Nematode-antagonistic trichothecenes from Fusarium equiseti

Citation
Jk. Nitao et al., Nematode-antagonistic trichothecenes from Fusarium equiseti, J CHEM ECOL, 27(5), 2001, pp. 859-869
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
JOURNAL OF CHEMICAL ECOLOGY
ISSN journal
0098-0331 → ACNP
Volume
27
Issue
5
Year of publication
2001
Pages
859 - 869
Database
ISI
SICI code
0098-0331(200105)27:5<859:NTFFE>2.0.ZU;2-1
Abstract
A strain of the fungus Fusarium equiseti isolated from soybean cyst nematod e secretes nematode-antagonistic compounds. Bioassay-guided fractionation o f an extract of the culture broth was undertaken to identify the compounds. Fractions were assayed for activity against a root-knot nematode (Meloidog yne incognita), a plant pathogen that attacks the roots of numerous plant s pecies. Two trichothecene compounds were isolated that inhibited egg hatch and immobilized second-stage juveniles of this nematode: 4,15-diacetoxy-12, 13-epoxy-3,7-dihydroxytrichothec-9-en-8-one (4,15-diacetylnivalenol) and 4, 15-diacetoxy-12,13-epoxy-trichothec-9-en-3-ol (diacetoxyscirpenol). This is the first published report of these compounds affecting plant-parasitic ne matodes.