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