Effect of elevated CO2 and moisture stress on the carbon and nitrogen contents in Brassica juncea

The responses of Brassica juncea cv, Pusa Bold to elevated CO2 was studied under water stress. Carbon accumulation in leaves, stem and roots was significantly higher at elevated CO2 concentration, The water stress decreased the carbon content in these plant parts and this adverse effect was reduced by CO2 enrichment. On the contrary nitrogen content of leaves, stem and roots was significantly reduced at elevated CO2. Water stress caused reduction in nitrogen content in these plant parts, similar at ambient as well as elevated CO2 concentration.