Phylogenetic host range in the Botryosphaeriaceae.
Citation
Silva-Valderrama, I., Úrbez-Torres, J.R., and Davies, T.J. 2022. Phylogenetic host range in the Botryosphaeriaceae. Phytopathologia Mediterranea 61:356.
Résumé en langage clair
Botryosphaeriaceae is a diverse family composed of endophytes, pathogens, and saprobes, and is ubiquitous
in terrestrial plant biomes. Anthropogenic movement of some fungi, for example, on infected host material, is a
major concern, as the family includes species known to be pathogens in endophyte communities. In grapevines
(Vitis vinifera L.), Botryosphaeria dieback is an important grapevine trunk disease, causing severe economic
losses. Prevention of new infections remains the most effective disease management tool, but it is difficult to
identify highly virulent pathogen isolates before they emerge. Phylogenetics are useful tools for identifying
pathogens likely to shift to new hosts, and the potential for disease emergence following host jumps. However,
the taxonomy of Botryosphaeriaceae is in flux, and there is little phylogenetic information on the species infecting grapevines. The phylogeny of Botryosphaeriaceae species infecting V. vinifera was constructed, using molecular sequence data, and the link between host breadth and pathogen phylogenetic relatedness was explored. The distribution of Botryosphaeriaceae hosts across the megaphylogeny of vascular plants was outlined. Variation in host breadth was large among Botryosphaeriaceae pathogens, revealing the complex associations linking host and fungal phylogenies. This research provides a first step towards predicting emergence of known pathogens on new hosts. This approach will be useful for coordinated global monitoring of high-risk species within Botryosphaeriaceae.
Résumé
Botryosphaeriaceae is a diverse family composed of endophytes, pathogens, and saprobes, and is ubiquitous
in terrestrial plant biomes. Anthropogenic movement of some fungi, for example, on infected host material, is a
major concern, as the family includes species known to be pathogens in endophyte communities. In grapevines
(Vitis vinifera L.), Botryosphaeria dieback is an important grapevine trunk disease, causing severe economic
losses. Prevention of new infections remains the most effective disease management tool, but it is difficult to
identify highly virulent pathogen isolates before they emerge. Phylogenetics are useful tools for identifying
pathogens likely to shift to new hosts, and the potential for disease emergence following host jumps. However,
the taxonomy of Botryosphaeriaceae is in flux, and there is little phylogenetic information on the species infecting grapevines. The phylogeny of Botryosphaeriaceae species infecting V. vinifera was constructed, using molecular sequence data, and the link between host breadth and pathogen phylogenetic relatedness was explored. The distribution of Botryosphaeriaceae hosts across the megaphylogeny of vascular plants was outlined. Variation in host breadth was large among Botryosphaeriaceae pathogens, revealing the complex associations linking host and fungal phylogenies. This research provides a first step towards predicting emergence of known pathogens on new hosts. This approach will be useful for coordinated global monitoring of high-risk species within Botryosphaeriaceae.