This is a preview. Log in through your library . Abstract The hypothesis that auxin and gibberellic acid (GA3) control the differentiation of primary phloem fibers is confirmed for the stem of Coleus ...
1. The structure of the seed and the development of the seedling of I pomoea batatas are described. 2. The primary root is tetrarch, and in the growing point three histogens may be observed. The ...
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