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Effects of exogenous 1-naphthylphthalamic acid (NPA) and IAA on the Cd accumulation in Arabidopsis plants. Six-day-old seedlings were grown on 1/2 MS agar medium with 50 μM CdCl2 after 12 d of exposure to 2 μM NPA pulse SAY09 (+NPA+SAY09), SAY09 (+SAY09) or 0.05 μM IAA (+IAA) treatments. Then, these plants were used to analyze the phenotypes (A), chloroplast ultrastructure; Scale bar = 1 μm (B), and Cd deposition in the epidermis of leaves; Scale bar = 5 μm (C).
