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Raising yield potential of wheat. II. Increasing photosynthetic capacity and efficiency

Author: Parry, M.A.J.
Author: Reynolds, M.P.
Author: Salvucci, M.E.
Author: Raines, C.
Author: Andralojc, P.J.
Author: Xin-Guang Zhu
Author: Price, G.D.
Author: Condon, A.G.
Author: Furbank, R.T.
Year: 2011
ISSN: 0022-0957
Abstract: Past increases in yield potential of wheat have largely resulted from improvements in harvest index rather than increased biomass. Further large increases in harvest index are unlikely, but an opportunity exists for increasing productive biomass and harvestable grain. Photosynthetic capacity and efficiency are bottlenecks to raising productivity and there is strong evidence that increasing photosynthesis will increase crop yields provided that other constraints do not become limiting. Even small increases in the rate of net photosynthesis can translate into large increases in biomass and hence yield, since carbon assimilation is integrated over the entire growing season and crop canopy. This review discusses the strategies to increase photosynthesis that are being proposed by the wheat yield consortium in order to increase wheat yields. These include: selection for photosynthetic capacity and efficiency, increasing ear photosynthesis, optimizing canopy photosynthesis, introducing chloroplast CO2 pumps, increasing RuBP regeneration, improving the thermal stability of Rubisco activase, and replacing wheat Rubisco with that from other species with different kinetic properties
Language: English
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Type: Article
Region: Global
Pages: 453-467
Journal issue: 2
Journal: Journal of Experimental Botany
Journal volume: 62
DOI: 10.1093/jxb/erq304
Keywords: Activase
Keywords: photorespiration
Keywords: Rubisco
Keywords: RuBP
Keywords: CO2

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  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

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