Determination of lignin content in MdERF114 transgenic roots under Fusarium solani treatment. A) Determination of lignin content in MdERF114-overexpressing roots. B) Determination of lignin content in MdERF114-RNAi roots. WT-pBIN, GL3 transformed with an pBIN-GFP empty vector; OE 1–6, different MdERF114-overexpressing root lines. WT-pK7, GL3 transformed with an pK7GWIWG2 empty vector; RNAi 1–6, different MdERF114-RNAi root lines. Data are shown as means ± standard deviation (Sd) with three biological replicates. Different letters indicate significant differences between treatments based on Tukey's test (P < 0.05).