Photorespiratory compensation: a driver for biological diversity
- PMID: 23656429
- DOI: 10.1111/plb.12024
Photorespiratory compensation: a driver for biological diversity
Abstract
This paper reviews how terrestrial plants reduce photorespiration and thus compensate for its inhibitory effects. As shown in the equation φ = (1/Sc/o )O/C, where φ is the ratio of oxygenation to carboxylation, Sc/o is the relative specificity of Rubisco, O is stromal O2 level and C is the stromal CO2 concentration, plants can reduce photorespiration by increasing Sc/o or C, or by reducing O. By far the most effective means of reducing φ is by concentrating CO2, as occurs in C4 and CAM plants, and to a lesser extent in plants using a glycine shuttle to concentrate CO2 into the bundle sheath. Trapping and refixation of photorespired CO2 by a sheath of chloroplasts around the mesophyll cell periphery in C3 plants also enhances C, particularly at low atmospheric CO2. O2 removal is not practical because high energy and protein investment is needed to have more than a negligible effect. Sc/o enhancement provides for modest reductions in φ, but at the potential cost of limiting the kcat of Rubisco. An effective means of decreasing φ and enhancing carbon gain is to lower leaf temperature by reducing absorbance of solar radiation, or where water is abundant, opening stomata. By using a combination of mechanisms, C3 plants can achieve substantial (>30%) reductions in φ. This may have allowed many C3 species to withstand severe competition from C4 plants in low CO2 atmospheres of recent geological time, thereby preserving some of the Earth's floristic diversity that accumulated over millions of years.
© 2013 German Botanical Society and The Royal Botanical Society of the Netherlands.
Similar articles
-
Modelling (18)O2 and (16)O2 unidirectional fluxes in plants. III: fitting of experimental data by a simple model.Biosystems. 2013 Aug;113(2):104-14. doi: 10.1016/j.biosystems.2012.10.004. Epub 2012 Nov 13. Biosystems. 2013. PMID: 23153764
-
Modelling (18)O2 and (16)O2 unidirectional fluxes in plants. IV: role of conductance and laws of its regulation in C3 plants.Biosystems. 2013 Aug;113(2):115-26. doi: 10.1016/j.biosystems.2012.11.002. Epub 2013 Jan 11. Biosystems. 2013. PMID: 23318161
-
Current methods for estimating the rate of photorespiration in leaves.Plant Biol (Stuttg). 2013 Jul;15(4):648-55. doi: 10.1111/j.1438-8677.2012.00694.x. Epub 2012 Nov 27. Plant Biol (Stuttg). 2013. PMID: 23186383 Review.
-
Temperature response of carbon isotope discrimination and mesophyll conductance in tobacco.Plant Cell Environ. 2013 Apr;36(4):745-56. doi: 10.1111/j.1365-3040.2012.02591.x. Epub 2012 Sep 3. Plant Cell Environ. 2013. PMID: 22882584
-
The efficiency of C(4) photosynthesis under low light conditions: assumptions and calculations with CO(2) isotope discrimination.J Exp Bot. 2011 May;62(9):3119-34. doi: 10.1093/jxb/err073. Epub 2011 Apr 28. J Exp Bot. 2011. PMID: 21527629 Review.
Cited by
-
Seed size effects on plant establishment under low atmospheric CO2, with implications for seed size evolution.Ann Bot. 2022 Dec 16;130(6):825-834. doi: 10.1093/aob/mcac112. Ann Bot. 2022. PMID: 36094296 Free PMC article.
-
Low assimilation efficiency of photorespiratory ammonia in conifer leaves.J Plant Res. 2018 Sep;131(5):789-802. doi: 10.1007/s10265-018-1049-2. Epub 2018 Jun 9. J Plant Res. 2018. PMID: 29948486
-
C4 grasses employ distinct strategies to acclimate rubisco activase to heat stress.Biosci Rep. 2024 Oct 30;44(10):BSR20240353. doi: 10.1042/BSR20240353. Biosci Rep. 2024. PMID: 39361893 Free PMC article.
-
Atmospheric CO2 decline and the timing of CAM plant evolution.Ann Bot. 2023 Nov 25;132(4):753-770. doi: 10.1093/aob/mcad122. Ann Bot. 2023. PMID: 37642245 Free PMC article.
-
The role of photorespiration during the evolution of C4 photosynthesis in the genus Flaveria.Elife. 2014 Jun 16;3:e02478. doi: 10.7554/eLife.02478. Elife. 2014. PMID: 24935935 Free PMC article.
Publication types
MeSH terms
Substances
LinkOut - more resources
Full Text Sources
Other Literature Sources
Research Materials
Miscellaneous