Cellulase activities of pine-wood nematode isolates with different virulences

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  • 病原力の異なるマツノザイセンチュウの分泌するセルラーゼの牲質
  • 病原力の異なるマツノザイセンチュウの分泌するセルラーゼの性質
  • ビョウゲンリョク ノ コトナル マツノザイセンチュウ ノ ブンピスル セルラー

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Abstract

Active staining following electrophoresis of the exudations of pine-wood nematode (Bursaphelenchus xylophilus (STEINER et BUHRER) NICKLE) showed that less virulent isolates also produces cellulase. Banding patterns of cellulases secreted by the virulent isolates and the less virulent isolates were essentially similar, but the patterns were different from that of B. mucronatus (MAMIYA et ENDA). Their cellulase activities correlated positively with the virulences of the isolates. Furthermore, we showed that the cellulase produced by B. xylophilus is capable of decomposing crystalline cellulose. This indicates that the cellulase can react on the cell wall cellulose and destroy wood of the host pine. These results strongly suggest that cellulase secreted by the pine-wood nematodes is the pathogenic substance of the pine-wilt disease.

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