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      Exploring high temperature responses of photosynthesis and respiration to improve heat tolerance in wheat

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          Abstract

          The high temperature responses of photosynthesis and respiration in wheat are an underexamined, yet potential avenue to improving heat tolerance and avoiding yield losses in a warming climate.

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          Most cited references143

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          A biochemical model of photosynthetic CO2 assimilation in leaves of C 3 species.

          G. D. Farquhar, S. von Caemmerer, J. A. Berry (1980)
          Various aspects of the biochemistry of photosynthetic carbon assimilation in C3 plants are integrated into a form compatible with studies of gas exchange in leaves. These aspects include the kinetic properties of ribulose bisphosphate carboxylase-oxygenase; the requirements of the photosynthetic carbon reduction and photorespiratory carbon oxidation cycles for reduced pyridine nucleotides; the dependence of electron transport on photon flux and the presence of a temperature dependent upper limit to electron transport. The measurements of gas exchange with which the model outputs may be compared include those of the temperature and partial pressure of CO2(p(CO2)) dependencies of quantum yield, the variation of compensation point with temperature and partial pressure of O2(p(O2)), the dependence of net CO2 assimilation rate on p(CO2) and irradiance, and the influence of p(CO2) and irradiance on the temperature dependence of assimilation rate.
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            Yield Trends Are Insufficient to Double Global Crop Production by 2050

            Deepak Ray, Nathaniel D. Mueller, Paul C West … (2013)
            Several studies have shown that global crop production needs to double by 2050 to meet the projected demands from rising population, diet shifts, and increasing biofuels consumption. Boosting crop yields to meet these rising demands, rather than clearing more land for agriculture has been highlighted as a preferred solution to meet this goal. However, we first need to understand how crop yields are changing globally, and whether we are on track to double production by 2050. Using ∼2.5 million agricultural statistics, collected for ∼13,500 political units across the world, we track four key global crops—maize, rice, wheat, and soybean—that currently produce nearly two-thirds of global agricultural calories. We find that yields in these top four crops are increasing at 1.6%, 1.0%, 0.9%, and 1.3% per year, non-compounding rates, respectively, which is less than the 2.4% per year rate required to double global production by 2050. At these rates global production in these crops would increase by ∼67%, ∼42%, ∼38%, and ∼55%, respectively, which is far below what is needed to meet projected demands in 2050. We present detailed maps to identify where rates must be increased to boost crop production and meet rising demands.
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              Global observed changes in daily climate extremes of temperature and precipitation

              L. V. Alexander, X. -X. Zhang, T. C. Peterson … (2006)
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                Author and article information

                Journal
                Title: Journal of Experimental Botany
                Publisher: Oxford University Press (OUP)
                ISSN (Print): 0022-0957
                ISSN (Electronic): 1460-2431
                Publication date Created: October 01 2019
                Publication date Created: October 15 2019
                Publication date Created: May 30 2019
                Publication date Other: October 01 2019
                Publication date (Print): October 15 2019
                Publication date (Electronic): May 30 2019
                Volume: 70
                Issue: 19
                Pages: 5051-5069
                Affiliations
                [1 ]ARC Centre of Excellence in Plant Energy Biology, Division of Plant Sciences, Research School of Biology, The Australian National University, Canberra, ACT, Australia
                [2 ]Plant Breeding Institute, Sydney Institute of Agriculture & School of Life and Environmental Sciences, The University of Sydney, Narrabri, NSW, Australia
                [3 ]CSIRO Agriculture and Food, Canberra, ACT, Australia
                [4 ]Global Wheat Program, International Maize and Wheat Improvement Center (CIMMYT), Mexico City, Mexico
                [5 ]University of Essex, UK
                Article
                DOI: 10.1093/jxb/erz257
                PubMed ID: 31145793
                SO-VID: c8b30633-776e-4a4b-b31f-1a404fc24ec5
                Copyright © © 2019
                License:

                https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model

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