Affiliation: | (1) National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8569, Japan;(2) Faculty of Education, Ibaraki University, Mito, 310-8512, Japan;(3) Institute of Agricultural and Forest Engineering, University of Tsukuba, Tsukuba, 305-8572, Japan |
Abstract: | Methyl esters of higher fatty acids were detected from the healthy bark of Thujopsis dolabrata var. hondae but not from the bark of the resinous stem canker of T. dolabrata var. hondae. This difference enabled us to distinguish healthy trees from diseased ones. Fourteen diterpenes were also isolated from the n-hexane extracts of the bark-glued resin taken from the resinous stem canker of T. dolabrata var. hondae. Of these diterpenes, abietane diterpenes [abieta-7,13-diene (1), abietinol (2), dehydroabietinol (4)], pimarane diterpene [sandaracopimaric acid (8)], and labdane diterpenes [manool (10), torulosol (11), torulosal (12), cupressic acid (13)] were first isolated from T. dolabrata var. hondae.Part of this paper was presented at the 47th Annual Meeting of the Japan Wood Research Society, Tokyo, April 1999 |