1 MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 73000, China. Electronic address: qiuqsh@lzu.edu.cn.
2 MOE Key Laboratory of Forage and Endemic Crop Biotechnology, School of Life Sciences, Inner Mongolia University, Hohhot, 010071, China. Electronic address: qizhi@imu.edu.cn.