Cryopreservation of Pine Wood Nematode, Bursaphelenchus xylophilus

  • Park, Ju-Yong (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Shin, Keum-Chul (Tree Pathology and Mycology Laboratory, Kangwon National University) ;
  • Kim, Kyung-Hee (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Lee, Seung Kyu (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Lee, Jong Kyu (Tree Pathology and Mycology Laboratory, Kangwon National University)
  • Received : 2005.08.23
  • Accepted : 2005.08.31
  • Published : 2005.10.31

Abstract

Pine wood nematode isolates from Haman, Gyoungsangnam-do were cryopreserved with three different cryoprotectants (glycerol, ethylene glycol and dimethylsulfoxide), Nematode Growth medium (NGM) and M 9 buffer solution, respectively, and then survival rate, reproduction ability, and pathogenicity of stored nematodes were compared. Survival rates of juvenile was excellent in 15% glycerol solution as $72{\pm}5.3%$. The survival ability of nematodes at juvenile stage was more efficient than that of nematodes at adult stage. Pre-incubation treatment at $4^{\circ}C$ before storing in liquid nitrogen didn't affect the survival ability of pine wood nematode. When the reproduction ability of nematodes was confirmed on Botrytis cinerea agar plates at $28^{\circ}C$ incubator, there was no difference between cryopreserved and non-cryopreserved. Pathogenic ability of cryopreserved nematodes was also evaluated and confirmed by artificially inoculating them on 2-year old red pine seedlings.

Keywords

References

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