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

► Wheat (Triticum aestivum L. cv. Yitpi) grown at elevated CO2. ► Grain protein and mineral concentrations were analysed. ► Grain protein, Fe, Zn, S and Ca concentrations were significantly reduced at elevated CO2. ► Negative effect of elevated CO2 on wheat grain quality is likely to overcome under condition drought and high temperature.