Biochemical carbon dioxide concentrating mechanisms

Gontero, Brigitte; Maberly, Stephen Christopher ORCID: https://orcid.org/0000-0003-3541-5903. 2022 Biochemical carbon dioxide concentrating mechanisms. In: Maberly, Stephen Christopher ORCID: https://orcid.org/0000-0003-3541-5903; Gontero, Brigitte, (eds.) Blue planet, red and green photosynthesis: productivity and carbon cycling in aquatic ecosystems. London, ISTE, 133-166.

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Abstract/Summary

Chapter 5. The productivity of terrestrial plants can be limited by water supply and high temperature, but these factors are often replaced in aquatic plants by low light and restricted inorganic carbon supply. Furthermore, oxygen concentrations in water can be over two times greater than air-equilibrium and low diffusion will restrict losses from the chloroplast to the environment. These conditions can cause underwater photosynthesis to be carbon-limited, promoting photorespiration and favoring the possession of a CO2 concentrating mechanism (CCM). Crassulacean acid metabolism (CAM) is similar to C4 metabolism since the first product of carbon fixation in both pathways leads to the formation of C4 organic acids. Future research could increase the number of aquatic species studied since only a fraction has been investigated for possessing a biochemical CCM. Detailed mechanistic studies, which are beginning to be carried out on marine diatoms, should be applied to a wider range of aquatic photoautotrophs.

Item Type:	Publication - Book Section
Digital Object Identifier (DOI):	https://doi.org/10.1002/9781119986782.ch5
UKCEH and CEH Sections/Science Areas:	UKCEH Fellows
ISBN:	9781789450828
NORA Subject Terms:	Ecology and Environment
Date made live:	16 Nov 2022 17:52 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/533570

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