업생화학연구실)
  • Published : 1974.09.28


In order to investigate the producibility of aflatoxins by seven Aspergillus flavus strains isolated from deteriolated rice in Korea, polished rice was artificially inoculated and subjected to isolation and quantitation of the mycotoxin. It was proved that all strains were capable of producing aflatoxins, preferentially $B_1$ but no $G_1$ at all and their producibility was closely related to the color of culture media and chloroform extracts. The strain producing the most aflatoxin was A. flavus var. columnaris, excreting 1 ppm on rice. Aflatoxin $B_1$ was isolated and identified by thin-layer chromatography, ultraviolet absorption spectra and derivative formation of water and acetate adducts.