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Phytophthora root and stem rot of soybean caused by the oomycete  Phytophthora sojae , is a destructive disease worldwide. Ethylene response factors (ERFs) play important roles in regulating plant biotic and abiotic stress tolerance. In this study, a new ERF gene,  GmERF113 , was isolated from the highly resistant soybean ‘Suinong 10.’ Sequence analysis suggested that the protein encoded by  GmERF113  contained a conserved AP2/ERF domain of 58 amino acid and belonged to the B-4 subgroup of the ERF subfamily. Expression of  GmERF113  was significantly induced by  P. sojae , ethylene, and methyl jasmonate. GmERF113 protein localized to the nucleus when transiently expressed in  Arabidopsis  protoplasts, could bind to the GCC-box, and acted as a transcription activator. In addition, a region of the full-length GmERF113, GmERF113-II, interacted with a basic helix-loop-helix transcription factor (GmbHLH) in yeast cells. Full-length GmERF113 also interacted with GmbHLH  in planta. GmERF113 -overexpressing transgenic plants in susceptible cultivar ‘Dongnong 50’ soybean exhibited increased resistance to  P. sojae  and positively regulated the expression of the pathogenesis-related genes,  PR1  and  PR10-1 . These results indicate that  GmERF113  may play a crucial role in the defense of soybean against  P. sojae  infection.

A Novel Soybean ERF Transcription Factor, GmERF113, Increases Resistance to Phytophthora sojae Infection in Soybean