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Vascular bundles in men1/+ and ATHB15 transgenic plants. Transverse sections were stained with toluidine blue and observed under a bright- field microscope. Phc, phloem cap cell; P, phloem; Sx, secondary xylem; Mx, metaxylem; Px, Protoxylem; Ic, interfascicular cells. Scale bars are 5 μm.
