A downy mildew effector evades recognition by polymorphism of expression and subcellular localization
S. ASAI (1), V. Cevik (2), O. Furzer (2), N. Ishaque (2), K. Shirasu (1), J. Jones (2) (1) Center for Sustainable Resource Science, RIKEN, Japan; (2) The Sainsbury Laboratory, United Kingdom

Hyaloperonospora arabidopsidis (Hpa; formerly Peronospora parasitica) is an obligate biotrophic oomycete that causes downy mildew in Arabidopsis thaliana. The Arabidopsis-Hpa pathosystem has been extensively used to study host/pathogen co-evolution, and has enabled identification of cognate host resistance and pathogen avirulence genes. Arabidopsis Col-0 is resistant to Hpa isolates Emoy2 and Emwa1 through recognition by a resistance gene RPP4, but its cognate avirulence effector(s) were not previously identified. Comparative genomics and transcriptomics among different isolates of Hpa including Emoy2 and Emwa1 uncovered an Hpa effector recognized by RPP4. Here, we report how its unrecognised alleles evade immune recognition by RPP4.

Abstract Number: P12-394
Session Type: Poster