Compartmentalization of Discolored Wood in Heartwood of Red Oak

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Abstract
Discolored wood associated with holes drilled into heartwood of living red oak (Q. rubra) trees was strongly compartmentalized after 2 yr; discolored wood associated with similar holes in trees that were girdled immediately after wounding was weakly compartmentalized. Heartwood in red oak is not a dead, nonresponsive tissue; the classic concept that heartwood-rotting fungi grow unrestricted through heartwood is not true. The concept of heartrot must be revised to include compartmentalization.
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