In B73 (Fig. 1C), the expression of ZmWRKY21 was significantly reduced in response to wounding and inoculation at 3 DAI
compared to the non-treated control. However, this is likely due to the lack of enough replicates since the gene expression data at 3 DAI was fromonlyoneyearof sampling (2011) and high year to year variation may be present. In TZAR101 (Fig. 1D), there was a slight suppression in the wounded and inoculated treatment on the expression levels at 3 DAI compared to the non-treated control, but not significantly. For all remaining time points in both B73 and TZAR101, there were no significant differences in expression levels in response to any treatment (Table S3).