Effects of Heartwood Inhabiting Fungi on Thujaplicin Content and Decay Resistance of Western Redcedar (Thuja Plicata Donn.)

Authors

  • B. J. van der Kamp

Keywords:

Thujaplicin, decay resistance, western redcedar

Abstract

Western redcedar (Thuja plicata Donn.) outer heartwood blocks from a mature and an immature tree, inoculated with fungi commonly isolated from stained heartwood, had a thujaplicin content of less than 6% and a hot water solubility of about one-half that of controls after 10 weeks of exposure. Decay resistance of blocks from the mature tree was greatly reduced following exposure to the staining fungi. Naturally stained heartwood also had low thujaplicin content, but its decay resistance remained high in the same test.

References

Barton, G. M., and B. F. MacDonald. 1971. The chemistry and utilization of western redcedar. Dep. Fish. For., Can. For. Serv. Publ. No. 1023. 31 pp.nBritish Columbia Forest Service. 1957. Continuous forest inventory of British Columbia, 1957. Dep. Lands For., Victoria, B.C.nEades, H. W., and J. B. Alexander. 1934. Western redcedar: significance of its heartwood colourations. Forest Products Labs. Can., Cir. 41. 17 pp.nMacLean, H., and J. A. F. Gardner. 1956a. Analytical method for thujaplicins. Anal. Chem. 28:509-512.nMacLean, H., and J. A. F. Gardner. 1956b. Distribution of fungicidal extractives (thujaplicin and water soluble phenols) in western redcedar heartwood. For. Prod. J. 6(12):510-516.nRoff, J. W., and P. M. Atkinson. 1954. Toxicity tests of a water-soluble phenolic fraction (thujaplicin-free) of western redcedar. Can. J. Bot. 32(1):308-309.nvan der Kamp, B. J. 1975. The distribution of microorganisms associated with decay of western redcedar. Can. J. For. Res. 5(11):61-67.n

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Published

2007-06-28

Issue

Number 3 / July 1986

Section

Research Contributions

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