Verticillium-induzierte Umprogrammierung von Entwicklungsprozessen und Resistenz in Arabidopsis

• Antragsteller: Professor Dr. Volker Lipka
• Fachliche Zuordnung: Organismische Interaktionen, chemische Ökologie und Mikrobiome pflanzlicher Systeme
• Förderung: Förderung von 2014 bis 2019
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 255316173

• Erstellungsjahr: 2019

Zusammenfassung der Projektergebnisse

We identified a lineage-specific effector, LSCE2, which triggers de novo xylem formation in eudicot host plants of haploid Verticillium dahliae and allodiploid Verticillium longisporum isolates. Plants infected by these isolates do not show classical Verticillium wilting phenotypes, but instead exhibit enhanced drought tolerance due to elevated water storage capacities. The complex developmental reprogramming patterns induced by LSCE2 are restricted to plant bundle sheath, xylem parenchyma and cambium cells, suggesting cell-type specific target(s) and mechanism(s). Moreover, we identified abscisic acid (ABA) as a plant susceptibility factor that contributes to establishment of late phenotypes induced by chlorosis class Verticillium isolates. Notably, LSCE2-dependent reprogramming does not require ABA biosynthesis or signaling.

Projektbezogene Publikationen (Auswahl)

• “Identification of Arabidopsis genes involved in differential interaction phenotype establishment by distinct Verticillium isolates”, 12th International Verticillium Symposium in Ljubljana, 6.10.2016
  D. Stepanets
  
• “A single Verticillium dahliae effector induces de novo xylem formation in Arabidopsis leaves”, International Plant Immunity Symposium in Göttingen, 14.06.2018
  L. Weber