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Figure 1 | BMC Plant Biology

Figure 1

From: Mineral nitrogen sources differently affect root glutamine synthetase isoforms and amino acid balance among organs in maize

Figure 1

Nitrogen and carbon metabolites in maize in response to different inorganic N sources. Concentration of NO3 − (A), NH4 + (B), reducing sugars (C) and sucrose (D) in roots (white bars), xylem sap (grey bars) and leaves (black bars) in maize plants grown for 10 days without N sources and then exposed for the last 30 h to absence of N (c), to 10 mM NO3 − (n), to 10 mM NH4 + (a) or to 5 mM NO3 − + 5 mM NH4 + (na). Graphs show average values ± SE (n = 6). The upper letters indicate differences among the four treatments within each organ according to Student’s t-test (p < 0.05).

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