from Foxtail Millet () Confers Transgenic Rice Tolerance to High Salt Stress in the Field.

Salt stress is a major threat to crop quality and yield. Most experiments on salt stress-related genes have been conducted at the laboratory or greenhouse scale. Consequently, there is a lack of research demonstrating the merit of exploring these genes in field crops. Here, we found that the R2R3-MYB transcription factor from foxtail millet is expressed mainly in the roots and is induced by various abiotic stressors such as salt, drought, low nitrogen, and abscisic acid. is tentatively localized to the nucleus and activates transcription. It enhances salt tolerance in transgenic rice at the germination and seedling stages. overexpression increased shoot height, grain yield, and salt tolerance in field- and salt pond-grown transgenic rice. overexpression promotes abscisic acid (ABA) accumulation in transgenic rice and upregulates the ABA synthesis gene and the ABA signal transduction pathway-related genes and . Thus, improves salt tolerance in transgenic rice by regulating ABA synthesis and signal transduction. Using rice heterologous expression analysis, the present study introduced a novel candidate gene for improving salt tolerance and increasing yield in crops grown in saline-alkali soil.