Journal
PHYTOCHEMISTRY
Volume 66, Issue 1, Pages 81-87Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phytochem.2004.10.011
Keywords
Brassica napus; Canola; Sinapis alba; white mustard; Brassica juncea; brown mustard; Cruciferae; Leptosphaeria maculans; Phoma lingam; phytotoxin; 2-pyrones; polyketide biosynthesis
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The isolation and structure determination of phomapyrones D-G, three 2-pyrones and a coumarin, from a group of isolates of the fungal pathogen Leptosphaeria maculans (Desm.) Ces. et de Not., asexual stage Phoma lingam (Tode ex Fr.) Desm, is reported. As well,.phomenin B, infectopyrone, and polanrazines B and C were also obtained for the first time from these isolates. In addition, based on results of incorporations of C-13-labeled acetate and malonate, and deuterated methionine, a polyketide pathway is proposed for the biosyntheses of phomapyrones. (C) 2004 Elsevier Ltd. All rights reserved.
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