Expression patterns of untreated and treated Arabidopsis thaliana plants. Locally-damaged (LI) and systematically-damaged (SI) samples compared with corresponding untreated controls (H). A negative control hybridization was carried out using two untreated control samples. Diagonal red lines represent 2-fold and 3-fold induction/repression ratio cutoffs relative to the best fit line through the normalized data (middle black line).
Zhang et al. BMC Plant Biology 2012 12:234 doi:10.1186/1471-2229-12-234