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ERF transcription factors play critical roles in plant immune responses. Here, we report the function of AtERF014, a nucleus-localized transcriptional activator, in Arabidopsis immunity. Expression of  AtERF014  was induced by  Pseudomonas syringae  pv . tomato  ( Pst ) and  Botrytis cinerea  ( Bc ). AtERF014-overexpressing (OE) plants displayed increased  Pst  resistance but decreased  Bc  resistance, whereas AtERF014-RNAi plants exhibited decreased  Pst  resistance but increased  Bc  resistance. After  Pst  infection, expression of salicylic acid (SA)-responsive genes  AtPR1  and  AtPR5  in AtERF014-OE plants and of a jasmonic acid/ethylene-responsive gene  AtPDF1.2  in AtERF014-RNAi plants was intensified but expression of  AtPDF1.2  in AtERF014-OE plants and of  AtPR1  and  AtPR5  in AtERF014-RNAi plants was weakened. After  Bc  infection, expression of  AtPR1  and  AtPR5  in AtERF014-OE plants was attenuated but expression of  AtPR1 ,  AtPR5  and  AtPDF1.2  in AtERF014-RNAi plants was strengthened. Pathogen- and flg22-induced ROS burst, expression of PTI genes and SA-induced defense were partially suppressed in AtERF014-RNAi plants, whereas pathogen-induced ROS and flg22-induced immune response were strengthened in AtER014-OE plants. Altered expression of  AtERR014  affected expression of pectin biosynthetic genes and pectin content in AtERF014-RNAi plants was decreased. These data demonstrate that AtERF014 acts as a dual regulator that differentially modulates immunity against  Pst  and  Bc  in Arabidopsis.

Arabidopsis AtERF014 acts as a dual regulator that differentially modulates immunity against Pseudomonas syringae pv. tomato and Botrytis cinerea