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Fig. 3 | Plant Methods

Fig. 3

From: Differential contributions of NO3/NH4+ to nitrogen use in response to a variable inorganic nitrogen supply in plantlets of two Brassicaceae species in vitro

Fig. 3

The foliar δ15N values of the Ov (a, c)and Bn (b, d) plantlets cultured under different inorganic nitrogen concentrations. Ov Orychophragmus violaceus, Bn Brassica napus. The ratio of nitrate to ammonium within each inorganic nitrogen concentration was 2:1. The mean ± SD (n = 3) followed by different letters in the same legend differ significantly (Tukey’s test, p < 0.05)

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