Phytotoxic Metabolites ofPhoma Sorghina, A New Foliar Pathogen of Pokeweed
作者:
VenkatasubbaiahP.,
DykeC. G. Van,
ChiltonW. S.,
期刊:
Mycologia
(Taylor Available online 1992)
卷期:
Volume 84,
issue 5
页码: 715-723
ISSN:0027-5514
年代: 1992
DOI:10.1080/00275514.1992.12026197
出版商: Taylor&Francis
关键词: epoxydon;Phoma sorghina;pokeweed;secondary metabolites
数据来源: Taylor
摘要:
ABSTRACTPhoma sorghinais a newly described leaf spot pathogen on pokeweed. The fungus produced six Phytotoxins in liquid culture which were isolated and structurally identified as 6-methylsalicylic acid, epoxydon, desoxyepoxydon, phyllostine, 2,3′-dihydroxy-4-methoxy-5′,6-dimethyl diphenylether, and epoxydon 6-methylsalicylate ester. The cell-free culture filtrate and all six toxins caused necrosis when spotted on pokeweed leaves and eight other weed species thus all six toxins were nonspecific Phytotoxins. Epoxydon, desoxyepoxydon and the diphenylether showed strong antimicrobial properties against all bacteria and fungi tested. 6-Methylsalicylic acid, epoxydon and the diphenylether also inhibited sorghum root growth.
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