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Poplar R3 MYBs negatively regulate trichome formation in Arabidopsis. (A) Trichome phenotypes in Arabidopsis plants expressing poplar R3 MYB genes. All transgenic lines are in Col background. Pictures were taken from 2-week-old, soil-grown seedlings. (B) Trichome density on the first two rosettle leaves of Arabidopsis plants expressing PtrTCL4 and PtrTCL6. Data represent the mean±SD of 18 plants. *significantly different from Col wild-type plants (P < 0.001).
