Jane E. Harris, C. Dennis
Sep 1, 1976
Citations
0
Influential Citations
32
Citations
Journal
Physiologial Plant Pathology
Abstract
Abstract The antifungal activity of rishitin, phytuberin, anhydro-β-rotunol and solavetivone, metabolites produced in potato tubers in response to microbial infection, was tested against 10 potato pathogens and 3 non-potato pathogens. All of these compounds, except phytuberin, showed antifungal activity against the majority of the fungi when tested at 100 μg/ml, but the presence of organic nutrients in the test system decreased their activity in some cases. Pre-existing germ tubes of certain fungi were often more sensitive to the compounds than normal germ tubes. Phytuberin was only active against P. infestans, causing lysis of the zoospores similar to that caused by the other metabolites. None of the compounds were effective in inhibiting P. infestans and some non-potato pathogens when applied to leaf discs or used as protectant sprays.