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6 Wood Discoloration

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8.5 Damage to Structural Timber Indoors 225<br />

Fig.8.21. Dry-rot fungi. Serpula lacrymans a Fruit body. b Detail. c Mycelium. d Strands.<br />

e Serpula himantioides fruit body; Leucogyrophana pinastri f Old fruit body. g Detail. h Old<br />

strands and sclerotia, iMyceliumand sclerotia.jYoungsclerotia.kLeucogyrophana mollusca<br />

fruit body. l Hair-like strands and sclerotia. m Mycelium and sclerotia; Leucogyrophana<br />

pulverulenta n Old fruit body, o Mycelium and strands (photos b–o:T.Huckfeldt)—5cm,<br />

---5mm<br />

the growth front and serve rather to transport nutrients to the hyphal margin.<br />

Alkaline materials to pH 10 can be overgrown, and alkalinity is decreased by<br />

excretion of liquid (pH 3–4) at the hyphal tip. An acute infection is often for<br />

a longer time not recognized due to the “hidden way of life”. Spores and still<br />

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