The hypervariable N-terminal of soybean mosaic virus P1 protein influences its pathogenicity and host defense responses

Abstract Soybean mosaic virus (SMV; Potyvirus , Potyviridae ) is one of the most prevalent and destructive viral pathogens in world. The P1 protein first N-terminal product potyvirus genome shows a high sequence variability that may be related to adaptation hosts. In this work, we focused on different functions proteins two SMV isolates GZL NB during their infection plants. Isolate induced weaker symptoms than mechanical inoculation assays, accumulation level CP -infected leaves was lower infected with especially at late stage infection. had similarity except for region. higher salicylic acid (SA) response Nicotiana benthamiana which explain titers plants . Our results suggest divergence these influenced virulence via differentially regulating SA signaling.