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Content of major polysaccharides and other components in cell wall constituents isolated from leaves of plants growing on NH4+ and NO3– (control) as the only N source. (A) Cellulose and (B) pectin levels were measured in dried cell walls. (C) The proportion of uronic acids and neutral sugars in the pectin-enriched fraction. The content of (D) lignin and (E) phenolics isolated from cell walls. (F) The content of calcium and (G) boron ions in leaf tissues.
