title: Effects of phenylthiourea on growth and sclerotial formation of Sclerotium rolfsii and Whetzelinia sclerotiorum.
abstract: The growth of Sclerotium rolfsii and Whetzelinia sclerotiorum was reduced when 5 X 10(-4) to 2 X 10(-3) M 1-phenyl-2-thiourea (PTU) was incorporated into synthetic media and potato dextrose agar (PDA). Whetzelinia sclerotiorum produced heavy aerial mycelia and few, if any, sclerotia in synthetic glucose-nitrate liquid medium containing 10(-3) and 2 X 10(-3) M PTU. At the same PTU concentrations in PDA. W. sclerotiorum formed abnormal sclerotia covered with a yellowish green exudate. Sclerotium rolfsii produced unusual patterns of aerial mycelia and no sclerotia on media containing 2 X 10(-3) M PTU. With 5 X 10(-4) M PTU, S. rolfsii produced sclerotial initials and some of these developed into atypical clumps of sclerotia. A yellow pigment developed when S. rolfsii grew on media containing PTU.
mesh_terms: D001203:Ascomycota / Q000254:growth & development*; D003904:Mitosporic Fungi / Q000187:drug effects / Q000254:growth & development*; D009024:Morphogenesis / Q000187:drug effects; D010670:Phenylthiourea / Q000494:pharmacology*
chemical_list: D010670:Phenylthiourea