Fukuda H, Komamine A
Department of Botany, Faculty of Science, University of Tokyo, Tokyo 113, Japan.
Plant Physiol. 1980 Jan;65(1):61-4. doi: 10.1104/pp.65.1.61.
A serial observation of the process of tracheary element differentiation from single cells isolated from the mesophyll of Zinnia elegans L. cv. Canary bird provided the first direct evidence for the cytodifferentiation without intervening mitosis. Percentage of the tracheary elements formed without cell division was about 60% of total tracheary elements formed on the 4th day of culture. The number of tracheary elements formed without intervening mitosis was not reduced in the presence of colchicine at the concentrations blocking cell division. These facts clearly indicate that cell division is not a prerequisite for tracheary element differentiation in this system.
对从百日草属的金鸟草品种的叶肉中分离出的单个细胞进行的一系列观察，为无中间有丝分裂的细胞分化提供了首个直接证据。在培养第4天形成的总管状分子中，无细胞分裂形成的管状分子所占比例约为60%。在阻断细胞分裂的秋水仙碱存在的情况下，无中间有丝分裂形成的管状分子数量并未减少。这些事实清楚地表明，在该系统中，细胞分裂不是管状分子分化的先决条件。
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