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The chemical defense ecology of marine unicellular plankton: constraints, mechanisms, and impacts.
- G. Wolfe
- Environmental ScienceThe Biological bulletin
- 1 April 2000
An algal dimethylsulfoniopropionate cleavage reaction that appears to deter protozoan feeding is detail and explored as a possible model for a rapidly activated, short-range chemical defense system.
Activated defense systems in marine macroalgae: evidence for an ecological role for DMSP cleavage
- K. L. Alstyne, G. Wolfe, T. L. Freidenburg, Anna T. Neill, Corrine Hicken
- Environmental Science
- 4 April 2001
The data suggest that DMSP may function as a precursor in an activated defense system in diverse species of temperate macroalgae and may possibly contribute to the widespread success of the Ulvophyceae.
Grazing-activated chemical defence in a unicellular marine alga
It is shown that this reaction deters protozoan herbivores, presumably through the production of highly concentrated acrylate, which has antimicrobial activity, which is believed to be the first report of grazing-activated chemical defence in unicellular microorganisms.
PRODUCTION AND CELLULAR LOCALIZATION OF NEUTRAL LONG‐CHAIN LIPIDS IN THE HAPTOPHYTE ALGAE ISOCHRYSIS GALBANA AND EMILIANIA HUXLEYI 1
Examination of cell ultrastructure shows conspicuous cytoplasmic and chloroplast lipid bodies, and it is suggested that PULCA may be synthesized in chloroplasts and then exported to cytopLasmic lipid bodies for storage and eventual metabolism.
Partial characterisation of dimethylsulfoniopropionate (DMSP) lyase isozymes in 6 strains of Emiliania huxleyi
There are several structurally different DMSP lyase isozymes within E. huxleyi, hinting at possibly different cellular locations and functions, and varying DMS production under natural conditions.
Grazing‐activated production of dimethyl sulfide (DMS) by two clones of Emiliania huxleyi
It is suggested that even low levels of grazing can greatly accelerate DMS production, suggesting that DMSP lyase and DMSP are segregated within these cells and reaction only under conditions that result in cell stress or damage.
Physiological impacts on alkenone paleothermometry
We conducted isothermal (15°C) batch culture experiments with the coccolithophorid Emiliania huxleyi (strain NEPCC 55a) to evaluate the extent to which nutrient and light stress contribute to…
Protist Genetic Diversity in the Acidic Hydrothermal Environments of Lassen Volcanic National Park, USA
It is suggested that Lassen's acidic hydrothermal features may harbor novel protists, and sequence diversity generally declined both with decreasing pH and increasing temperature, and both were controlling physical variables on the abundance and distribution of organisms at the authors' sites.
The cycling of sulfur in surface seawater of the northeast Pacific
Oceanic dimethylsulfide (DMS) emissions to the atmosphere are potentially important to the Earth's radiative balance. Since these emissions are driven by the surface seawater concentration of DMS, it…
Microbial consumption and production of dimethyl sulfide (DMS) in the Labrador Sea
It is suggested that DMS consumption likely saturates more easily than microbial DMS production from DMSP, and this, combined with temperature limitation on the growth of prokaryotic DMS consumers, may lead to the periodic buildup of high DMS concentrations previously observed in polar and subpolar waters.