|Drought stress effects on wheat are mitigated by atmospheric CO2 enrichment (March 2007)|
The atmospheric CO2 concentration is predicted to increase from a current value of 385 ppmv to about 500-650 ppmv by 2050, to generate a rise in global surface temperature and to change seasonal precipitation. This could aggravate the severity of summer drought conditions and affect crop yields. A study of wheat grown at high CO2 concentrations of 671-684 ppmv shows that CO2 enrichment increased wheat biomass and grain yield by more than 44% under drought stress conditions. The findings thus indicate that the increase in atmospheric CO2 concentration could attenuate the effects of summer drought on wheat grain yield.
Drought stress effects on wheat are mitigated by atmospheric CO2 enrichment