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Rishitin, a known potato phytoalexin, was tested for its effects on proton transport. Like the pterocarpan phytoalexins, glyceollin and phaseollin, rishitin was found to inhibit proton transport. At 100 microM rishitin, proton transport in potato tonoplast vesicles was inhibited by > 95%. This
A beta-glucan isolated from the mycelial walls of Phytophthora megasperma var. sojae and a glucan purified from yeast extract stimulate the accumulation of phytoalexins in red kidney bean, Phaseolus vulgaris, and stimulate the accumulation of the phytoalexin, rishitin, in potato tubers, Solanum
Three unique classes of carbohydrates were isolated from the hyphal cell walls of Phytophthora megasperma f.sp. glycinea (Pmg) and compared with other substances for their activity as elicitors of the phytoalexin glyceollin in soybean tissues. Glucomannans extracted from cell walls with soybean