Cytokinin activity of disubstituted aminopurines in Amaranthus

0337490 - ÚEB 2010 RIV PT eng J - Journal Article
Garcia-Raso, A. - Cabot, C. - Fiol, J. J. - Spíchal, Lukáš - Nisler, Jaroslav - Tasada, A. - Luna, J. M. - Alberti, F. M. - Sibole, J. V.
Cytokinin activity of disubstituted aminopurines in Amaranthus.
Journal of Plant Physiology. Roč. 166, č. 14 (2009), s. 1529-1536. ISSN 0176-1617. E-ISSN 1618-1328
R&D Projects: GA ČR GD522/08/H003
Institutional research plan: CEZ:AV0Z50380511
Keywords : Benzylaminopurine * Betacyanin * CO2 assimilation
Subject RIV: CE - Biochemistry
Impact factor: 2.500, year: 2009

Cytokinin (CK) receptors have different affinities for certain Ligands, and consequently, studies of the plant's response to CK analogues constitute a good approach to identify active compounds that trigger specific plant responses. In this study, N-6 and N-6 N-6-substituted CK analogues were synthesized and their CK-like activity was examined in the Amaranthus betacyanin and the bacterial. receptor assay. The compounds showed CK-like activities that were not always associated with their binding affinity to the Arabidopsis receptors AHK3 and CRE1/AHK4. The highest level of activity in both bioassays was obtained for the N-6-alkylaminopurines, which showed an especially high binding affinity to AHK3. In contrast to previously published data, we found remarkable activity of N-6,N-6-alkylbenzylaminopurines in the Amaranthus betacyanin bioassay, which was not associated with their binding affinity to the tested receptors.
Permanent Link: http://hdl.handle.net/11104/0181470