Karenia brevis allelopathy compromises the lipidome, membrane integrity, and photosynthesis of competitors
| Autor: | Remington X. Poulin, Scott R Hogan, Kelsey L. Poulson-Ellestad, Facundo M. Fernández, Emily Brown, Julia Kubanek |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Red tide Thalassiosira pseudonana lcsh:Medicine Thylakoids 01 natural sciences Algal bloom Article 03 medical and health sciences Lipid biosynthesis Botany 14. Life underwater Photosynthesis lcsh:Science Allelopathy Multidisciplinary biology 010604 marine biology & hydrobiology lcsh:R Cell Membrane Dinoflagellate Lipidome Lipid Metabolism biology.organism_classification 030104 developmental biology Biochemistry Phytoplankton Dinoflagellida lcsh:Q Karenia brevis |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-9 (2018) |
| ISSN: | 2045-2322 |
| Popis: | The formation, propagation, and maintenance of harmful algal blooms are of interest due to their negative effects on marine life and human health. Some bloom-forming algae utilize allelopathy, the release of compounds that inhibit competitors, to exclude other species dependent on a common pool of limiting resources. Allelopathy is hypothesized to affect bloom dynamics and is well established in the red tide dinoflagellate Karenia brevis. K. brevis typically suppresses competitor growth rather than being acutely toxic to other algae. When we investigated the effects of allelopathy on two competitors, Asterionellopsis glacialis and Thalassiosira pseudonana, using nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry (MS)-based metabolomics, we found that the lipidomes of both species were significantly altered. However, A. glacialis maintained a more robust metabolism in response to K. brevis allelopathy whereas T. pseudonana exhibited significant alterations in lipid synthesis, cell membrane integrity, and photosynthesis. Membrane-associated lipids were significantly suppressed for T. pseudonana exposed to allelopathy such that membranes of living cells became permeable. K. brevis allelopathy appears to target lipid biosynthesis affecting multiple physiological pathways suggesting that exuded compounds have the ability to significantly alter competitor physiology, giving K. brevis an edge over sensitive species. |
| Databáze: | OpenAIRE |
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