Abstract
Phytophthora infestans excretes an endo-β-1,3-, an endo-β-1,4-, and aβ-1,3-glucanase (laminarinase), aβ-1,6-glucosidase and possibly small amounts of aβ-1,4-glucosidase. Ether extracts from the infected resistant cultivar Eba but not from the susceptible Bintje inhibited growth of the parasite. Solavetivone and rishitin, two phytoalexins, and the steroid glycoalkaloid tomatine inhibited growth of the fungus and also activities of some of the fungal glucanases, whereas phytuberin, another phytoalexin, and the two phenolic compounds scopoletin and chlorogenic acid inhibited neither fungal growth nor fungal glucanases. The phytoalexin lubimin strongly reduced fungal growth but did not reduce the activities of any of the fungal glucanases tested. A potential role for host derived fungal glucanase inhibitors as factors of resistance in thePhytophthora-potato system is discussed.
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Stössel, P., Hohl, H.R. Effect of phytoalexins on hyphal growth and β-glucanases of Phytophthora infestans. Mycopathologia 73, 153–159 (1981). https://doi.org/10.1007/BF00575086
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DOI: https://doi.org/10.1007/BF00575086