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引言从雷林一号桉树(Eucalyptus“leichow”“№:1”)46号、9号优树种子或无菌苗产生的愈伤组织,诱导发生的胚性细胞团,颜色深红,凸凹不平,表层湿润,结构紧密,呈颗粒状。继代培养,以10至30倍增殖,生活力极为旺盛,分化出许多胚状体。在同一块胚性细胞团中,观察到分生中心、原胚、球形胚、心形胚、鱼雷形胚以及子叶形胚等不同步的胚状体。两极性明显,根芽齐全,苗木健壮,移栽成活90％以上。目前,植物组织培养已成为一种非常有用的研究手段,在实际应用方面也同样有着重要意义。据1978年资料统计,在组织培养中具有胚状体分化能力的种子植物已达
Introduction Callus induced from Eucalyptus “leichow” “No: 1” No.46, No.9 superior tree seeds or sterile seedlings induces embryogenic cell mass with dark reddish color and irregularities , Surface moist, compact structure, granular. Subculture, to 10 to 30 times proliferation, vitality is extremely strong, many embryoid body differentiation. In the same embryogenic cell mass, asynchrony such as meristematic center, primitive embryo, globular embryo, heart embryo, torpedo embryo and cotyledon embryo were observed. Obvious bipolar, root and shoot complete, robust seedlings, transplanting survival of more than 90%. At present, plant tissue culture has become a very useful research tool, which is also of great significance in practical application. According to the statistics of 1978, seed plants with embryoid body differentiation ability in tissue culture have reached