Jing Li, Guanghui Guo, Weiwei Guo, Ganggang Guo, Dan Tong, Zhongfu Ni, Qixin Sun and Yingyin Yao*
* Corresponding author: Yingyin Yao yingyin@cau.edu.cn
BMC Plant Biology 2012, 12:220 doi:10.1186/1471-2229-12-220