Endogenous cytokinins, auxins, and abscisic acid in red algae from Brazil

0359279 - ÚEB 2011 RIV US eng J - Journal Article
Yokoya, N. S. - Stirk, W. A. - van Staden, J. - Novák, Ondřej - Turečková, Veronika - Pěnčík, Aleš - Strnad, Miroslav
Endogenous cytokinins, auxins, and abscisic acid in red algae from Brazil.
Journal of Phycology. Roč. 46, č. 6 (2010), s. 1198-1205. ISSN 0022-3646. E-ISSN 1529-8817
R&D Projects: GA ČR GA301/08/1649
Institutional research plan: CEZ:AV0Z50380511
Keywords : ENDOGENOUS * CYTOKININS * AUXINS * ABSCISIC ACID * RED * ALGAE * BRAZIL
Subject RIV: EF - Botanics
Impact factor: 2.239, year: 2010

Endogenous cytokinins (CKs), auxins, and abscisic acid (ABA) were identified and quantified in 11 red algae collected from the Brazilian coast. Seaweed materials were extracted, purified by solid-phase extraction followed by immunoaffinity chromatography, and analyzed by liquid chromatography-tandem mass spectrometry. Isoprenoid CKs were detected in all species, aromatic CKs were not detected in any of the samples. The CK profile of Chondracanthus teedei (Mert. ex Roth) Kütz. was distinct in comparison to other species with para-topolin derivatives detected in low concentrations. The main auxins present in all species were free indole-3-acetic acid and indole-3-acetamide. ABA was present in all species analyzed except for Hypnea nigrescens Grev. ex J. Agardh. No ABA conjugates were detected in any species. These results confirm that plant hormones were common constituents in red seaweeds, with this being the first report of the occurrence of ABA in Rhodophyta.
Permanent Link: http://hdl.handle.net/11104/0197090