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Nitrogen remobilization efficiency in response to environmental stresses. (A–C) Proportion of total 15N in rosette (A), stem (B), and seeds (C) in plants grown in the six environments. (D) N remobilization efficiency (NRE) of plants growing in the six environments. The means ±SE of the eight genotypes are shown. Asterisks indicate the significance of the difference between the means of the control and stress conditions: *P<0.05, **P<0.01, ***P<0.001, n≥112.
