Figure 6From: Ectopic expression of MdSPDS1 in sweet orange (Citrus sinensis Osbeck) reduces canker susceptibility: involvement of H2O2 production and transcriptional alterationAnalysis of free polyamine contents in the wild type (WT) and transgenic line (TG9) after Xac infection. Free putrescine (A), spermidine (B) and spermine (C) contents (nmol/mg FW) were analyzed in the WT and TG9 leaves sampled on 1, 2 and 3 DPI. ** and *** indicate the values are significantly different compared with WT at significance level of P < 0.01 and P < 0.001, respectively.Back to article page