test_moissonnage_selune
type: Agent

Interaction between sunflower plants and five isolates of Plasmopara halstedii on the level of pathogenicity
type: Dataset
contact point: Organization
  fn: CCSD
keyword: journal-articles
keyword: infoeu-reposemanticsarticle
keyword: aggressiveness
keyword: quantitative-resistance
keyword: helianthus-annuus
keyword: sdvsalife-sciences-q-bioagricultural-sciences
keyword: qualitative-resistance
keyword: virulence
keyword: downy-mildew
landing page: 1742-9145
description: The interaction between sunflower plants showing a high level of quantitative resistance and five Plasmopara halstedii (the causal agent of downy mildew) isolates of several races were studied using five single zoosporangium isolates per pathogen isolate. Aggressiveness criteria were analyzed for 25 P. halstedii single zoosporangium isolates. Based on the reaction for the P. halstedii isolates to four sunflower hybrids H1-H4 varying only in their downy mildew resistance genes, there were differences in virulence spectrum in pathogen isolates. Analysis of five single zoosporangium isolates for P. halstedii isolates showed significant variability within pathogen isolate for all aggressiveness criteria but not for all pathogen isolates. The hypothesis explaining the interaction between P. halstedii and its host plant was discussed on the level of pathogenicity.
issued: 2026-05-05T21:39:21.449557
language: en
modified: 2026-05-05T21:39:21.449562

Interaction between sunflower plants and five isolates of Plasmopara halstedii on the level of pathogenicity
type: Distribution
access URL: https://hal.science/hal-00964372
format: HTML
issued: 2026-05-05T21:39:21.456797
modified: 2026-05-05T21:39:21.438374