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Page number:257 
Description type:Culture description 
Description:Fomes lividus Kalchbr. (Pl. II & Pl. VIII, 16) Key Pettern: 1 1 1 1 5 1 2 2 2 2 1
GROWTH CHARACTERS.-Growth rapid, 3.7 cm in 1 week. Advancing zone hyaline, even, appressed. Mat white except in poroid areas where it is light brown to `drab grey' which gradually becomes darker with age. Some brown particles develop on the whole surface turning the colour• of the mat greyish after 5 weeks, appressed, subfelty becoming felty, cottony-woolly over the inoculum. Poroid surface developes within five weeks. Reverse light brown. Odour none.
Tests for extracellular oxidase positive; on gallic and tannic acid agars, diffusion zones moderately strong and weak respectively; growth 2.1 cm. on former and 2.5 cm. on latter, guaiacum reaction moderately strong.
HYPHAL CHARACTERS.-Advancing zone: hyphae hyaline, thin to slightly thickwalled, branched, nodose-septate, 1.5-3.8 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone; (b) fibre hyphae brown, thick-walled, branched, aseptate, 3.1-4.2 µm diameter; (c) chlamydospores hyaline, thin to slightly thick-walled, terminal, pear shaped, 10.7-12.3 µm x 6.1-7.211; (d) hyphae from poroid areas, brown, thin to slightly thick-walled, closely packed, interlocking, irregularly branched. Submerged mycelium: hyphae as in advancing zone and chlamydospores as in aerial mycelia.
CULTURES EXAMINED: FRI 27 and 415: Context cultures, isolated from 5578 on Shorea robusta Gaertn., causing white spongy rot.
Reference: Bagchee (1954).
The typical white felty mat which turns greyish at later stage characterises F. lividus. The fungus resembles F. melanoporus in colour and texture of the mat and in the presence of chlamydospores but can be separated from it by the presence of fibre and interlocking hyphae in F. lividus and their absence in F. melanoporus and high optimum temperature for growth which is 36°C in F. lividus and 33°C in F. melanoporus (Sehgal, Sen & Bakshi, 1966).
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