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栝楼初生根静止中心的研究
吴树明;   
南开大学生物系
摘要:
用~3H-胸腺嘧啶核苷处理栝楼(Trichosanthes kirilowii Maxim.)初生根不同生长阶段的根尖,并用放射自显影技术测定根尖静止中心的存在。在各个生长阶段中,静止中心缺乏标记的细胞核。在生长过程中,静止中心的体积发生变化;静止中心所在部位也有发展。最初仅占中柱顶端和皮层顶端最内层的部分。当根长大时;静止中心扩大到皮层比较靠外的部分,但静止中心从来不越过次生冠轴原始细胞。
关键词:  栝楼  初生根  静止中心  
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