OXI1 Kinase Is Necessary for Oxidative Burst-Mediated Signaling in Arabidopsis

    February 2004 in “ Nature ”
    Maike Rentel, Fatma Lecourieux, Fatma Ouaked, Sarah Usher, Lindsay N. Petersen, Haruko Okamoto, Heather Knight, Scott C. Peck, Claire Grierson, Heribert Hirt, Marc R. Knight
    TLDR OXI1 kinase is essential for plant defense and root hair growth in Arabidopsis.
    The study demonstrated that the OXI1 gene in Arabidopsis thaliana, which encodes a serine/threonine kinase, was crucial for oxidative burst-mediated signaling. OXI1 expression and kinase activity were induced by H2O2, and it was necessary for the activation of MAPKs MPK3 and MPK6 following AOS or elicitor treatment. OXI1 played a vital role in two distinct AOS-mediated processes: providing basal resistance to Peronospora parasitica infection and promoting root hair growth, highlighting its importance in the signal transduction pathway that connects oxidative signals to various downstream responses.
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