Fig. 4.

Effect of Si pre-treatment on Cd accumulation in lsi1, lsi2, and their wild types (WT1 for lsi1 and WT2 for lsi2). Seedlings (15 d old) pre-treated with or without 1 mM Si for 7 d were exposed to 1 µM Cd in the presence or absence of 1 mM Si for another 24 h. Shoots and roots were harvested for determination of Cd concentration and total accumulation was calculated based on biomass and Cd concentration. Data are means±SD (n=3). Different lower-case letters indicate significant difference at P<0.05 by Duncan’s test.