[Fu, Jianmin; Wang, Lu; Feng, Yanzhi; Li, Fangdong] State Forestry Adm, Paulownia Res & Dev Ctr, Zhengzhou 450003, Henan, Peoples R China.
[Feng, Yanzhi; Tan, Xiaofeng; Zhang, Lin] Cent South Univ Forestry & Technol, Key Lab Cultivat & Protect Nonwood Forest Trees, Minist Educ, Changsha 410004, Hunan, Peoples R China.
[Mo, Wenjuan] Chinese Acad Forestry, Forestry Expt Ctr North China, Beijing 102300, Peoples R China.
[Cao, Heping] USDA ARS, So Reg Res Ctr, POB 19687, New Orleans, LA 70124 USA.