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Fraction of global carbon fixation mediated by pyrenoids

Range	~28 - 44 %
Organism	Biosphere
Reference	Mackinder et al., A repeat protein links Rubisco to form the eukaryotic carbon-concentrating organelle. Proc Natl Acad Sci U S A. 2016 May 24 113(21):5958-63. doi: 10.1073/pnas.1522866113 p.5958 left column bottom paragraph and Supporting Information Appendix p.22 Table S1PubMed ID27166422
Primary Source	[3] Field CB, Behrenfeld MJ, Randerson JT, Falkowski P. Primary production of the biosphere: integrating terrestrial and oceanic components. Science. 1998 Jul 10 281(5374):237-40 [13] Behrenfeld MJ et al., Biospheric primary production during an ENSO transition. Science. 2001 Mar 30 291(5513):2594-7 DOI: 10.1126/science.1055071 [14] Rousseaux & Gregg (2013) Interannual variation in phytoplankton primary production at a global scale. Remote Sens 6(1):1–19 [15] Mann GD (1996) Chloroplast morphology, movements and inheritance in diatoms. Cytology, Genetics and Molecular Biology of Algae, eds Chaudhary BR, Agrawal SB (SPB Academic Publishing, Amsterdam), pp 249–274 [16] Thierstein HR, Young JR, eds (2004) Coccolithophores: From Molecular Processes to Global Impact (Springer, Heidelberg, Germany) [17] Meyer M, Griffiths H. Origins and diversity of eukaryotic CO2-concentrating mechanisms: lessons for the future. J Exp Bot. 2013 Jan64(3):769-86. doi: 10.1093/jxb/ers390PubMed ID9657713, 11283369, 23345319
Comments	P.5958 left column bottom paragraph: "At the heart of the CCM [carbon-concentrating mechanism] of eukaryotic algae is an organelle known as the pyrenoid (ref 9). The pyrenoid is a spherical structure in the chloroplast stroma, discovered more than 130 y ago (refs 10–12). Pyrenoids have been found in nearly all of the major oceanic eukaryotic primary producers and mediate ∼28–44% of global carbon fixation (SI Appendix, Table S1) (primary sources)."
Entered by	Uri M
ID	115188