Air temperature is commonly used to represent plant thermal conditions, although temperatures within woody tissues and the soil–root zone can differ substantially under field conditions. This study characterized the thermal dynamics of xylem tissue and the soil–root...
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The hidden life of Xylella: mining the NCBI Sequence Read Archive reveals potential new species, host plants, and infected areas for this elusive bacterial plant pathogen
New crop disease outbreaks can occur when phytopathogenic bacterial pathogens acquire new traits, switch to a new host plant, or are introduced into new geographic areas. Therefore, the rapid detection of a pathogen in a new environment and/or in a new host plant is...
Isolation, Phylogenetic Inferences, and Early Diversification of Xylella fastidiosa subsp. fastidiosa in Cova da Beira Region, Portugal
The introduction of Xylella fastidiosa, a plant pathogen with a broad host range, poses a significant threat to agriculture and natural ecosystems. We analyzed six X. fastidiosa subsp. fastidiosa strains obtained from the Beira Interior region of Portugal, an area...
A pathogen of good taste: genetics of a bacterial host jump of the plant pathogen Xylella fastidiosa from coffee to wine grapes
When pathogens are repeatedly introduced into new environments, host jumps may occur into naïve taxa. Given the magnitude of the global plant trade, this process can lead to frequent disease emergence as interactions between previously isolated pathogens and new plant...
A marked sequential point process for disease surveillance: Modeling and optimization
Plant disease surveillance is essential for the management of disease outbreaks that pose significant threats to agricultural sustainability. In this study, we present a novel sequential point process model designed for disease surveillance. The model incorporates...
Complete genome assembly of Xylella fastidiosa subsp. fastidiosa (ST1) strains “BA_GR31” and “BA_AL21” associated with a new outbreak in Apulia, Italy
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,...
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...