Influence of Gamma-Irradiation on the Growth of Aspergillus spp. on Feeds for Ensuring Feed Safety

사료의 안전성 확보를 위한 Aspergillus속 곰팡이의 생육에 대한 감마선 조사 효과

  • Nam, Bo-Ram (Division of Applied Life Science(BK21 program), Graduate School, Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Kim, Kyeong-Yeol (Division of Applied Life Science(BK21 program), Graduate School, Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Ryu, Hee-Jeong (Division of Applied Life Science(BK21 program), Graduate School, Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Nam, Min-Ji (Division of Applied Life Science(BK21 program), Graduate School, Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Shim, Won-Bo (Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Yoon, Yo-Han (Team for Radiation Food Science and Biotechnology, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Kim, Jae-Hun (Team for Radiation Food Science and Biotechnology, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Lee, Ju-Woon (Team for Radiation Food Science and Biotechnology, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Byun, Myung-Woo (Team for Radiation Food Science and Biotechnology, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Chung, Duck-Hwa (Division of Applied Life Science(BK21 program), Graduate School, Institute of Agriculture and Life Science, Gyeongsang National University)
  • 남보람 (경상대학교 응용생명과학부(BK 21 program)) ;
  • 김경열 (경상대학교 응용생명과학부(BK 21 program)) ;
  • 류희정 (경상대학교 응용생명과학부(BK 21 program)) ;
  • 남민지 (경상대학교 응용생명과학부(BK 21 program)) ;
  • 심원보 (경상대학교 농업생명과학연구원) ;
  • 윤요한 (한국원자력연구원 방사선과학연구소 방사선식품생명공학연구실) ;
  • 김재훈 (한국원자력연구원 방사선과학연구소 방사선식품생명공학연구실) ;
  • 이주운 (한국원자력연구원 방사선과학연구소 방사선식품생명공학연구실) ;
  • 변명우 (한국원자력연구원 방사선과학연구소 방사선식품생명공학연구실) ;
  • 정덕화 (경상대학교 응용생명과학부(BK 21 program))
  • Received : 2009.12.24
  • Accepted : 2010.02.10
  • Published : 2010.06.30

Abstract

Aspergillus spp. is widely spread in the world on feeds and foods. They have been known to produce aflatoxins, which are mutagenic and carcinogenic to humans. The objective of this study was to determine the optimum gamma-irradiation dose for controling the growth of Aspergillus spp. to ensure safety of feeds. Four species fungal spore ($10^7$ spore/mL) exposed to 0, 1, 3, 5, 7 and 10 kGy of gamma radiation were inhibited in their growth and $AFB_1$ productivity by ${\geq}5\;kGy$. Meantime, the growth of fungal inoculated on feeds was inhibited at ${\geq}3\;kGy$. However, $AFB_1$ presented in aqueous solution was not be inactivated completely by ${\leq}10\;kGy$ irradiation. These results indicate that Aspergillus spp. on feeds could be controlled by 5 kGy gamma-irradiation but detoxification of $AFB_1$ demands a higher dose of gamma-irradiation (${\geq}10\;kGy$).

Keywords

gamma-irradiation;Aspergillus spp.;aflatoxin $B_1$;feed

Acknowledgement

Grant : 방사선기술 이용 간접식품의 곰팡이 및 독소 제어에 관한 연구

Supported by : 과학재단

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