title: Occurrence of zearalenols (diastereomeric mixture) in corn stalk rot and their production by associated fusarium species.
abstract: Zearalenol was extracted from Fusarium-infected stems of corn from southern Italy. The toxin, which appeared as a single compound in various thin-layer chromatography systems, was resolved by high-pressure liquid chromatography into two components. A gas chromatography-mass spectrometry examination of a purified fraction confirmed the natural occurrence of zearalenol as a diastereomeric mixture and led to the identification of alpha (56 ng/g) and beta (27 ng/g) isomers. Among nine Fusarium species found associated with stalk rot in corn, only Fusarium culmorum (F. roseum ;Culmorum') and F. equiseti (F. roseum ;Gibbosum') produced zearalenol and always produced it in a diastereomeric mixture of alpha and beta isomers.
authors.affiliation: Dipartimento di Patologia Vegetale dell'Universita degli Studi, 70126 Bari, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Bottalico
authors.forename: A
authors.initials: A
authors.lastname: Visconti
authors.forename: A
authors.initials: A
authors.lastname: Logrieco
authors.forename: M
authors.initials: M
authors.lastname: Solfrizzo
authors.forename: C J
authors.initials: CJ
authors.lastname: Mirocha