Morphological Mutant of Rhizoctonia solani and Its Cell Wall Component
1986 年 50 巻 4 号 p. 915-921
詳細
1986 年 50 巻 4 号 p. 915-921
The perfect stage of Rhizoctonia solani Kühn R-44 (Thanatephorus cucumeris) was confirmed by microscopic observation of basidiospores after three successive single spore isolations. A morphological mutant, ML-19, was induced by UV-light irradiation of a mycelial-fragment suspension from a single basidiospore culture of the fourth generation, and characterized.
Different from in the cases of some kinds of morphological mutants of Neurospora, the morphology of this mutant was not responsible for conditional morphologicals, such as choline, inositol, linolenic acid and cAMP or hyphal extension factor.
The characterization of the cell wall by fractionation, acid hydrolysis, Smith degradation and methylation analysis revealed that fraction III (glycan fraction) was composed of 1, 3-glucomannan containing small amounts of pentoses. The major difference in the fractions III from the original strain and the mutant was the change in the glucose/mannose ratio from 5/3 to 10/3.
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