TY - Bulletin of Botanical Research A1 - WANG Li-Na, WANG Yu-Cheng, YANG Chuan-Ping T1 - The Comparative study of Callus and Direct Differation Regenaration System of 84K Poplar Y1 - 2017-07-15 JF - Bulletin of Botanical Research JO - Bulletin of Botanical Research SP - 542 EP - 548 VL - 37 IS - 4 UR - https://bbr.nefu.edu.cn N1 - 10.7525/j.issn.1673-5102.2017.04.009 ER -