ISHS Acta Horticulturae 91: Symposium on Growth Regulators in Floriculture
GIBBERELLIN AND RETARDANTS INFLUENCE ON SOME ORNAMENTAL PLANTS AND A LEVEL OF THEIR NATIVE GROWTH SUBSTANCES |
| Author: | L.V. Rounkova |
| Abstract:
Grown in the field condition pink, phlox, sneezeweed /Helenium sp./ plants were treated on the 1–2 of June with gibberellin /GA3, 125 ppm/, kamposan /KM, 5000, 1000, 500, 250 ppm/, chlorcholinchlorid /CCC, 10000 ppm/ alone and together. GA3 induced stem elongation and the beginning of plant flowering. In contrast to GA3, CCC and KM decreased stem length and retarded the development of inflorescences especially markedly at high concentrations of KM: by the end of the season the flower number was equal to or more than that in untreated plants in the CCC-case, but less in KM variant. GA3 completely overcome CCC-induced effects, but failed to do it in the KM-case. The native growth substances were studied in liophylized material after extracting it with 70% methanol or ethanol and separating it on the paper chromatograms. The elevated activity of auxin - like compounds in leaves as determined by bioassay of wheat coleoptile sections was observed after GA3 - treatment and to much greater extent after KM treatment. CCC decreased the auxin level in apices, but not in the leaves. The content of chlorogenic acid was increasing during 2 days after GA3 treatment and then lowered rapidly. CCC significantly increased the level of chlorogenic acid in stems but decreased it in leaves. | |
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