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 Add this item to the list   Polyporus brumalis Pers. ex Fries
   
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Page number:216 
Description type:Culture description 
Description:Polyporus brumalis Pers. ex Fries
Culture examined: FRI 585. Growth characters. - Rate of growth rapid, the radius at 1 week 5.4 cm. Advancing zone even, by aline and appressed. Mat at first appressed, raised, short-cottony to short-woolly, in some areas woolly-felty, sectored, white, after 2----3 weeks woolly-felty, thin-subfelty to felty, white, some compact felty to skinlike patches coloured `pinkish buff', `light ochraceous-buff', `vinaceousbuff' and `avellaneous', after 4-5 weeks skinlike areas increased, smooth to wrinkled, `vinaceous-buff' `avellaneous' and 'wood-brown', other areas remaining white, subfelty, thin-felty to felty. Reverse patchy, unchanged or after 2--3 weeks slightly bleached. Odour faint.
Tests for extracellular oxidase positive: on gallic acid agar diffusion zones strong and no growth; on tannic acid agar diffusion zones strong, diameter 4.0 cm; with guaiacum reaction very strong.
Hyphal characters. - Advancing zone; hyphae hyaline, thin-walled, nodose-septate, branched, 1.8-4.3 µm in diameter. Aerial mycelium: (a) hyphae as in advancing zone; (b) fibre hyphae numerous, with walls thick and refractive, lumina narrow to apparently lacking, aseptate, sparingly to profusely branched, 1.2-3.0 µm in diameter; (c) hyphae from skinlike areas nodoseseptate, branched with numerous short branches and knoblike projection!, se compactly interlocked that it is almost impossible to separate them; (d) chlamydospores rare, intercalary or terminal, slightly thick-walled, 3.6-18.3 x 2.5-9.8 µm. Submerged mycelium: (a) hyphae as in advancing zone; (b) chlamydospores as in aerial mycelium, fairly common.
The fungus has been described in culture by Nobles (1948), who did not mention the occurrence of chlamydospores which have been observed in the present isolate.
It resembles closely P. arcularius in culture from which it can he distinguished by the lighter colour of the mat only.

 
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