Diversities of decay resistance and n-hexane-extractive contents in seven half-sib families from plus trees in todomatsu (Abies sachalinensis)

作者：Takashima Yuya; Tamura Akira; Noseda Naoya; Tanabe Jun; Makino Kazuko; Ishiguri Futoshi^*; Habu Naoto; Iizuka Kazuya; Yokota Shinso

来源：Journal of Wood Science, 2015, 61(2): 192-198.

DOI：10.1007/s10086-014-1448-5

• Abies sachalinensis
• n-Hexane extracts
• Decay resistance
• Tree breeding

Todomatsu (Abies sachalinensis) is a commercial plantation species on Hokkaido Island, Japan. In the present study, to improve the decay resistance of todomatsu wood, seven families of 22-year-old todomatsu trees were investigated for family diversities in decay resistance of heartwoods against Fomitopsis palustris and Trametes versicolor and n-hexane-extractive contents in heartwoods. In addition, antifungal activity tests of n-hexane extracts were conducted for F. palustris and T. versicolor. Mean percentages of wood mass loss by F. palustris and T. versicolor were 18.2 and 10.5 %, respectively. Significant differences in mass loss and n-hexane-extractive contents were not found among seven families tested here. The mean value of n-hexane-extractive contents was 6.4 mg/g. By gas chromatography/mass spectrometry analysis, a main component of n-hexane extracts was suggested to be juvabione. Results of the antifungal activity test show that mycelial growth of F. palustris and T. versicolor was strongly inhibited over the concentration of 225 and 150 A mu g per disc, respectively. These concentrations corresponded to about 10.0 and 6.6 mg/g in wood. Thus, it is concluded that the todomatsu trees containing more than 10.0 mg/g of n-hexane extracts should be selected among the families for high decay resistance.

• 出版日期2015-4