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 Add this item to the list  Polyporus xanthopus Fries
Page number:238 
Description type:Culture description 
Description:Polyporus xanthopus Fries
Cultures examined: FRI 174, 773: Polysporous, Isolated from M. 526 and 7725 on dead Shorea robusta Gaertn., causing white rot.
Growth characters. - Rate of growth moderately rapid, the radius at 1 week 2.1-2.5 cm; at 2 weeks 4.8-5.1 cm; at 3 weeks 7.0-7.5 cm. Advancing zone even, slightly raised aerial mycelium extending to lirait of growth. Mat chalky white, at first slightly raised to short cottony in the newer growth, subfelty to floccose-felty in the middle zone and felty in the older growth, after 3--6 weeks felty to pelliculose, somewhat zonate. Reverse unchanged or after 4-6 weeks slightly bleached. Odour none.
Tests for extracellular oxidase positive: on gallic acid agar diffusion zones strong, diameter 1.7-3.0 cm; on tannic acid agar diffusion zones moderately strong, diameter 3.0-4.5 cm; with guaiacum reaction strong.
Hyphal characters. - Advancing zone: hyphae hyaline, thin-walled, nodose-septate, branched, 1.5-4.9 µm in diameter. Aerial mycelium: (a) hyphae as in advancing zone; (b) fibre hyphae numerous, with walls thick and refractive, lumina narrow to fairly broad, unbranched to sparingly branched (cf. to skeletal hyphae of fruit-body) or much branched with many short branches (cf. to binding hyphae of fruit-body), 1.2-3.0 µm in diameter. Submerged mycelium: hyphae as in advancing zone.
This fungus is characterised in culture by white mat winch is felty to pelliculose after 3-6 weeks, and positive tests for extracellular oxidase. The optimum temperature for growth is 30°C.

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