The vertebrate pineal hormone melatonin is produced by the brown alga Pterygophora californica and mimics dark effects on growth rate in the light
| Autor: | Ivonne Balzer, Astrid Werner, Klaus Lüning, B. Fuhrberg, Rüdiger Hardeland |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
0303 health sciences
medicine.medical_specialty Metabolite Radioimmunoassay Sporophyte Plant Science Biology biology.organism_classification Melatonin 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Endocrinology Biochemistry Algae chemistry Internal medicine Darkness Genetics medicine Gonyaulax Pterygophora californica 030217 neurology & neurosurgery 030304 developmental biology medicine.drug |
| Zdroj: | Planta. 200 |
| ISSN: | 1432-2048 0032-0935 |
| DOI: | 10.1007/bf00196659 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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