Elevated atmospheric CO2 concentration favors Nitrogen partitioning into roots of tobacco plants under Nitrogen deficiency by decreasing Nitrogen demand of the shoot

摘要: Anthropogenic increase of atmospheric CO2 concentration is likely to affect plant growth in natural and agricultural ecosystems. Since nitrogen (N) one the major factors limiting production, we investigated effect elevated on N partitioning at whole-plant level cellular limited supply. Tobacco was grown ambient (400 ppm) (800 concentrations under conditions defined supply with same amount supplied all plants, independent CO2-induced changes actual rate. Under deficiency, high promoted root whereas shoot only slightly increased, which resulted an increased root/shoot ratio. At low supply, decreased tissue, but not roots. Obviously stimulated into roots relative shoots, coincid...