Tenuazonic acid (TeA), a putative nonhost‐selective mycotoxin isolated from Alternaria alternata, is the main causative agent of brown leaf spot disease of crofton weed (Ageratina adenophora) and some other crops. Previous studies revealed that it is a natural photosystem II inhibitor that binds the D1 protein to block electron transfer. Though the crude metabolite extract of A. alternata containing TeA has been bioassayed, the herbicidal activity of synthesized TeA has not been systematically evaluated yet.

中文翻译：

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棉花中潜在的生物基除草剂替奴嗪酸的评估

Tenuazonic酸（TeA）是一种从Alternaria alternata分离出的非宿主选择性霉菌毒素，是crofton杂草（Ageratina adenophora）和其他一些农作物的褐叶斑病的主要病原体。先前的研究表明，它是一种天然的光系统II抑制剂，可与D1蛋白结合以阻止电子转移。虽然粗代谢物提取物A.孢含茶已生物测定，合成茶的除草活性尚未得到系统还评价。