Seaweed Allelopathy Against Coral: Surface Distribution of a Seaweed Secondary Metabolite by Imaging Mass Spectrometry
| Autor: | May D. Wang, Tiffany D. Andras, Mark E. Hay, Facundo M. Fernández, Troy S. Alexander, Asiri Gahlena, R. Mitchell Parry, Julia Kubanek |
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| Rok vydání: | 2012 |
| Předmět: |
Spectrometry
Mass Electrospray Ionization Metabolite Coral Population Dynamics Porites Secondary metabolite Biochemistry Article Mass Spectrometry Pheromones Mass spectrometry imaging chemistry.chemical_compound Species Specificity Algae Chlorophyta Anthozoa Botany medicine Animals Fiji Chromatography High Pressure Liquid Ecology Evolution Behavior and Systematics Allelopathy Analysis of Variance biology fungi General Medicine Seaweed biology.organism_classification chemistry Pyrones Rhodophyta Macrolides Hydrophobic and Hydrophilic Interactions medicine.drug |
| Zdroj: | Journal of Chemical Ecology. 38:1203-1214 |
| ISSN: | 1573-1561 0098-0331 |
| DOI: | 10.1007/s10886-012-0204-9 |
| Popis: | Coral reefs are in global decline, with seaweeds increasing as corals decrease. Although seaweeds inhibit coral growth, recruitment, and survivorship, the mechanism of these interactions is poorly understood. Here, we used field experiments to show that contact with four common seaweeds induces bleaching on natural colonies of Porites rus. Controls in contact with inert, plastic mimics of seaweeds did not bleach, suggesting seaweed effects resulted from allelopathy rather than shading, abrasion, or physical contact. Bioassay-guided fractionation of the hydrophobic extract from the red alga Phacelocarpus neurymenioides revealed a previously characterized antibacterial metabolite, neurymenolide A, as the main allelopathic agent. For allelopathy of lipid-soluble metabolites to be effective, the compounds would need to be deployed on algal surfaces where they could transfer to corals on contact. We used desorption electrospray ionization mass spectrometry (DESI-MS) to visualize and quantify neurymenolide A on the surface of P. neurymenioides, and we found the molecule on all surfaces analyzed, with highest concentrations on basal portions of blades. |
| Databáze: | OpenAIRE |
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