The soil fungus Talaromycesflavus (Klöcker) Stolk and Samson is an effective biological control for Verticillium wilt of eggplant (Solanummelongena L.), a disease caused by the fungus Verticilliumdahliae Kleb. The organic soluble metabolites produced when the fungus is grown in liquid still culture include D-glucono-1,4-lactone (1), 5-hydroxymethylfurfural (5), the previously unreported tetraketides, 4,6-dihydroxy-5-methylphthalide (3) and methyl 4-carboxy-5-hydroxyphthalaldehydate (8), a hexaketide, 7-hydroxy-2,5-dimethylchromone (6), and a metabolite believed to be 3-hydroxymethyl-6,8-dimethoxycoumarin (10). A number of higher order polyketides have been isolated including altenusin (11), dehydroaltenusin (12), and the previously unreported desmethyldehydroaltenusin (14). A structurally and biosynthetically interesting spirocyclic metabolite, which we have named talaroflavone (16), as well as a related compound, deoxytalaroflavone (18), have also been obtained. Keywords: Talaromycesflavus, fungal metabolites, talaroflavone, 4,6-dihydroxy-5-methylphthalide.
土壤真菌Talaromycesflavus(Klöcker)Stolk和Samson是茄子(Solanummelongena L.)青枯病的有效生物防治剂,该病是由真菌Verticilliumdahliae Kleb引起的。当真菌在液体培养基中生长时,产生的有机可溶代谢物包括D-葡萄糖酮-1,4-内酯(1)、5-羟甲基糠醛(5)、以前未报道的四酮类化合物4,6-二羟基-5-甲基邻苯二酸内酯(3)和甲基4-羧基-5-羟基邻苯醛缩醛(8)、六酮类化合物7-羟基-2,5-二甲基香豆素(6),以及一种被认为是3-羟甲基-6,8-二甲氧基香豆素(10)的代谢物。已分离出多种高级多酮类化合物,包括altenusin(11)、dehydroaltenusin(12)和以前未报道的desmethyldehydroaltenusin(14)。还获得了一种结构和生物合成有趣的螺环代谢物,我们将其命名为talaroflavone(16),以及一种相关化合物,deoxytalaroflavone(18)。关键词:Talaromycesflavus、真菌代谢物、talaroflavone、4,6-二羟基-5-甲基邻苯二酸内酯。