The Single-Stranded DNA-Binding Gene () with a Strong Pathogen-Induced Promoter from Enhances Resistance to .

plants are disease-susceptible while plants are disease-resistant; however, the molecular mechanism remains unclear. In this study, the single-stranded DNA- and RNA-binding protein gene ( and ) were cloned from "Cabernet Sauvignon" and "HD1". and promoter sequences ( and ) were also isolated; however, the identity of the promoter sequences was far lower than that between the coding sequences (CDSs). Both gene sequences had seven exons and six introns, and they had a C-terminal Whirly conserved domain and N-terminal chloroplast transit peptide, which was then verified to be chloroplast localization. Transcriptional expression showed that was strongly induced by , while showed a low expression level. Further, the GUS activity indicated had high activity involved in response to infection. In addition, transiently expressing and enhanced the resistance. Moreover, , and were upregulated in transgenic leaves. This research presented a novel insight into disease resistance mechanism that promoted the transcription of , which subsequently regulated the expression of and , further enhancing the resistance to .