A novel ethylene-responsive factor IbERF4 from sweetpotato negatively regulates abiotic stress. - Yu, Yang; Kim, Ho Soo; Ma, Peiyong; Jia, Zhaodong; Guo, Xiaoding; Xie, Yizhi; Kwak, Sang-Soo; Zhang, Peng; Bian, Xiaofeng (Plant Biotechnology Reports, 2020)