Grapevine (Vitis vinifera L.) is an economically important fruit crop grown worldwide. Grapevine is cultivated extensively in China, and certain wild grapes exhibit excellent resistance to pathogens and stress. MicroRNAs (miRNAs) act as key regulators of plant growth, development, and immunity
however, their functions in grape stilbene synthesis are poorly understood. We identified an miRNA (miR3398) that negatively regulates the transcription factor MYB15 and participates in the synthesis of stilbene from Vitis quinquangularis (V. quinquangularis). MiR3398 and VqMYB15 showed completely opposite expression patterns after AlCl