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Expression analyses of genes coding for NRT2 in cucumber roots (A) and leaves (B). The plants were treated as described in the legend of Figure 4. Black circles, control (N-deprived plants without nitrate treatment); white circles, N-deprived plants treated with 4 mM nitrate. Relative expression of NRT2 gene was analyzed by real-time RT-PCR. Data processing reported in the legend of Figure 8.
