Biological Control of Cyclamen Soilborne Diseases by Serratia marcescens Strain B2

Authors:
  • NSN. Someya and N. Kataoka, Faculty of Agriculture, Ibaraki University, Ami-machi, Ibaraki 300-0393, Japan; T. Komagata, Ibaraki Horticultural Research Institute, Minori-machi, Ibaraki 319-02, Japan; K. Hirayae, Kyushu National Agricultural Experiment Stati
    N. Someya and N. Kataoka, Faculty of Agriculture, Ibaraki University, Ami-machi, Ibaraki 300-0393, Japan; T. Komagata, Ibaraki Horticultural Research Institute, Minori-machi, Ibaraki 319-02, Japan; K. Hirayae, Kyushu National Agricultural Experiment Stati
  • NSNasim Sedighian
    Nasim Sedighian
  • STS Mohsen Taghavi
    S Mohsen Taghavi
  • EOEbrahim Osdaghi
    Ebrahim Osdaghi
  • MSMasoud Shams-Bakhsh
    Masoud Shams-Bakhsh
  • WEWade H. Elmer
    Wade H. Elmer
  • MDMargery L. Daughtrey
    Margery L. Daughtrey
  • GPGargee Dhar Purkayastha
    Gargee Dhar Purkayastha
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Abstract
Cyclamen plants were treated with a highly chitinolytic bacterium, Serratia marcescens strain B2, and then challenge inoculated with Rhizoctonia solani sclerotia or Fusarium oxysporum f. sp. cyclaminis conidia. The bacterium suppressed these fungal diseases of cyclamen plants, especially the damping off caused by R. solani, in a greenhouse. Strain B2 survived at approximately 106 to 107 CFU/g in soil for 4 months after the initial application under greenhouse conditions. Chitinolytic enzymes and antifungal low-molecular-weight compounds were present in filtrates of S. marcescens B2, which suppressed germination of R. solani sclerotia in vitro.

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