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 Add this item to the list   Lenzites betulina L. ex Fries
Page number:342 
Description type:Culture description 
Description:Lenzites betulina L. ex Fries
Cultural characters: (PI. V, Fig. 2; Pl. VI, Figs. 37 and 38).
Growth characters. Growth rapid to moderately rapid, plates covered in' two to four weeks. Advancing zone even, in some isolates hyaline and appressed in narrow zone so that it is difficult to see limit of growth, in others with the slightly raised aerial mycelium extending to limit of growth. Mat white, the newest growth slightly raised, floccose-woolly, becoming patchy, with some areas raised, plateau-like, felty-woolly, very tough, the intervening areas appressed, thin felty, all peeling readily from agar, the mycelium frequently grown up sides and down between lid and base of Petri dish. Reverse unchanged. Odor lacking or slight. On gallic and tannic acid agars diffusion zones strong, no growth or only a trace on gallic acid agar, diameter 1.5-3.5 cm. on tannic acid agar.
Hyphal characters. Advancing zone: hyphae hyaline, nodose-septate, 2.2-4.5 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone; (b) fiber hyphae very numerous, with walls thick and refractive, lumina narrow or apparently lacking, aseptate, occasionally branched, 1.5-3.0 µm diameter. Submerged mycelium: (a) nodose-septate hyphae and (b) fiber hyphae as in aerial mycelium.
Type of rot: white rot of broad-leaved or, rarely, coniferous trees.
Descriptions of cultural characters: Badcock (3), Brodie (37), Cartwright and Findlay (52, 56), Davidson, Campbell, and Blaisdell (64), Vandendries (142, 143), Vandendries and Brodie (147, 148).
Lenzites betulina has key patterns identical with those of several other species, which makes its recognition in culture difficult. However, in all the cultures examined, nonstaining fiber hyphae were as plentiful in the submerged mycelium as in aerial mycelium, a condition that was not observed in other species. It is hoped that this will prove to be of diagnostic value.
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