Publications by authors named "Noemi Halbrendt"
RpoN is a σ(54) factor regulating essential virulence gene expression in several plant pathogenic bacteria, including Pseudomonas syringae and Pectobacterium carotovorum. In this study, we found that mutation of rpoN in the fire blight pathogen Erwinia amylovora caused a nonpathogenic phenotype. The E.
View Article and Find Full Text PDFBackground: Desirable apple varieties are clonally propagated by grafting vegetative scions onto rootstocks. Rootstocks influence many phenotypic traits of the scion, including resistance to pathogens such as Erwinia amylovora, which causes fire blight, the most serious bacterial disease of apple. The purpose of the present study was to quantify rootstock-mediated differences in scion fire blight susceptibility and to identify transcripts in the scion whose expression levels correlated with this response.
View Article and Find Full Text PDFArticle Synopsis
- The study investigates the virulence of six strains of the bacterium Erwinia amylovora, responsible for fire blight in apple and pear plants.
- Among the strains tested, HKN06P1 caused the most severe disease symptoms on apple trees and seedlings.
- Key virulence factors such as amylovoran production, biofilm formation, and growth in immature apple fruit were found to significantly influence disease severity, explaining over 70% of the variation in disease outcomes.