Fig. 4From: Protocatechuic acid, ferulic acid and relevant defense enzymes correlate closely with walnut resistance to Xanthomonas arboricola pv. juglandisAverage lesion caused by Xaj in fruits at 16 dpi. The values are expressed as the mean ± standard deviation of three biological replicates. Letters indicated significant differences at a level of p < 0.05Back to article page