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={Erik T. Buitenhuis and Hein J.W. de Baar and Marcel J. W. 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… 

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.

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.

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.

Physiological regulation of carbon fixation in the photosynthesis and calcification of coccolithophorids.

  • Y. Shiraiwa
  • Environmental Science, Biology
    Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology
  • 2003

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.

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.

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.

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.

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.

The Mechanisms of Calcification in Coccolithophores - The molecular basis of calcium and inorganic carbon transport in Emiliania huxleyi

TLDR
The data confirms previous studies that the substrate for calcification is HCO3- and that growth and organic carbon fixation rates are primarily influenced by CO2, and highlights the importance of developing genetic transformation techniques in coccolithophores to reduce the dependency of using foreign expression systems for the characterization of genes.
...

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TLDR
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TLDR
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