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Effect of Si on Cd-induced inhibition of root elongation. Seedlings (5 d old) of lsi1, lsi2, and their wild types (WT1 for lsi1 and WT2 for lsi2) were exposed to different Cd concentrations for 24 h. The root length was measured by a ruler before and after exposure to Cd. Data are means±SD (n=10). Different lower-case letter indicates significant difference at P<0.05 by Duncan’s test.
