Expression analysis of Arabidopsis LRR-RLK VIII gene in response to As stress. (a) Semi-quantitative RT-PCR analysis of LRR-RLK VIII genes in two Arabidopsis accessions after exposure to As stress. The details in annotation of these selected As tolerance-associated genes are summarized in Table 2. (b) RT-PCR analysis of LRR-RLK VIII genes in response to various stresses from Arabidopsis Col-0 accession. The plants were treated with As (100 and 200 μM), Cu (25 μM) and H2O2 (100 μM) for 3, 12 and 24 h. The data are on the basis of three biological replicates.