title: Isolation and identification of hexaketides from a pigmented Monosporascus cannonballus isolate.
abstract: Monosporascus cannonballus causes severe production losses to muskmelon and watermelon in the United States and other countries. Wild types of the fungus produce no pigments when grown on potato dextrose agar (PDA). After long-term storage on soil/oat hull mix, however, some isolates of the fungus produce yellow to brown pigments and no perithecia when grown on PDA. Five colored metabolites from pigmented cultures of M. cannonballus isolate TX923038 have now been identified. Two of these, monosporascone and dehydroxyarthrinone, have been isolated from other fungi, and three, demethylcerdarin, monosporascol A and azamonosporascone, have not previously been reported. The (1)H NMR and (13)C NMR of all five compounds are reported.
authors.affiliation: South Central Agricultural Research Laboratory, ARS, USDA, Lane, Oklahoma 74555, USA. rdstip@cpru.usda.gov
authors.forename: Robert D
authors.initials: RD
authors.lastname: Stipanovic
authors.forename: Jiuxu
authors.initials: J
authors.lastname: Zhang
authors.forename: Benny D
authors.initials: BD
authors.lastname: Bruton
authors.forename: Michael H
authors.initials: MH
authors.lastname: Wheeler
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D010860:Pigments, Biological / Q000032:analysis* / Q000302:isolation & purification / Q000378:metabolism; D010935:Plant Diseases / Q000382:microbiology; D020037:Sordariales / Q000737:chemistry* / Q000472:pathogenicity
chemical_list: D010860:Pigments, Biological