Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Korea.
Plant Pathol J. 2013 Mar;29(1):116-22. doi: 10.5423/PPJ.OA.06.2012.0091.
To evaluate the mechanisms of pathogenicity and non-pathogenicity of Bursaphelenchus xylophilus and B. mucronatus isolated in South Korea, we used 4-year-old P. thunbergii seedlings and 20-cm long one-year-old stem cuttings of 5-year-old Pinus thunbergii, and studied distributions and multiplications of pine wood nematodes after inoculation. The distributions of B. xylophilus in the 20-cm pine stem cuttings were not significantly different from that of B. mucronatus. Conversely, the proliferation rate of B. xylophilus on mycelial mats of Botrytis cinerea was significantly different from that of B. mucronatus. The study using 4-year-old P. thunbergii seedlings also showed that B. mucronatus can migrate to distal portions of the pine seedlings the same as B. xylophilus, but the populations of B. xylophilus remaining in the pine seedlings were relatively larger than those of B. mucronatus. Therefore, we concluded that the pathogenicity of B. xylophilus could be strongly influenced by its ability to multiply.
为了评估在韩国分离的拟松材线虫和松材线虫致病性和非致病性的机制，我们使用了 4 年生的黑松实生苗和 5 年生的 20cm 长的一年生黑松茎段，并研究了接种后松材线虫的分布和繁殖情况。拟松材线虫在 20cm 长的黑松茎段中的分布与松材线虫没有显著差异。相反，拟松材线虫在葡萄孢菌菌丝丝垫上的增殖率与松材线虫有显著差异。使用 4 年生黑松实生苗的研究也表明，松材线虫可以像拟松材线虫一样迁移到松树苗的远端，但松材线虫在松树苗中残留的种群相对较大。因此，我们得出结论，拟松材线虫的致病性可能受到其繁殖能力的强烈影响。
