Inhibition of Microsclerotium Formation in Verticillium Dahliae by Thioglycolic Acid in Infected Cotton Stems
Sclerotia are small fungal reproductive bodies produced asexually from mycelial hyphae. They play a very important role in the life cycle of the fungi which produce them because they are the structures which survive through very long periods of unfavourable conditions in nature (Coley-Smich and Cooke 1971). The survival of many phytopathogenic soil fungi would be problematic if they were deprived of the ability to produce sclerotia. Sclerotial biogenesis can be inhibited by the use of certain sulfhydryl compounds such as mercaptoethanol, propyl- and butyl mercaptan, dithiothreitol, dithioerythritol, cysteamine hydrochloride (Christias 1975; Christias et al 1981; Christias 1978; Christias and Zioudrou 1983, 1984). This paper presents experimental data showing a strong inhibitory effect of thioglycolic acid on microsclerotium formation in pure culture as well as in the host plant.
KeywordsThioglycolic Acid Sulfhydryl Compound Sclerotium Formation Stem Piece Brown Discolouration
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