College of Life Sciences, Sichuan University, Chengdu, PR China. xutao@chgc.sh.cn|College of Life Sciences, Sichuan University, Chengdu, PR China. xutao@chgc.sh.cn|College of Life Sciences, Sichuan University, Chengdu, PR China. xutao@chgc.sh.cn|College of Life Sciences, Sichuan University, Chengdu, PR China. xutao@chgc.sh.cn