Gibberellin and retardants influence on some ornamental plants and a level of their native growth substances. [Conference paper].
1979
Rounkova L.V.
Grown in the field condition pink, phlox, sneezeweed /Helenium sp./plants were treated on the 1-2 of June with gibberellin /GA(,3), 125 ppm/, kamposan /KM, 5000, 1000, 500, 250 ppm/, chlorcholinchlorid /CCC, 10000 ppm/ alone and together. GA(,3) induced stem elongation and the beginning of plant flowering. In contrast to GA(,3), 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. GA(,3) completely overcame 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 per cent methanol or ethanol and separating it on the paper chromatograms. The elevated activity of auxin - like compounds in leaved as determined by bioassay of wheat coleoptile sections was observed after GA(,3) - 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 GA(,3) treatment and then lowered rapidly. CCC significantly increased the level of chlorogenic acid in stems but decreased it in leaves.
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