Radioactive Gibberellin A5 and Its Metabolism in Dwarf Peas
- 1 January 1970
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 45 (1) , 56-61
- https://doi.org/10.1104/pp.45.1.56
Abstract
Radioactive gibberellin A(5) ((3)H-GA(5)) was synthesized from gibberellic acid. When it was applied to dwarf peas grown in the dark, an average of 3% was converted to another acid gibberellin within 48 hours. The biological activity of the metabolite did not account for the response to applied GA(5). GA(5) is therefore assumed to be biologically active per se.(3)H-GA(5) did not appear to form a stable complex with a macromolecule in pea shoots. When injected into dwarf pea pods, (3)H-GA(5) was readily metabolized by maturing seed to more water-soluble substances and to two other acidic compounds. This metabolism continued even throughout germination of the seed without reconversion of the metabolites to GA(5). It is concluded that "bound" GA(5) plays no part in the germination of dwarf pea seeds.Keywords
This publication has 7 references indexed in Scilit:
- Fate of Radioactive Gibberellin A1 in Maturing and Germinating Seeds of Peas and Japanese Morning GloryPlant Physiology, 1968
- Extractable and Diffusible Gibberellins From Light- and Dark-grown Pea SeedlingsPlant Physiology, 1968
- Preparation of Radioactive Gibberellin A1 and its Metabolism in Dwarf PeasPlant Physiology, 1967
- An enzymic site of inhibition of gibberellin biosynthesis by Amo 1618 and other plant growth retardants.Plant Physiology, 1965
- Gibberellin Production in Pea Seeds Developing in Excised Pods: Effect of Growth Retardant AMO-1618Science, 1965
- Gibberellins and Light Inhibition of Stem Growth in PeasPlant Physiology, 1964
- Die Dünnschichtchromatographie von GibberellinenCellular and Molecular Life Sciences, 1962