cytokinin

cytokinin

[sahy-tuh-kahy-nin]
noun Biochemistry.
any of a class of plant hormones, produced by the roots and traveling upward through the xylem, that promote tissue growth and budding and, on application, retard plant senescence.
Compare kinetin, zeatin.


Origin:
1960–65; cyto- + -kinin

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Collins
World English Dictionary
cytokinin (ˌsaɪtəʊˈkaɪnɪn)
 
n
Also called: kinin any of a group of plant hormones that promote cell division and retard ageing in plants

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
cytokinin   (sī'tə-kī'nĭn)  Pronunciation Key 
Any of a class of plant hormones that promote cell division and growth and delay the senescence of leaves. Cytokinins are synthesized mainly in root tips.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

cytokinin

any of a number of plant growth substances that are usually derived from adenine. Synthesized in roots, cytokinins move upward in the xylem (woody tissue) and pass into the leaves and fruits, where they are required for normal growth, for cell differentiation, and, in conjunction with auxin (another plant hormone), to promote cell division.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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