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Histological features of WT, 35S:MdMIR156a6, and 35S:MIM156 tobacco stems during adventitious root formation. Toluidine Blue-stained cross-section of the stem of WT, 35S:MdMIR156a6, and 35S:MIM156 at 0, 3, and 6 d after subculture on MS medium. Arrows indicate initial emerging adventitious roots and adventitious root primordia. Scale bars = 200 μm.
