Nitrate assimilation is inhibited by elevated CO 2 in field-grown wheat

摘要: Total protein and nitrogen concentrations in plants generally decline under elevated CO 2 atmospheres,. Explanations for this decline include that plants under elevated CO 2 grow larger, diluting the protein within their tissues,; that carbohydrates accumulate within leaves, downregulating the amount of the most prevalent protein Rubisco; that carbon enrichment of the rhizosphere leads to progressively greater limitations of the nitrogen available to plants; and that elevated CO 2 directly inhibits plant nitrogen metabolism, especially the …