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Cell Wall-Degrading Enzymes Enlarge the Pore Size of Intervessel Pit Membranes in Healthy and Xylella fastidiosa-Infected Grapevines
The pit membrane (PM) is a primary cell wall barrier that separates adjacent xylem water conduits, limiting the spread of xylem-localized pathogens and air embolisms from one conduit to the next. T...
Cooperative efforts contained spread of Pierce's disease and found genetic resistance
An outbreak of Pierce's disease of grapevine in the Temecula Valley in the late 1990s was one in a decades-long series of sporadic appearances of this infection in California. However, the new outb...
Detection and visualization of an exopolysaccharide produced by Xylella fastidiosa in vitro and in planta
Many phytopathogenic bacteria, such as Ralstonia solanacearum, Pantoea stewartii, and Xanthomonas campestris, produce exopolysaccharides (EPSs) that aid in virulence, colonization, and survival. EP...
Genetic diversity of Pierce's disease strains and other pathotypes of Xylella fastidiosa
Strains of Xylella fastidiosa isolated from grape, almond, maple, and oleander were characterized by enterobacterial repetitive intergenic consensus sequence-, repetitive extragenic palindromic ele...
Identification of mechanisms mediating cold therapy of Xylella fastidiosa-infected grapevines
We are attempting to characterize the biochemical factors that mediate the cold curing phenomenon of grapevines infected with Xylella fastidiosa (Xf). We are working towards completing project obje...
Identification of Xanthomonas fragariae field isolates by rep-PCR genomic fingerprinting
Xanthomonas fragariae, the causal organism of angular leaf spot on cultivated strawberry (Fragaria x ananassa), is an economically important pathogen of nursery stock in California. The ability to ...
Inhibition of Xylella fastidiosa polygalacturonase to produce Pierce's disease resistant grapevines
Polygalacturonases (PG) (EC 3.2.1.15), catalyze the random hydrolysis of 1, 4-alpha-D-galactosiduronic linkages in pectate and other galacturonans. Xylella fastidiosa (Xf) possesses a single PG gen...
Insights into the Activity and Substrate Binding of Xylella fastidiosa Polygalacturonase by Modification of a Unique QMK Amino Acid Motif Using Protein Chimeras
Polygalacturonases (EC 3.2.1.15) catalyze the random hydrolysis of 1, 4-alpha-D-galactosiduronic linkages in pectate and other galacturonans. Xylella fastidiosa possesses a single polygalacturonase...
Localization and characterization of Xylella fastidiosa haemagglutinin adhesins
Xylella fastidiosa is a Gram-negative, xylem-inhabiting, plant-pathogenic bacterium responsible for several important diseases including Pierce's disease (PD) of grapevines. The bacteria form biofi...
The Xylella fastidiosa PD1063 Protein Is Secreted in Association with Outer Membrane Vesicles
Xylella fastidiosa is a gram-negative, xylem-limited plant pathogenic bacterium that causes disease in a variety of economically important agricultural crops including Pierce's disease of grapevine...
