Xylella fastidiosa (Xf) is a xylem-limited quarantine phytobacterium representing a serious threat to European and Mediterranean agriculture and landscape, where outbreaks caused by strains belonging to three subspecies have been reported in Italy, France, Spain,...
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Pseudogenes and host specialization in the emergent bacterial plant pathogen Xylella fastidiosa
Pseudogenes are regarded as “junk” DNA, representing vestigial functions no longer needed for fitness. Accordingly, a higher number of pseudogenes in a bacterial human pathogen was previously hypothesized to be a hallmark of host specialists. In this study, we tested...
Century-old herbarium specimen provides insights into Pierce’s disease of grapevines emergence in the Americas
Fossils and other preserved specimens are integral for informing timing and evolutionary history in every biological system. By isolating a plant pathogen genome from herbarium-preserved diseased grapevine material from 1906 (Herb_1906), we were able to answer...
Phylogenomic analysis of Xylella fastidiosa subsp. pauca strains from olive and almond trees in Argentina
Xylella fastidiosa (Xf) is a Gram-negative bacterium that significantly threatens agricultural crops worldwide. In Argentina, severe symptoms resembling those of olive quick decline syndrome (OQDS) in Italy have been observed in Xf-infected olive orchards, primarily...
Multiple genotypes of a quarantine plant pathogen detected in New Zealand indigenous plants located in a botanical garden overseas
Xylella fastidiosa is a xylem-limited bacterial plant pathogen transmitted by insect vectors. It infects a wide range of plant species and causes devastating diseases. Botanical gardens are global repositories of plant diversity exposed to local biotic and abiotic...
Linking intercontinental biogeographic events to decipher how European vineyards escaped Pierce’s disease
Global change is believed to be a major driver of the emergence of invasive pathogens. Yet, there are few documented examples that illustrate the processes that hinder or trigger their geographic spread. Here, we present phylogenetic, epidemiological and historical...
Complete circularized genome resources for Xylella fastidiosa subsp. sandyi strains CO33 and CFBP8478
Xylella fastidiosa (Xf) is a vascular phytopathogenic bacterium native to the Americas, known for causing severe diseases and significant economic losses in important crops. In Europe, Xf is considered a quarantine pathogen. Since its first detection in 2013 in Italy,...
Complete genome assemblies of several Xylella fastidiosa subspecies multiplex strains reveals high phage content and novel plasmids
The Gram-negative bacterium Xylella fastidiosa (Xf) was originally found in the Americas, but has now been identified in more than 20 countries across America, Asia, and Europe. This plant pathogen is currently listed as a priority pest in Europe due to its...