Ruolo del ferro in meccanismi di deterioramento del legno da fitopatogeni

Studio di meccanismi patogenetici di natura non enzimatica promossi da funghi tracheomicotici associati a mal dell’esca della vite, carie ed elefantiasi dell’actinidia, con particolare riferimento al ruolo del ferro.

How iron could be involved in esca fungi development by Stefano Di Marco — last modified 2007-11-27 17:04

Iron reduction capability was detected by ferrozine assay in Phaeomoniella chlamydospora, Phaeacremonium aleophilum and Fomitiporia punctata. On the other hand, the Chrome Azurol S (CAS) assay demonstrated that low molecular weight chelator agents were produced by P. chlamydospora, P. aleophilum, Libertella blepharis and F. punctata. Foliar analysis carried out at harvest showed higher levels of the iron in symptomatic than in asymptomatic leaves. Conversely, levels of the other transition metals (copper, manganese and zinc), however, and of calcium and magnesium were basically similar in symptomatic and asymptomatic leaves. A possible relationship between iron, esca fungi and host-plant was hypothesized.

Coinvolgimento del ferro nella degradazione della cellulosa causata da Phaeomoniella chlamydospora e Phaeoacremonium aleophilum, patogeni associati al mal dell’esca by Stefano Di Marco — last modified 2007-11-28 15:06

Ipotesi su processi non enzimatici di degradazione della cellulosa da parte di patogeni associati al mal dell'esca della vite verificati solo in presenza del ferro