PHOTOSYNTHESIS AND CALCIFICATION BY EMILIANIA HUXLEYI (PRYMNESIOPHYCEAE) AS A FUNCTION OF INORGANIC CARBON SPECIES

@article{Buitenhuis1999PHOTOSYNTHESISAC,
  title={PHOTOSYNTHESIS AND CALCIFICATION BY EMILIANIA HUXLEYI (PRYMNESIOPHYCEAE) AS A FUNCTION OF INORGANIC CARBON SPECIES},
  author={E. Buitenhuis and H. D. de Baar and M. Veldhuis},
  journal={Journal of Phycology},
  year={1999},
  volume={35}
}
To test the possibility of inorganic carbon limitation of the marine unicellular alga Emiliania huxleyi (Lohmann) Hay and Mohler, its carbon acquisition was measured as a function of the different chemical species of inorganic carbon present in the medium. Because these different species are interdependent and covary in any experiment in which the speciation is changed, a set of experiments was performed to produce a multidimensional carbon uptake scheme for photosynthesis and calcification… Expand
Calcification and inorganic carbon acquisition in coccolithophores.
TLDR
Considerable evidence exists for HCO3- as the substrate for calcification in coccolithophores, however, evidence for a direct role for calcifying in supply of Ci for photosynthesis is less clear. Expand
Acquisition and use of bicarbonate by Emiliania huxleyi.
TLDR
The biphasic kinetics of photosynthesis and calcification are caused by the presence of two bicarbonate acquisition mechanisms and also, since calcification does not enhance photosynthesis in this coccolithophore, the current view that the two processes are tightly coupled is questioned. Expand
CO2‐concentrating mechanisms in three southern hemisphere strains of Emiliania huxleyi
TLDR
It is postulate that under higher CO2 levels cocco‐lithophorids will be able to down‐regulate their CCMs, and re‐direct some of the metabolic energy to processes such as calcification, due to the expected rise inCO2 levels. Expand
Physiological regulation of carbon fixation in the photosynthesis and calcification of coccolithophorids.
  • Y. Shiraiwa
  • Biology, Medicine
  • Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology
  • 2003
TLDR
It is assumed that the coccolithophorid blooms in the ocean might be separated into two phases; firstly, the increase in cell population might be triggered by an adequate supply of nutrients to enhance algal growth and then the calcification might subsequently be stimulated when the nutrients become depleted by substantialAlgal growth. Expand
NO MECHANISTIC DEPENDENCE OF PHOTOSYNTHESIS ON CALCIFICATION IN THE COCCOLITHOPHORID EMILIANIA HUXLEYI (HAPTOPHYTA) 1
TLDR
The results show unequivocally that as a process, photosynthesis in E. huxleyi is mechanistically independent from calcification. Expand
A review of the coccolithophorid Emiliania huxleyi (Prymnesiophyceae), with particular reference to growth, coccolith formation, and calcification-photosynthesis interactions
TLDR
Older as well as more recently acquired information on reproduction, morphology, ecophysiology, and cell physiology of E. huxleyi is reviewed, emphasizing aspects that are relevant to coccolith formation and calcification–photosynthesis interactions. Expand
Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO2: from physiology to molecular level
TLDR
The observation that elevated pCO2 induces only limited changes in the transcription of several transporters of calcium and bicarbonate gives new significant elements to understand cellular mechanisms underlying the early response of E. huxleyi to CO2-driven ocean acidification. Expand
Interaction of the coccolithophore Gephyrocapsa oceanica with its carbon environment: response to a recreated high-CO2 geological past.
TLDR
These findings demonstrate that G. oceanica changes its carbon-use physiology to maintain consistent photosynthetic carbon fixation in concert with different levels of ambient DIC without changing its morphology or calcification. Expand
Dissecting the impact of CO2 and pH on the mechanisms of photosynthesis and calcification in the coccolithophore Emiliania huxleyi.
TLDR
E. huxleyi appears to have evolved mechanisms to respond to limiting rather than elevated CO2, and calcification does not function as a CCM, but is inhibited at low DIC to allow the redistribution of DIC from calcification to photosynthesis. Expand
Response of coccolithophorid Emiliania huxleyi to elevated partial pressure of CO2 under nitrogen limitation
TLDR
Results suggest that increasing pCO2 has no noticeable effect on the calcifica- tion/photosynthesis ratio (C /P) when cells of E. huxleyi are NO3-limited, and, in contrast to previous studies with N-replete cultures, gross community production (GCP) and dark community respiration (DCR) also decreased. Expand
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In the short-term incubations, cells from P-limited chemostats showed a relative increase in the capacity for calcification under reduced irradiance and in the dark, and Nutrient effects on calcification are of potential interest in considerations of the impact of E. huxleyi blooms on the sea-air CO2 interchange. Expand
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PROCESSES that control carbon uptake by marine phytoplankton are important in the global carbon cycle11–3. Uptake of CO2 itself may be limited by diffusion4. Bicarbonate uptake may be limited by zincExpand
Blooms of phytoplankton including Emiliania huxleyi (Haptophyta). Effects of nutrient supply in different N : P ratios
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