Elevated carbon dioxide changes grain protein concentration and composition and compromises baking quality. A FACE study

Panozzo, J. F. and Walker, C. K. and Partington, D. L. and Neumann, N. C. and Tausz, M. and Seneweera, S. and Fitzgerald, G. J. (2014) Elevated carbon dioxide changes grain protein concentration and composition and compromises baking quality. A FACE study. Journal of Cereal Science, 60 (3). pp. 461-470. ISSN 0733-5210


Wheat is one of the major crops grown commercially and an important source of nutrition for humans. Changes in grain quality due to increasing levels of atmospheric CO2 could have far-reaching impacts to human diets globally. Future wheat-growing conditions are expected to be impacted by climate change, particularly increases in carbon dioxide. Elevated CO2 (eCO2) has been shown to increase plant growth and yield, yet changes in grain properties also affect product quality.

Using Australian Grains Free Air CO2 Enrichment (AGFACE) technology we investigated the impacts of eCO2 on grain quality over three seasons.

Elevated CO2 consistently decreased baking quality and grain protein percentage was consistently lower under eCO2, and protein composition changed towards a greater glutenin/gliadin ratio. Starch damage and amylograph peak viscosity were consistently reduced in the eCO2 treatment in all years and for all cultivars. For other traits such as grain weight, milling quality, dough rheology, A-type starchgranules and pasting viscosity the same altered effects were not consistent for cultivar or over years. The results suggest that grain and product quality of wheat grown under eCO2 will be compromised in a highCO2 atmosphere, and this may offset some of the potential yield benefits of eCO2.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health
Date Deposited: 28 Jul 2016 03:49
Last Modified: 01 Feb 2018 04:19
Uncontrolled Keywords: free air carbon dioxide enrichment; FACE; elevated carbon dioxide; wheat quality
Fields of Research : 05 Environmental Sciences > 0501 Ecological Applications > 050102 Ecosystem Function
05 Environmental Sciences > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820599 Winter Grains and Oilseeds not elsewhere classified
Identification Number or DOI: 10.1016/j.jcs.2014.08.011
URI: http://eprints.usq.edu.au/id/eprint/28805

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