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Influence of cytokinins and novel cytokinin antagonists on the senescence of detached leaves of <Emphasis Type="Italic">Arabidopsis thaliana</Emphasis> |
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| Authors: | I Sergiev D Todorova M Somleva V Alexieva E Karanov E Stanoeva V Lachkova A Smith M Hall |
| Institution: | (1) Institute of Plant Physiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, BG-1113 Sofia, Bulgaria;(2) Faculty of Chemistry, St. Kliment Ochridski University of Sofia, 1 J. Boucher Blvd., BG-1126 Sofia, Bulgaria;(3) Faculty of Ecology, Landscape Architecture and Agronomy, University of Forestry, 10 Kl. Ochridski Blvd., BG-1756 Sofia, Bulgaria;(4) Institute of Biological Sciences, University of Wales, SY233DA Ceredigion, Aberystwyth, UK |
| Abstract: | Cytokinins N6-benzyladenine (BA) and 1-(2-chloropyridin-4-yl)-3-phenylurea (4PU-30) delayed the senescence of detached leaves (3rd to 7th leaf node) of wild and ethylene insensitive eti5 mutant of Arabidopsis thaliana. The novel anticytokinins, structural analogues of purine and phenylurea cytokinins also affected the senescence of detached rosette leaves of A. thaliana. They diminished to a significant extent the cytokinin-induced delay of chlorophyll destruction, but without a considerable difference in their action against both types of cytokinins. These results correlated with changes observed in ribonuclease (RNase) activity. |
| Keywords: | anticytokinins chlorophyll ethylene insensitive mutant leaf node c]RNase |
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