The Arabidopsis chromatin regulator MOM1 is a negative component of the defense priming induced by AZA, BABA and PIP

• DOI: 10.3389/fpls.2023.1133327
• Publication Date: 2023-05-09T05:34:20Z
• Authors: Julián O. Miranda...; Micaela Y. Peppin...; Ignacio Lescano L...; Damián Alejandro ...; María E. Alvarez; Nicolás M. Cecchini
• Keywords: Component (thermodynamics); Priming (agriculture); Negative regulator

In plants, the establishment of broad and long-lasting immunity is based on programs that control systemic resistance immunological memory or “priming”. Despite not showing activated defenses, a primed plant induces more efficient response to recurrent infections. Priming might involve chromatin modifications allow faster/stronger activation defense genes. The Arabidopsis regulator “ Morpheus Molecule 1 ” (MOM1) has been recently suggested as priming factor affecting expression immune receptor Here, we show mom1 mutants exacerbate root growth inhibition triggered by key inducers azelaic acid (AZA), β-aminobutyric (BABA) pipecolic (PIP). Conversely, complemented with minimal version MOM1 ( miniMOM1 plants) are insensitive. Moreover, unable induce against Pseudomonas sp. in these inducers. Importantly, AZA, BABA PIP treatments reduce expression, but transcript levels, tissues. Consistently, several MOM1-regulated genes upregulated during WT while this effect observed . Taken together, our results position negatively regulates induced PIP.