Metabolomics and proteomics reveal impacts of chemically mediated competition on marine plankton

Kelsey L. Poulson-Ellestad; Christina M. Jones; Jessie RoyMark R. ViantFacundo M. FernándezJulia KubanekBrook L. Nunn

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Metabolomics and proteomics reveal impacts of chemically mediated competition on marine plankton

机译：Metabolomics and proteomics reveal impacts of chemically mediated competition on marine plankton

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Competition is a major force structuring marine planktonic communities. The release of compounds that inhibit competitors, a process known as allelopathy, may play a role in the maintenance of large blooms of the red-tide dinoflagellate Karenia brevis, which produces potent neurotoxins that negatively impact coastal marine ecosystems. K. brevis is variably allelopathic to multiple competitors, typically causing sublethal suppression of growth. We used metabolomic and proteomic analyses to investigate the role of chemically mediated ecological interactions between K. brevis and two diatom competitors, Asterionellopsis glacialis and Thalassiosira pseudonana. The impact of K. brevis allelopathy on competitor physiology was reflected in the metabolomes and expressed proteomes of both diatoms, although the diatom that co-occurs with K. brevis blooms (A. glacialis) exhibited more robust metabolism in response to K. brevis. The observed partial resistance of A. glacialis to allelopathy may be a result of its frequent exposure to K. brevis blooms in the Gulf of Mexico. For the more sensitive diatom, T. pseudonana, which may not have had opportunity to evolve resistance to K. brevis, allelopathy disrupted energy metabolism and impeded cellular protection mechanisms including altered cell membrane components, inhibited osmoregulation, and increased oxidative stress. Allelopathic compounds appear to target multiple physiological pathways in sensitive competitors, demonstrating that chemical cues in the plankton have the potential to alter large-scale ecosystem processes including primary production and nutrient cycling.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2014年第24期|9009-9014|共6页
作者
Kelsey L. Poulson-Ellestad; Christina M. Jones; Jessie RoyMark R. ViantFacundo M. FernándezJulia KubanekBrook L. Nunn;
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作者单位

School of Biology, Aquatic Chemical Ecology Center, Georgia Institute of Technology, Atlanta, GA 30332;

School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332;

School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United KingdomInstitute of Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332Department of Genome Sciences, University of Washington, Seattle, WA 98195;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
chemical ecology; systems biology; mass spectrometry;

Metabolomics and proteomics reveal impacts of chemically mediated competition on marine plankton

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