Migration of Bursaphelenchus xylophilus in cortical and xylem axial resin canals of resistant pines

作者：Son J A^*; Matsushita N; Hogetsu T

来源：Forest Pathology, 2015, 45(3): 246-253.

DOI：10.1111/efp.12164

Migration of the pine wood nematode (PWN), Bursaphelenchus xylophilus, in susceptible and resistant pines was investigated at the tissue level. PWN was inoculated onto the top cross-cut surface of 20-cm stem cuttings of susceptible Pinus thunbergii and resistant pines (P.strobus, P.rigida and P.thunbergii of a resistant family Namikata-(t)-73 (half-sib)). PWNs were mainly distributed in cortical resin canals of susceptible P.thunbergii down to 15cm from the inoculated surface by 6h after inoculation (HAI) and all tissues (including cortical and xylem resin canals) down to the bottom at 192 HAI. In P.strobus, P.rigida and P.thunbergii family Namikata-(t)-73 (half-sib), PWN was distributed in cortical resin canals down to 5cm by 6 HAI and down to the base at 192 HAI. However, the distribution of PWN in xylem resin canals of the resistant pines was restricted near inoculated surfaces down to 5cm, even at 192 HAI. These results demonstrated that migration of PWN in resistant pines was slowed in cortical resin canals and restricted in xylem axial resin canals, features which may be associated with the resistance.

• 出版日期2015-6