接种松材线虫后黑松接种枝内细菌和线虫的数量变化

Dynamics of densities of bacteria and nematode in the branches of Pinus thunbergii inoculated with Bursaphelenchus xylophilus

对接种松材线虫Bursaphelenchus xylophilus后3年生黑松Pinus thunbergii接种枝内的细菌和线虫的数量变化进行了观察。结果表明:接种后最初几天内线虫从接种点向其他部分移动缓慢;至接种的主干上松脂减少时,线虫开始增加,木块组织的带菌率的变化与线虫数量的变化趋势相似,细菌和线虫的数量与病树的症状发展密切相关。细菌的优势属为假单胞杆菌属Pseudomanas。

Changes in densities of bacteria nematode in the branches of 3-year-old Pinus thunbergii inoculated with pine wood nematodes were observed. In the early days after inoculation, the nematodes moved slowly to other parts of the tree. Density of the nematode began to increase when the resins in the inoculated trunk decreased. The changing tendency in the percentage of the wood blocks containing bacteria was similar to the dynamics of the nematode. The densities of the nematodes and bacteria increased in accordance with pathogenic symptom development. The dominant genus of the bacterium complex was Pseudomonas. [ Ch, 3 tab. 9 ref. ]