Publications by authors named "P E Rolshausen"
Huanglongbing (HLB), associated with the psyllid-vectored phloem-limited bacterium, Candidatus Liberibacter asiaticus (CLas), is a disease threat to all citrus production worldwide. Currently, there are no sustainable curative or prophylactic treatments available. In this study, we utilized mass spectrometry (MS)-based metabolomics in combination with 3D molecular mapping to visualize complex chemistries within plant tissues to explore how these chemistries change in vivo in HLB-infected trees.
View Article and Find Full Text PDFWe sequenced and comprehensively analysed the genomic architecture of 98 fluorescent pseudomonads isolated from different symptomatic and asymptomatic tissues of almond and a few other Prunus spp. Phylogenomic analyses, genome mining, field pathogenicity tests, and in vitro ice nucleation and antibiotic sensitivity tests were integrated to improve knowledge of the biology and management of bacterial blast and bacterial canker of almond. We identified Pseudomonas syringae pv.
View Article and Find Full Text PDFGrapevine trunk diseases are caused by a broad diversity of fungal taxa that have serious impacts on the worldwide viticulture industry due to significant reductions in vineyards yield and lifespan. Field surveys carried out from 2018 to 2022 in California nurseries and young vineyards revealed a high incidence of . Since species are important pathogens of other perennial crops, the present study aimed to identify and determine the pathogenicity of the species on grapevines.
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- The study investigates the role of various pathogenic ascomycete fungi in grapevine diseases, focusing on Eutypa dieback, Botryosphaeria dieback, and Esca, highlighting differences in symptoms and damage among trunk pathogens.
- Researchers sequenced 50 isolates globally and created pangenomes to explore genomic diversity and the presence of virulence factors, finding significant variations in gene distribution related to pathogenicity across different species.
- Key findings revealed that carbohydrate active enzymes were common in the core genomes, while biosynthetic gene clusters and virulence factors were found in the dispensable genomes, illustrating the complex genomic adaptations of these pathogens.
Grapevine Trunk Diseases (GTD) are caused by a consortium of fungal pathogens that affect the biological functions of the vascular system of mature and young grapevines (Gramaje et al. 2018). We conducted surveys to profile GTD pathogens in California grapevine nurseries and collected 784 cuttings of cvs.
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