Ubiquitin-Conjugating Enzyme Positively Regulates Salicylic Acid and Jasmonic Acid Biosynthesis to Confer Broad-Spectrum Antiviral Resistance in <i>Nicotiana benthamiana</i>.

ABSTRACT: Ubiquitin-conjugating enzyme (UBC) plays a significant role in plant hormone signal transduction. In this study, we observed that TuMV infection markedly upregulates UBC mRNA expression, suggesting a close association between UBC and viral infection. Using Tobacco rattle virus (TRV)-based virus-induced gene silencing (VIGS) to downregulate UBC expression in Nicotiana benthamiana, we found that UBC-silenced plants exhibited enhanced susceptibility to TuMV compared with control plants. Conversely, transient overexpression of UBC protein suppressed viral propagation. Further analysis by reverse transcription quantitative PCR (RT-qPCR) revealed a substantial downregulation in the expression of SA and JA biosynthetic genes in UBC-silenced plants. Accordingly, liquid chromatography-tandem

SUBMITTER: Zhang X 

PROVIDER: S-EPMC12567447 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature