Discoloured and non-conductive sapwood among six Fagaceae species inoculated with Raffaelea quercivora

Berlin

2007

S. 73-79

1 Abb., 3 Tab., 16 Lit. Ang.

Artikel aus einer ZeitschriftUnselbständiges Werk

200138810

Mass mortality of oak trees has been occurring in Japan since the late 1980s. The fungus Raffaelea quercivora has been frequently isolated from discoloured sapwood in dead or wilting trees and inoculation experiments have shown it to be capable of causing wilting and xylem discoloration in several oak species, notably Quercus crispula and Q. serrata. In this study, we inoculated seedlings of six Fagaceae species with R. quercivora and, after 56 days, measured the vertical length of the discoloration and the areas of discoloured and non-conducting sapwood on stem cross-sections. The sapwood discoloration and the water non-conduction areas were larger in Q. crispula and Q. serrata than in the other species.