Sterpuric acid is a phytotoxic metabolite derived from the fungus Stereum purpureum, from which it derives its name. This fungus causes silver-leaf disease of fruit trees.
Sterpuric acid disrupts plant cell membranes, leading to necrosis and the characteristic silvering of leaves. The fungus also produces other phytotoxic compounds, such as sterpurene, which contribute to its pathogenicity.
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