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Figure 4 | BMC Plant Biology

Figure 4

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

Figure 4

Accumulation of the GS isoforms in maize roots in response to N sources. The graphs report the levels (%Vol) of the different isoforms evaluated in the root 2D-electrophoretic profiles stained with cCBB (Figure 3) of maize plants grown without N sources for 10 days 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). The graph number and isoform acronyms refer to Figure 3 and Table 1, respectively. A. Spot 1 (GS2a). B. Spot 2 (GS2b). C. Spot 3 (GS2c). D. Spot 4 (GS1-3/4). E. Spot 5 (GS1-5). F. Spot 6 (GS1-1). Graphs show average values ± SE (n = 6). The upper letters indicate differences among the four treatments according to Student’s t-test (p < 0.05).

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