Enhanced Resistance of against pv. Suggests Negative Regulation of Plant Basal Defense and Systemic Acquired Resistance by Encoding NAD(P)-Binding Rossmann-Fold in .

Nitric oxide (NO) regulates several biological and physiological processes in plants. This study investigated the role of (), encoding an NAD(P)-binding Rossmann-fold superfamily, in the growth and immunity of . was pooled from the CySNO transcriptome as a NO-responsive gene. Seeds of the knockout () and overexpression plants were evaluated for their response to oxidative [(hydrogen peroxide (HO) and methyl viologen (MV)] or nitro-oxidative [(S-nitroso-L-cysteine (CySNO) and S-nitroso glutathione (GSNO)] stress. Results showed that the root and shoot growth of (KO) and (OE) exhibited differential phenotypic responses under oxidative and nitro-oxidative stress and normal growth conditions. To investigate the role of the target gene in plant immunity, the biotrophic bacterial pathogen pv. DC3000 virulent ( DC3000 ) was used to assess the basal defense, while the DC3000 avirulent (B) strain was used to investigate -gene-mediated resistance and systemic acquired resistance (SAR). Data revealed that negatively regulated basal defense, -gene-mediated resistance, and SAR. Furthermore, the eFP browser indicated that the expression of is detected in several plant organs, with the highest expression observed in germinating seeds. All results put together suggest that could be involved in plant growth, as well as basal defense and SAR, in response to bacterial pathogens in .