The mic1 mutant is characterized by reduced metal contents and morphology changes in vascular bundles. A, The V3 stage WT and mic1 seedlings grown in pots. Bar = 5 cm. B, Transverse sections showing veins of the mic1 and WT seedling leaves in the V3 stage. Bars = 100 μm. C, Chlorophyll content in leaves of the WT and mic1 mutant plants. D, Metal contents in leaves and roots of the WT and mic1 mutant plants. Values are means ± sd (standard deviation); n = 3 (**P < 0.01; ***P < 0.001; Student’s t test).