In rice, NH1 interacts with TGA2.1 transcription factor and negative regulator of resistance (NRR). TGA2.1 negatively regulates basal defense responses to Xoo (Fitzerald et al. 2005). Rice NRR negatively regulates SAR in Arabidopsis and basal and Xa21-mediated Xoo resistance in rice (Chern et al. 2005, 2008).