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Endogenous cytokinins, auxins and abscisic acid in Ulva fasciata (Chlorophyta) and Dictyota humifusa (Phaeophyta): towards understanding their biosynthesis and homoeostasis
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SYSNO ASEP 0328734 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Endogenous cytokinins, auxins and abscisic acid in Ulva fasciata (Chlorophyta) and Dictyota humifusa (Phaeophyta): towards understanding their biosynthesis and homoeostasis Title Endogenní hladiny cytokininů, auxinů a kyseliny abscisové v Ulva fasciata (Chlorophyta) a Dictyota humifusa (Phaeophyta): za účelem porozumění jejich biosyntéze a homeostazi Author(s) Stirk, W.A. (ZA)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Hradecká, Veronika (UEB-Q)
Pěnčík, Aleš (UEB-Q) ORCID, RID, SAI
Rolčík, Jakub (UEB-Q)
Strnad, Miroslav (UEB-Q) RID, ORCID
van Staden, J. (ZA)Source Title European Journal of Phycology. - : Taylor & Francis - ISSN 0967-0262
Roč. 44, č. 2 (2009), s. 231-240Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords abscisic acid ; auxins ; cytokinins Subject RIV BO - Biophysics R&D Projects GA206/05/0894 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000265976200010 DOI 10.1080/09670260802573717 Annotation The aim of this study was to investigate variation in concentration of endogenous cytokinins, auxins and abscisic acid in two seaweeds collected over a 1 year period. Ulva fasciata (Ulvales, Chlorophyta) and Dictyota humifusa (Dictyotales, Phaeophyta) were collected bimonthly from the inter-tidal zone at Rocky Bay, South Africa. cis-Zeatin, isopentenyladenine and their ribotide and riboside conjugates were the main cytokinins present in both seaweeds with low concentrations of trans-zeatin, dihydrozeatin and aromatic cytokinins. Based on the cytokinins detected, we propose that the ribotides are also the first intermediates formed during de novo biosynthesis in seaweeds and are subsequently converted to free-bases and ribosides. The only indole compounds detected in both species were free indole-3-acetic acid and indole-3-acetamide (IAM). Endogenous abscisic acid was detected in most samples with levels in U. fasciata generally being higher than those measured in D. humifusa. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2010
Number of the records: 1