Fig. 4

Phenotypes of GmMYB108-OE transgenic Arabidopsis plants. A Rosette-leaf morphology in 38-day-old (two upper panels) and 2 month-old (two lower panels) Arabidopsis plants. B Dissecting microscopy of the epidermis of the GmMYB108-OE transgenic Arabidopsis rosette leaves. The red mosaic cells were abundant in the anthocyanin-accumulating cells of GmMYB108-OE transgenic Arabidopsis plants (#1 and #9), but the red color was almost absent in the control (EV). C Content of secondary metabolites of anthocyanins, total flavonoids, and total phenolic compounds in GmMYB108-OE transgenic Arabidopsis plants (T₁ generation). The analyses were performed by spectrophotometric quantification. Total flavonoid content are expressed as micrograms of CAT equivalent per gram of FW (μg of CAT/g FW) and total phenolic content are expressed as micrograms of CGA equivalent per gram of FW (μg of CGA/g FW). The values are expressed as mean ± SD of two technical repeats