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Response of cytokinin pool and cytokinin oxidase/dehydrogenase activity to abscisic acid exhibits organ specificity in peas
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SYSNO ASEP 0320003 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Response of cytokinin pool and cytokinin oxidase/dehydrogenase activity to abscisic acid exhibits organ specificity in peas Title Vliv kyseliny abscisové na hladiny cytokininů a aktivitu cytokinin oxidázy/dehydrogenázy vykazuje v rostlinách hrachu orgánovou specifitu Author(s) Vaseva, I. (BG)
Todorova, D. (BG)
Malbeck, Jiří (UEB-Q) RID, ORCID
Trávníčková, Alena (UEB-Q) ORCID
Macháčková, Ivana (UEB-Q)Source Title Acta Physiologiae Plantarum. - : Springer - ISSN 0137-5881
Roč. 30, č. 2 (2008), s. 151-155Number of pages 5 s. Language eng - English Country PL - Poland Keywords Abscisic acid ; Cytokinins ; Cytokinin Subject RIV EF - Botanics CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000252887800004 DOI 10.1007/s11738-007-0103-9 Annotation Changes in cytokinin pool and cytokinin oxidase/dehydrogenase activity (CKX EC: 1.5.99.12) in response to increasing abscisic acid (ABA) concentrations (0.5-10 mu M) were assessed in the last fully expanded leaves and secondary roots of two pea (Pisum sativum) varieties with different vegetation periods. Certain organ diversity in CKX response to exogenous ABA was observed. Treatment provoked altered cytokinin pool in the aboveground parts of both studied cultivars. Specific CKX activity was influenced significantly basically in roots of the treated plants. Results suggest that ABA-mediated cytokinin pool changes are leaf-specific and involve certain root signals in which CKX activity presents an important link. This enzymatic activity most probably regulates vascular transport of active cytokinins from roots to shoots. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2009
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