The role of macrosporin in necrotic spots

Macrosporin, a metabolite produced by a plant-pathogenic fungus Stemphylium lycopersici, was found to be a non-host selective toxin which plays a part in leaf necrosis. [Display omitted] ► Macrosporin proved to be a host non-selective toxin, which plays a role in leaf necrosis. ► Macrosporin, a metabolite produced by a plant-pathogenic fungus Stemphylium lycopersici. ► Macrosporin has photosensitizing ability. Macrosporin, a bioactive metabolite produced by a plant-pathogenic fungus Stemphylium lycopersici, was found to be a non-host selective toxin which plays a part in leaf necrosis, a disease caused by this fungus. Here, we discuss the role of this metabolite in necrotic spots, through the direct inoculation of the midribs of the leaves of a natural host, as well as its ability to generate active oxygen species, through the process of photosensitizing oxygen.