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Plant Physiology 65:437-441 (1980) © 1980 American Society of Plant Biologists Changes in Endogenous Cytokinin Levels in Partially Synchronized Cultured Tobacco Cells 1 noDepartment of Pure and Applied Sciences, College of General Education, University of Tokyo, Meguro-ku, Tokyo 153 Japan
During the course of partially synchronized cell divisions in cultured tobacco (Xanthi) cells the amount of endogenous cytokinins in the butanol-soluble fraction increased 5 to 10 times in 3 hours and paralleled the increase in frequency of mitosis. Among three cytokinins detected in tobacco cells, the activity corresponding to the RF of authentic zeatin in thin layer chromatography changed in parallel with the mitotic index.
1 This work was supported by Grant 348010 from the Ministry of Education, Japan.
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