
1) Growth regulator 2) Kinin 3) Phytohormone 4) Plant hormone
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https://www.crosswordclues.com/clue/cytokinin

1) Kinin
Found on
https://www.crosswordclues.com/clue/cytokinin

Cytokinins (CK) are a class of plant growth substances (phytohormones) that promote cell division, or cytokinesis, in plant roots and shoots. They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth, and leaf senescence. Folke Skoog discovered their effects using coconut milk in the 1940...
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http://en.wikipedia.org/wiki/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 ... [4 related articles]
Found on
http://www.britannica.com/eb/a-z/c/176

<protein> Class of plant growth substances (plant hormones) active in promoting cell division. Also involved in cell growth and differentiation and in other physiological processes. ... Examples: kinetin, zeatin, benzyl adenine. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973

A plant growth regulator that stimulates cell division.
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https://www.encyclo.co.uk/local/22581

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. Cf. kinetin, zeatin.
Found on
https://www.infoplease.com/dictionary/cytokinin
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