The aim of this work was to characterize the secondary metabolite (SMs) profile of Stemphylium lycopersici , a necrotrophic fungus that causes the disease known as grey leaf spot. We detected twenty-four SMs in cultures of S. lycopercisi within the extracts of 19 isolates. Each of them presented a characteristic unique profile. While highly virulent isolates synthesized a high number of metabolites (15), the low virulent ones synthesized a low number of SMs (2). However, a PCA analysis could not establish the relationship between SMs and virulence. Infectopyrone was the most frequent metabolite produced by the isolates (89%).

中文翻译：

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Stemphylium lycopersici 的次生代谢物谱是番茄灰斑病的病原体，很复杂，包括宿主和非宿主特异性毒素

这项工作的目的是表征番茄干叶菌（Stemphylium lycopersici）的次生代谢物（SMs）特征，这是一种导致灰斑病疾病的坏死性真菌。我们在 S. lycopercisi 的 19 个分离株的提取物中检测到 24 个 SM。他们每个人都展示了独特的特征。虽然高毒力分离株合成了大量代谢物 (15)，但低毒力分离株合成了少量 SMs (2)。然而，PCA 分析无法确定 SM 与毒力之间的关系。Infectopyrone 是分离株产生的最常见的代谢物 (89%)。