Characterization of allelopathic compounds from the red tide dinoflagellate Karenia brevis

Prince, Emily K.; Poulson, Kelsey L.; Myers, Tracey L.; Sieg, R. Drew; Kubanek, Julia

doi:10.1016/j.hal.2010.06.003

Cited by 65 publications

(40 citation statements)

References 54 publications

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“…Finally, changes in target cell abundances were observed at Alexandrium cell densities as low as 10 5 cells L À1 in culture but as low as 10 4 cells L À1 during blooms indicating the existence of clonal variability in allelopotency or a loss of allelo-potency over time in culture (Martins et al, 2004). Collectively, all of these findings suggest that different Alexandrium strains produce multiple allelochemicals that target and differentially impact different phytoplankton (Ma et al, 2009;Poulson et al, 2010;Prince et al, 2010).…”

Section: Discussionmentioning

confidence: 83%

Allelopathic inhibition of competing phytoplankton by North American strains of the toxic dinoflagellate, Alexandrium fundyense: Evidence from field experiments, laboratory experiments, and bloom events

Hattenrath-Lehmann

Gobler

2011

Harmful Algae

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Section: Discussionmentioning

confidence: 83%

Allelopathic inhibition of competing phytoplankton by North American strains of the toxic dinoflagellate, Alexandrium fundyense: Evidence from field experiments, laboratory experiments, and bloom events

Hattenrath-Lehmann

Gobler

2011

Harmful Algae

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“…Although brevetoxins have been found to lack allelopathic potency in most studies thus far (4,(23)(24)(25), K. brevis produces an additional group of unstable, polar compounds (24) that negatively influence several competing phytoplankton species (4,25). As a relatively weak exploitation competitor (26), K. brevis may use allelopathy to maintain monospecific blooms in near-shore waters (4).…”

mentioning

confidence: 99%

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

Poulson‐Ellestad

Jones

Roy

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

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120

106

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Significance Microscopic marine algae (phytoplankton) are responsible for much of Earth's photosynthesis, serving as the base of a massive food web supporting fisheries. Phytoplankton compete for limiting resources, with some species producing noxious compounds that kill competitors or inhibit their growth. The red-tide dinoflagellate Karenia brevis is one such allelopathic species, causing growth suppression of other phytoplankton and negatively impacting coastal ecosystems. Metabolomic and proteomic approaches were used to characterize the sublethal physiological impacts of K. brevis allelopathy on two competing phytoplankton, providing insights into the physiological mechanisms by which allelopathy occurs and the metabolic pathways that enable resistance in co-occurring competitors.

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“…Being defined by function, allelochemicals have diverse chemical structures and molecular weights (Leão et al, 2009). Karenia brevis produces multiple small (500 to 1000 Da) allelochemicals containing aromatic groups that inhibit the growth of the diatom Asterionellopsis glacialis (Prince et al, 2010). In contrast, the raphidophyte Heterosigma akashiwo releases a high molecular weight polysaccharide-protein complex (> 1 000 000 Da) that inhibits the growth of the diatom Skeletonema costatum by binding to the surface of the cells (Yamasaki et al, 2009).…”

Section: Allelochemicalsmentioning

confidence: 99%

Dissolved organic matter (DOM) release by phytoplankton in the contemporary and future ocean

Thornton

2014

European Journal of Phycology

356

311

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The partitioning of organic matter (OM) between dissolved and particulate phases is an important factor in determining the fate of organic carbon in the ocean. Dissolved organic matter (DOM) release by phytoplankton is a ubiquitous process, resulting in 2-50% of the carbon fixed by photosynthesis leaving the cell. This loss can be divided into two components: passive leakage by diffusion across the cell membrane and the active exudation of DOM into the surrounding environment. At present there is no method to distinguish whether DOM is released via leakage or exudation. Most explanations for exudation remain hypothetical; as while DOM release has been measured extensively, there has been relatively little work to determine why DOM is released. Further research is needed to determine the composition of the DOM released by phytoplankton and to link composition to phytoplankton physiological status and environmental conditions. For example, the causes and physiology of phytoplankton cell death are poorly understood, though cell death increases membrane permeability and presumably DOM release. Recent work has shown that phytoplankton interactions with bacteria are important in determining both the amount and composition of the DOM released. In response to increasing CO 2 in the atmosphere, climate change is creating increasingly stressful conditions for phytoplankton in the surface ocean, including relatively warm water, low pH, low nutrient supply and high light. As ocean physics and chemistry change, it is hypothesized that a greater proportion of primary production will be released directly by phytoplankton into the water as DOM. Changes in the partitioning of primary production between the dissolved and particulate phases will have bottom-up effects on ecosystem structure and function. There is a need for research to determine how these changes affect the fate of organic matter in the ocean, particularly the efficiency of the biological carbon pump.

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Characterization of allelopathic compounds from the red tide dinoflagellate Karenia brevis

Cited by 65 publications

References 54 publications

Allelopathic inhibition of competing phytoplankton by North American strains of the toxic dinoflagellate, Alexandrium fundyense: Evidence from field experiments, laboratory experiments, and bloom events

Allelopathic inhibition of competing phytoplankton by North American strains of the toxic dinoflagellate, Alexandrium fundyense: Evidence from field experiments, laboratory experiments, and bloom events

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

Dissolved organic matter (DOM) release by phytoplankton in the contemporary and future ocean

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