Secondary Metabolites from <i>Escovopsis weberi</i>
and Their Role in Attacking the Garden Fungus of Leaf-Cutting Ants
作者:Basanta Dhodary、Michele Schilg、Rainer Wirth、Dieter Spiteller
DOI:10.1002/chem.201706071
日期:2018.3.20
specialized, fungal pathogen Escovopsis weberi threatens the mutualistic symbiosis between leaf‐cutting ants and their garden fungus (Leucoagaricus gongylophorus). Because E. weberi can overwhelm L. gongylophorus without direct contact, it was suspected to secrete toxins. Using NMR and mass spectrometry, we identified several secondary metabolites produced by E. weberi. E. weberi produces five shearinine‐type
专门的真菌病原菌Escovopsis weberi威胁切叶蚁和其园林真菌(Leucoagaricus gongylophorus)之间的共生共生。由于E. weberi可以压倒L. gongylophorus没有直接接触,它被怀疑分泌毒素。使用NMR和质谱,我们确定了E. weberi产生的几种次生代谢产物。E. weberi生产五种剪力宁型吲哚三萜类化合物,包括两种新的衍生物,剪力宁L和剪力宁M,以及聚酮化合物,大黄素和环蒽酮。Cycloarthropsone和大黄素强烈抑制园林真菌L. gongylophorous。分别为0.8和0.7μmol。大黄素还对切叶蚁的链霉菌微生物共生菌(0.3μmol)具有活性。相反,在琼脂扩散测定中,Shearinine L不会影响L. gongylophorus的生长。但是,在双重选择行为分析中,Acromyrmex octospinosus蚂蚁在学习