Fig. 7.

A hypothetical model illustrating how the transcription factor GmMYB173 regulates the expression of target gene GmCHS5 during soybean response to salinity. After the perception of salinity signal, the GmMYB173 is phosphorylated by casein kinase II and then activates the transcription of downstream target genes including GmCHS5. These enzymes catalyze the production of dihydroxy B-ring flavonoids (such as cyanidin 3-arabinoside chloride), and the accumulation of these flavonoids help reduce the ROS and the establishment of soybean tolerance to salinity.