Fig. 6

Relative expression levels of genes from C. sinensis (a-j) and C. grandis (k-t) roots. Relative abundances of genes encoding ATP sulfurylase 1 (ATPS1, gi|281426908; a and k), probable glutathione peroxidase 4 (GPX 4, gi|75154467; b and l), oxalate oxidase 2 (OXO 2, gi|1171937; c and m), O-acetylserine (thiol)lyase (cysteine synthase), partial (gi|34099833; d and n), catalase (gi|378724814; CAT, e and o), blue copper protein (gi|21264375; f and p), glyoxylase I, partial (gi|301341860; g and q), glutathione transferase (GST), partial (gi|380863042; h and r), peroxidase (POD, gi|110007377; i and s) and hydroxyacylglutathione hydrolase (Glyoxylase II, gi|3913733; j and t) in Al-toxic and control roots revealed by qRT-PCR. Bar represents the mean ± SE (n = 3). Unpaired t-test was applied for comparision between means. Different letters above the bars indicate a significant difference at P < 0.05. All the values were expressed relative to the control roots