github link
Accession IconSRP009064

Transcription factor AbVf19 induces hydrolytic enzyme genes during pathogenesis in Alternaria brassicicola

Organism Icon Brassica oleracea
Sample Icon No Downloadable Samples
Technology Badge IconIllumina HiSeq 2000

Submitter Supplied Information

Alternaria brassicicola is a successful saprophyte and necrotrophic pathogen with a broad host range. It produces secondary metabolites that marginally affect virulence, in contrast to many A. alternata strains that produce secondary metabolites as host-specific pathogenicity factors. Cell wall-degrading enzymes (CWDEs) have been considered important for pathogenesis, but no CWDEs have been identified as significant virulence factors in A. brassicicola. In this study, we discovered mutants of a gene, AbVf19, which consistently produced smaller lesions than the wild type. The mutants grew slower than the wild type on an axenic medium with pectin as a major carbon source. Gene expression comparisons identified several hydrolytic enzyme-coding genes being down-regulated in the mutant during a late stage of infection. These down-regulated genes comprised a small fraction of genes within each family. Three of these genes had mutants that showed no or little change in virulence. This suggested that each down regulated gene only made a small contribution to virulence, or that their functions were redundant. This study demonstrated the existence and importance of a transcription factor that regulates a suite of genes that are probably important for decomposing and utilizing plant material during the late stage of plant infection. Overall design: gene expression profile comparisons between wild type and a transcription factor mutant during host infection
PubMed ID
Total Samples
Submitter’s Institution
No associated institution
Alternate Accession IDs


Show of 0 Total Samples
Accession Code
Specimen part
Processing Information
Additional Metadata
No rows found