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Algicide Isolated from Marine Bacterium Against Harmful Dinoflagellates

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The isolation and structure elucidation of bacterial secondary metabolites containing an algicide, tryptamine, are described. Their structures were elucidated by extensive 2D NMR techniques including and FAB-MS. Tryptamine showed algicidal activities against C. polykrikoides with LC50 of 12.7 μg/ml. However, the derivatives of tryptamine, such as DL-tryptophan and serotonin, did not show algicidal activities against C. polykrikoides. On the one hand, tryptamine demonstrated significant algicidal activities against a wide range of HAB species. On the other hand, tryptamine showed neither algicidal activities against microalgae of other phyla such as diatom, green algae, nor growth inhibition against yeasts. Therefore, tryptamine seems to be a promising lead compound of algicide that does not show severe influence on the ecosystem.
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Keywords: Algicide; Cochlodinium polykrikoides; Harmful Dinoflagellates; Structure Elucidation

Document Type: Research Article

Affiliations: 1: Department of Biomedical Science, Catholic University of Daegu, Gyeongbuk 38430, Korea 2: Department of Electronic and Electrical Engineering, Catholic University of Daegu, Gyeongbuk 38430, Korea

Publication date: July 1, 2018

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