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Institut Sophia Agrobiotech

UMR INRA - Univ. Nice Sophia Antipolis - Cnrs

European Journal of Plant Pathology

26 October 2018

European Journal of Plant Pathology
© 2018 Springer Nature Switzerland AG. Part of Springer Nature.
Teratosphaeria stem canker disease on Eucalypt in Italy


The disease originally named as Coniothyrium canker was observed in Italy for the first time in late summer 2015. The outbreak involved several trees of a hybrid clone of E. camaldulensis × E. viminalis, and few E. camaldulensis trees, while the parental species E. viminalis as well as other eucalypts species, including E. grandis, did not show any symptoms. The pathogen was identified as Teratosphaeria gauchensis on the basis of morphological and molecular evidences, and Koch’s postulates were fulfilled. Bayesian phylogenetic analysis of the sole T. gauchensis strains based on four concatenated genes (ITS, β-Tub, TEF-1α, and ATP6) grouped all the Italian isolates together with those from Hawaii, Ethiopia in one paraphyletic group, which included a South-American subclade. A further Bayesian analysis based on two genes (ITS and TEF-1α) which included 81 sequences of closely related species besides T. gauchensisnamely, T. stellenboschiana and T. zuluensis, showed a certain level of variability within T. gauchensis clade in which T. stellenboschiana was nested. South-American strains confirmed to be high variable in both analysis. The outbreak of Teratosphaeria stem canker in Italy appears to be as a result of a recent introduction, from several independent introductions. This is consistent with the fact that the Italian isolates do not form a single monophyletic group but are interspersed by other geographical isolates.


Eucalyptus canker, Bayesian inference, Eucalyptus camaldulensis,Teratosphaeria gauchensis 

Vitale, S., Luongo, L., Danchin, E.G.J., Mughini, G., Gras, M., Galli, M., and Belisario, A. (2018). Teratosphaeria stem canker disease on Eucalypt in Italy. Eur J Plant Pathol. DOI: 10.1007/s10658-018-1577-6

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