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Notes: Phenol-Oxidizing Enzymes in the Heartwood of Pinus radiata

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Two phenol-oxidizing enzymes (o-diphenol:O2 oxidoreductase, EC No. and p-diphenol:O2 oxidoreductase, EC No. were found in fresh heartwood of Pinus radiata D. Don. Evidence suggests strongly that these enzymes were of host (rather than microbial) origin remaining active after necrosis of host parenchyma during heartwood formation. This could partly explain the decrease in free phenols and corresponding decrease in decay resistance which frequently occur as heartwood ages. Forest Sci. 19:153-155.

Keywords: Heartwood aging; decay resistance; heartwood formation

Document Type: News

Affiliations: Research Scientist, Division of Building Research, CSIRO, P.O. Box 310, South Melbourne, Victoria, Australia

Publication date: June 1, 1973

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  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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