Biologia plantarum 51:377-380, 2007 | DOI: 10.1007/s10535-007-0079-8

Influence of cytokinins and novel cytokinin antagonists on the senescence of detached leaves of Arabidopsis thaliana

I. Sergiev1, D. Todorova1,*, M. Somleva1, V. Alexieva1, E. Karanov1, E. Stanoeva2, V. Lachkova3, A. Smith4, M. Hall4
1 Institute of Plant Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
2 Faculty of Chemistry, St. Kliment Ochridski University of Sofia, Sofia, Bulgaria
3 Faculty of Ecology, Landscape Architecture and Agronomy, University of Forestry, Sofia, Bulgaria
4 Institute of Biological Sciences, University of Wales, Ceredigion, Aberystwyth, UK

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
Subjects: Arabidopsis thaliana; auxins; chlorophyll a,b; cytokinins; mutagenesis, mutants; ribonuclease

Received: August 21, 2005; Accepted: April 17, 2006; Published: June 1, 2007Show citation

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Sergiev, I., Todorova, D., Somleva, M., Alexieva, V., Karanov, E., Stanoeva, E., ... Hall, M. (2007). Influence of cytokinins and novel cytokinin antagonists on the senescence of detached leaves of Arabidopsis thaliana. Biologia plantarum, 51(2), 377-380. doi: 10.1007/s10535-007-0079-8.
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