Screening of a white-rot fungus with strong lignin degrading activity.
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概要
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The best strain (<I>Coriolus hirslits</I> IFO 4917 (in this paper, abbreviated as WR 28)) was screened out among 48 strains of white-rot fungi. The optimum pH and the optimum temperature were pH 4 and 33-36°C, respectively. The strain WR 28 was capable of decolorization of lignosulfonate. And lignins of hardwoods, especially poplar (<I>Populus trichocarpa</I> T. & G.) were considerably delignified, however, soft woods, used in this experiment were not delignified except Japanese red pine (<I>Picea resinosa</I> Ait.). With non-woods, the lignin of rice straw (<I>Oryza saliva</I> L.) was not decomposed at all. For manila hemp (<I>Musa texlilis</I> Nee L.) and bamboo (<I>Phylloslachys Sieb. el Zucc</I>.), the degrees of delignification were high (39.0% and 22.0%, respectively, for WR 28). As for WR 28, Bavendamm reaction was positive with several phenols such as Guaiacol, Benzidine, ο-Anisidine, α-Naphthylamine, 2, 5-Xylidine, o-Toluidine and Pyrogallol.<BR>Lignins of poplar and bagasse (<I>Saccharuni officinarum</I> L.) were decomposed to a degree of ca. 63% and ca. 80%, respectively, for 2 months.
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