Rising atmospheric COb>2b> concentration affects mineral nutrient and protein concentration of wheat grain

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• 作者：Nimesha Fernando^a ; Joe Panozzo^b ; Michael Tausz^c ; Robert Norton^a ; ^d ; Glenn Fitzgerald^b ; Saman Seneweera^a ; ^{samans@unimelb.edu.au}
• 关键词：Free-Air Carbon dioxide Enrichment (FACE) ; Iron ; Grain mineral composition ; Protein ; Zinc
• 刊名：Food Chemistry
• 出版年：2012
• 期刊代码：48_03088146
• 类别：abs
• 出版时间：15 August, 2012
• 卷：133
• 期：4
• 页码：1307-1311
• 文件大小：247 K

摘要

Wheat (Triticum aestivum L. cv. Yitpi) was grown in the Australian Grains Free-Air Carbon dioxide Enrichment (AGFACE) facility under current ambient [COb>2b>] (384 渭mol mol^鈭?) and elevated [COb>2b>] (550 渭mol mol^鈭?) in combination with two different times of sowing (TOS) to investigate the interactive effect of [COb>2b>] 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 [COb>2b>] and the largest reduction in grain protein was observed at the later TOS (TOSb>2b>). Concentration of grain S, Ca, Fe and Zn were also significantly decreased at elevated [COb>2b>]. Most of the grain mineral nutrient concentrations were significantly increased at the TOSb>2b> suggesting that rising temperature together with increased water stress are likely to offset some of the negative effects of elevated [COb>2b>] on grain mineral concentrations.