caa a22 4500 477099971 CHVBK 20180405111538.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00196659 doi (NATIONALLICENCE)springer-10.1007/BF00196659 The vertebrate pineal hormone melatonin is produced by the brown alga Pterygophora californica and mimics dark effects on growth rate in the light [Elektronische Daten] [Birgit Fuhrberg, Ivonne Balzer, Rüdiger Hardeland, Astrid Werner, Klaus Lüning] Melatonin, a methoxylated indoleamine, plays a role as a mediator of darkness in animals as well as in the unicellular alga Gonyaulax polyedra Stein and was recently detected in higher plants. We report on the first finding of melatonin in a multicellular alga, the brown alga Pterygophora californica Rupr. Melatonin was identified in juvenile sporophytes of P. californica by two independent methods, reverse-phase high-performance liquid chromatography (HPLC) with electrochemical detection, and radioimmunoassay. Another indolic metabolite, 5-methoxytryptophol, was also indentified by HPLC. The rapid decline of growth rate upon the onset of darkness in P. californica is mimicked by melatonin in the light, with increasing efficiency from 5 × 10−5M to 5 × 10−4M, while no effect was obtained at 10−5M. Springer-Verlag, 1996 Circadian rhythm (growth rate) nationallicence Dark effect nationallicence Growth rate reduction nationallicence Melatonin nationallicence 5-Methoxytryptophol nationallicence Pterygophora (Phaeophyta) nationallicence ANOVA : analysis of variance nationallicence DMSO : dimethyl sulfoxide nationallicence LD : light-dark cycle nationallicence Fuhrberg Birgit Zoologisches Institut, Universität Göttingen, Berliner Strasse 28, D-37073, Göttingen, Germany aut Balzer Ivonne Zoologisches Institut, Universität Göttingen, Berliner Strasse 28, D-37073, Göttingen, Germany aut Hardeland Rüdiger Zoologisches Institut, Universität Göttingen, Berliner Strasse 28, D-37073, Göttingen, Germany aut Werner Astrid Biologische Anstalt Helgoland, Notkestrasse 31, D-22607, Hamburg, Germany aut Lüning Klaus Biologische Anstalt Helgoland, Notkestrasse 31, D-22607, Hamburg, Germany aut Planta Springer-Verlag 200/1(1996-09-01), 125-131 0032-0935 200:1<125 1996 200 425 https://doi.org/10.1007/BF00196659 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00196659 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fuhrberg Birgit Zoologisches Institut, Universität Göttingen, Berliner Strasse 28, D-37073, Göttingen, Germany aut NATIONALLICENCE 700 1- Balzer Ivonne Zoologisches Institut, Universität Göttingen, Berliner Strasse 28, D-37073, Göttingen, Germany aut NATIONALLICENCE 700 1- Hardeland Rüdiger Zoologisches Institut, Universität Göttingen, Berliner Strasse 28, D-37073, Göttingen, Germany aut NATIONALLICENCE 700 1- Werner Astrid Biologische Anstalt Helgoland, Notkestrasse 31, D-22607, Hamburg, Germany aut NATIONALLICENCE 700 1- Lüning Klaus Biologische Anstalt Helgoland, Notkestrasse 31, D-22607, Hamburg, Germany aut NATIONALLICENCE 773 0- Planta Springer-Verlag 200/1(1996-09-01), 125-131 0032-0935 200:1<125 1996 200 425 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer