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本世纪初，德国植物学家成功地培养出植物细胞，发现能够从植物细胞培养出幼小的植物。植物体内成熟的细胞怎么会长出一棵小植物来呢？科学家对植物的这种“返老还童”现象作了长期艰苦的研究，发现它同植物激素关系很大，是植物激素中的生长素、细胞分裂素在发挥威力。一般认
At the beginning of this century, German botanists successfully cultivated plant cells and found that young plants can be cultivated from plant cells. How can a mature plant grow a small plant? Scientists have made long-term and arduous studies on the “rejuvenation” phenomenon of plants and found that it has a great relationship with phytohormones. It is the auxin and cytokinin in plant hormones that exert their power. General recognition