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Inhibitory Effect of Moriniafungin Produced by Setosphaeria rostrata F3736 on the Development of Rhizopus Rot

  • Park, Min Young (Department of Biosystems and Biotechnology, Korea University Graduate School) ;
  • Park, So Jung (Food-Biotech Research, LOTTE R&D Center) ;
  • Kim, Jae-Jin (Division of Environmental Science and Ecological Engineering, College of Life Science and Biotechnology, Korea University) ;
  • Lee, Dong Ho (Department of Biosystems and Biotechnology, Korea University Graduate School) ;
  • Kim, Beom Seok (Department of Biosystems and Biotechnology, Korea University Graduate School)
  • Received : 2020.09.09
  • Accepted : 2020.11.09
  • Published : 2020.12.01

Abstract

Rhizopus rot is a serious postharvest disease of various crops caused by Rhizopus spp. and controlled mainly by synthetic fungicides. We detected the antifungal activity of a culture extract of Setosphaeria rostrata F3736 against Rhizopus oryzae. The active ingredient was identified as moriniafungin, a known sordarin derivative, which showed minimum inhibitory concentrations of 1-8 ㎍/ml against Colletotrichum spp. and 0.03-0.13 ㎍/ml against Rhizopus spp. in vitro. Moriniafungin showed protective control efficacies against Rhizopus rot on apple and peach fruits. Treatment with 25 ㎍/ml moriniafungin delimited the lesion diameter significantly by 100% on R. oryzae-inoculated apple fruits compared with the non-treated control. Treatment with 0.04 ㎍/ml of moriniafungin reduced the lesion diameter significantly by 56.45%, and treatment with higher concentrations of 0.2-25 ㎍/ml reduced the lesion diameter by 70-90% on Rhizopus stolonifer var. stolonifer-inoculated peach fruit. These results suggest moriniafungin has potential as a control agent of postharvest diseases caused by Rhizopus spp.