ISHS Acta Horticulturae 167: II Symposium on Growth Regulators in Floriculture
CYTOKININS' EFFECT ON SOME ORNAMENTAL PLANTS |
| Author: | L.V. Rounkova |
| Abstract:
The influence of cytokinins on growth and flowering of plants grown in the field has been studied very rarely. Sneezeweed /Helenium sp./, phloxes, dahlia and pot-marigold /Calendula sp./ were sprayed with kinetin /KIN/, benzyloaminopurine /BAP/, kartolin /KT/ /20–40 ppm/ in the very beginning of vegetation, the spraying was performed three times with a week interval, tween 65 /0.01 %/ added. The stimulation of growth with KIN was insignificant while BAP and KT didn't practically influence the height and even prevented the growth in some cases. BAP and KIN increased the number of lateral branches on the main stem considerably. As a result of combined treatment /GA added/ the plant resembled GA variant by the height but they had many more branches. The using of cytokinins resulted in increase of weight of the plants, especially of roots and leaves. The surface of the leaves was increased. The inhibition of the beginning of flowering was noticed as well but the general quantity of buttons and inflorescences of sneezeweed in KIN and KT variants was more than that of the untreated plants. Curiously enough, cytokinins didn't effect the flowering of phloxes. The application of cytokinins resulted in increase of chlorogenic acid in the leaves of sneezeweed and dahlia as well as in changing of the level of this substance in the stems and tops. The role of cytokinin and polyphenols in growth processes of plants is considered. | |
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