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Ⅰ、前言通过体细胞愈伤组织培养诱导小苗已在大量木本植物中做了尝试。许多研究者还报道了杨树体细胞愈伤组织形成小苗的成功事例。但是,通常愈伤组织的幼苗分化频率很
I. INTRODUCTION The induction of seedlings by somatic callus culture has been attempted in a large number of woody plants. Many researchers have also reported successful cases of poplar somatic callus forming shoots. However, callus differentiation is usually frequent in callus