Pairwise comparisons of the expression profiles of putative orthologous cucumber and Arabidopsis WRKY genes under abiotic stresses. The relative expression of CsWRKY genes was obtained by real-time RT-PCR (indicated by triangles). Data are the means of three replicates with standard errors represented by bars. The CsWRKY expression data were compared with the mean-normalized expression data for their putative orthologous AtWRKY genes from a publicly available Arabidopsis microarray data set (indicated by circles) according to the description in Methods. The relative amount of mRNA (y-axis) was the ratio of treated to untreated sample. The treatment time (h) under the particular abiotic stress is presented on the x-axis. R indicates the correlation coefficient for expression between orthologs under the corresponding abiotic stresses. A distinct positive correlation was detected in most orthologs (A-D), but no obvious correlation was detected in group 3 orthologs (E-F). A negative correlation was detected in a small number of orthologs (G-H).
Ling et al. BMC Genomics 2011 12:471 doi:10.1186/1471-2164-12-471