Apical dominance in Pssu-ipt-transformed tobacco
| Autor: | Rafaël Smets, Els Prinsen, Tom Struyf, Jan M.C. Geuns, Roland Valcke, Harry Van Onckelen |
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| Rok vydání: | 2001 |
| Předmět: |
Apical dominance
food and beverages Spermine Plant Science General Medicine Horticulture Biology Biochemistry Apex (geometry) Spermidine chemistry.chemical_compound Transformation Genetic chemistry Axillary bud Tobacco Cytokinin Botany Putrescine Polyamine Molecular Biology Chromatography High Pressure Liquid |
| Zdroj: | Phytochemistry: an international journal of plant biochemistry |
| ISSN: | 0031-9422 |
| DOI: | 10.1016/s0031-9422(01)00338-7 |
| Popis: | In Pssu-ipt-transformed tobacco, apical dominance was released by defoliation of the upper nodes, while the apex remained intact. After defoliation, the concentration of cytokinins (CKs) increased whereas IAA remained constant, evoking an increase in the CK/IAA ratio in the buds. Moreover, defoliation resulted in a tremendous increase in the concentrations of aromatic amines (AAs): tyramine (TYR), phenethylamine (PEA) and an as yet unidentified compound. Although the total aliphatic monoamine and polyamine (PA) concentration remained constant, putrescine (PUT) and spermidine (SPD) concentrations in the axillary buds decreased, whereas the concentration of spermine (SPM) increased. Similar changes in PAs and AAs could be observed in the buds of untransformed SR1 plants after decapitation, whereas defoliation without removal of the apex had no effect. This is the first report on the possible involvement of PAs and AAs in apical dominance. |
| Databáze: | OpenAIRE |
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