✍ Scribed by R. F. Sharp
No coin nor oath required. For personal study only.
Veneers treated with subtoxic levels of a copper containing wood preservative were inoculated with various fungi and soil and incubated in the laboratory in such a way that hyphae could grow away from the wood. Afterwards any copper moved out of the wood was measured. Every culture tested formed mycelium which moved some copper, and species known to be copper tolerant gave the greatest movement of the metal away from the wood. The amounts invariably increased with time and no distinct adaptation to the toxicant, involving a lag phase before copper movement occurred, could be discerned. Copper was distributed evenly wherever hyphae grew. The amounts varied with different temperatures, pH's and preservative concentration and reflected the growth response of the cultures to these parameters. The monocultures did not considerably move more copper from one kind of wood, though the soil fungi were always most active on Scots pine. The copper which was moved appeared to be that not fixed in the wood. Generally the results indicated that the movement of copper was by a translocation mechanism linked to fungal growth.
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