Rising atmospheric CO2 concentration affects mineral nutrient and protein concentration of wheat grain

Fernando, Nimesha and Panozzo, Joe and Tausz, Michael and Norton, Robert and Fitzgerald, Glenn and Seneweera, Saman (2012) Rising atmospheric CO2 concentration affects mineral nutrient and protein concentration of wheat grain. Food Chemistry, 133 (4). pp. 1307-1311. ISSN 0308-8146


Wheat (Triticum aestivum L. cv. Yitpi) was grown in the Australian Grains Free-Air Carbon dioxide Enrichment (AGFACE) facility under current ambient [CO2] (384 μmol mol -1) and elevated [CO2] (550 μmol mol -1) in combination with two different times of sowing (TOS) to investigate the interactive effect of [CO2] and grain filling conditions on wheat grain quality. Grains were sampled at harvest maturity and their protein and mineral nutrient (Ca, S, Zn and Fe) concentrations were measured. Protein concentration of the grain was decreased by 12.7% at elevated [CO2] and the largest reduction in grain protein was observed at the later TOS (TOS 2). Concentration of grain S, Ca, Fe and Zn were also significantly decreased at elevated [CO2]. Most of the grain mineral nutrient concentrations were significantly increased at the TOS 2 suggesting that rising temperature together with increased water stress are likely to offset some of the negative effects of elevated [CO2] on grain mineral concentrations.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2012 Elsevier Ltd. Published version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 01 Jul 2014 04:20
Last Modified: 22 Mar 2017 01:47
Uncontrolled Keywords: free-air carbon dioxide enrichment; FACE; grain mineral composition; iron; protein; zinc
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070305 Crop and Pasture Improvement (Selection and Breeding)
15 Commerce, Management, Tourism and Services > 1503 Business and Management > 150313 Quality Management
04 Earth Sciences > 0401 Atmospheric Sciences > 040101 Atmospheric Aerosols
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820507 Wheat
Identification Number or DOI: 10.1016/j.foodchem.2012.01.105
URI: http://eprints.usq.edu.au/id/eprint/25399

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