An oomycete effector that induces shade avoidance like growth and suppresses plant defenses targets the AUX/IAA protein IAA11

• DOI: 10.1101/2025.02.06.636700
• Publication Date: 2025-02-09T02:05:31Z
• Authors: Maria Florencia B...; Juan Marcos Lapeg...; Nicolás Tamagnone; Lucille Tihomirov...; Andrés Romanowski; Lennart Wirthmueller; Georgina Fabro
• Keywords: Oomycete

Filamentous pathogens, such as oomycetes, employ multiple strategies to suppress plant immunity, one of which involves manipulating phytohormone signaling pathways. The effector HaRxL106 from Hyaloperonospora arabidopsidis (Hpa), known induce shade avoidance syndrome (SAS)-like growth, has previously been shown interact with brassinosteroid components. Here, we investigate the role in altering auxin signaling, revealing that targets AUX/IAA protein IAA11, a key negative regulator responses. Our data suggest impedes repressive function enhancing and promoting SAS, concurrently suppresses immune These findings provide insights into how pathogen effectors manipulate growth immunity facilitate infection.