title: How does SA signaling link the Flg22 responses?
abstract: Salicylic acid (SA) has a central role in activating plant resistance to pathogens. SA levels increase in plant tissue following pathogen infection and exogenous SA enhances resistance to a broad range of pathogens. To study the relevance of the SA signaling in the flg22 response, we investigated the responses of SA-related mutants to flg22, a 22-amino acid peptide of the flagellin bacterial protein. We identified SA as an important component of the flg22-triggered oxidative burst, a very early event after flg22 detection, and gene induction, an early event. SA acted partially by enhancing accumulation of FLS2 mRNA. We also provide new evidence that NPR1 play a role in SA-induced priming event that enhances the flg22-triggered oxidative burst, which is correlated with enhancement of the flg22-induced callose deposition. Based on these observations, we conclude that SA signaling is required for early as well as late flg22 responses.
authors.affiliation: a Plant Systems Engineering Research Center; Korea Research Institute Bioscience and Biotechnology (KRIBB) ; Yuseong-gu , Daejeon ; Republic of Korea.
authors.forename: So Young
authors.initials: SY
authors.lastname: Yi
authors.forename: Suk-Yoon
authors.initials: SY
authors.lastname: Kwon
mesh_terms: D017360:Arabidopsis / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000378:metabolism; D005408:Flagellin / Q000378:metabolism*; D020156:Salicylic Acid / Q000378:metabolism*; D015398:Signal Transduction
chemical_list: D029681:Arabidopsis Proteins; D005408:Flagellin; D020156:Salicylic Acid
keywords: Callose deposition; FLS2; FRK1; Flg22; Flg22-triggered oxidative burst; NPR1; SA; SA-mediated priming; SID2; WRKY29