Plant responses to increased carbon dioxide

Seneweera, S. and Norton, R. M. (2011) Plant responses to increased carbon dioxide. In: Crop adaptation to climate change. Wiley-Blackwell Publishing Ltd., Chichester, West Sussex. United Kingdom, pp. 198-217. ISBN 978-081382016-3

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Abstract

Rising atmospheric carbon dioxide (CO2) enhances carbon uptake in C3 plants and reduces stomatal conductance in C3 and C4 plants. Even though leaf N declines, RuBisCO activity increases so the photosynthetic rate rises as does photosynthetic N use efficiency. The responses show high variability, and while the magnitude of this 'fertilization' effect appears to be confounded with experimental conditions. Growth of C3 plants increased by up to 25% and grain yield somewhat less. C3 plants are more responsive that C4 plants and legumes more responsive than grasses. Photosynthetic acclimation to high CO2 constrains the response of current genotypes. Improved understanding of plant N dynamics and fine and cause of RuBisCO coupled to balancing sink numbers is the basis of developing crops for a carbon rich future. To do so require screening of large numbers of genotypes under high [CO2] and then exploit those traits using modern biotechnology tools. This is to be done against the other abiotic challenges of drought and thermotolerance, as well as responding to a host of new biotic challenges thrown up by changing global climates.


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Item Type: Book Chapter (Commonwealth Reporting Category B)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2011 John Wiley & Sons, Inc. Permanent restricted access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 01 Jul 2014 06:12
Last Modified: 18 Apr 2017 01:44
Uncontrolled Keywords: acclimation; elevated CO2; FACE; morphology; nitrogen; photosynthesis; RuBisCO
Fields of Research : 04 Earth Sciences > 0401 Atmospheric Sciences > 040104 Climate Change Processes
06 Biological Sciences > 0607 Plant Biology > 060702 Plant Cell and Molecular Biology
04 Earth Sciences > 0401 Atmospheric Sciences > 040101 Atmospheric Aerosols
Socio-Economic Objective: D Environment > 96 Environment > 9602 Atmosphere and Weather > 960202 Atmospheric Processes and Dynamics
Identification Number or DOI: 10.1002/9780470960929.ch6
URI: http://eprints.usq.edu.au/id/eprint/25404

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