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Abstract
SUMMARY: The sulphur-containing amino acids L-cysteine, L-cystine, L-methionine, L-homocysteine thiolactone, L-homocystine and glutathione at 10−4 to 10−5 M inhibited sclerotial formation without inhibition of mycelial growth and induced basidia formation in the fungus Sclerotium rolfsii Sacc. Higher concentrations inhibited linear growth and production of sclerotia. The effect of L-cysteine was competitively antagonized by iodoacetic acid at a molar ratio of 30:1. Iodoacetic acid induced sclerotial formation at 3 x 10−5 to 10−4 M, sclerotia being produced in circles around inoculation point. The possible role of -SH groups in the morphogenesis of S. rolfsii is discussed.
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© Society for General Microbiology 1966