cytokininn.
/ˌsʌɪtə(ʊ)ˈkʌɪnɪn/, U.S. /ˌsaɪdəˈkaɪnᵻn/ Botany.
Any of a large group of natural and synthetic purine derivatives that function as growth regulators in plants, acting to promote cell division, inhibit senescence in leaves and other parts, and assist in the control of a wide variety of other developmental and physiological processes.
ΘΚΠ
the world > life > biology > substance > process stimulators or inhibitors > hormone > [noun] > in plants
hormone1911
wound hormone1921
plant hormone1932
phytohormone1933
auxin1934
heteroauxin1935
florigen1936
traumatic acid1939
abscisin1961
zeatin1963
cytokinin1965
antheridiol1967
abscisic acid1968
oogoniol1975
1965 F. Skoog et al. in Science 23 Apr. 532/3 We now propose cytokinins as a generic term to replace kinins for designating all substances with kinetin-like biological activity.
1968 New Scientist 5 Sept. 503/1 The cytokinins..are necessary for leaves to remain green and healthy.
1990 Org. Gardening Nov. 52/2 Apparently, the phytohormones auxin, cytokinin and gibberellin in kelp products such as SeaMix, Sea Crop and FoliaGro stimulate the increased yields.
2005 C. Tudge Secret Life Trees xi. 272 Horticulturalists may use cytokinins to make side-buds sprout, even when the apical bud is still in place.
This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022).
<
n.1965