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

Table 1 The growth parameters of the Ov and Bn plantlets cultured under different inorganic nitrogen concentrations

Parameters	Plant species	Inorganic nitrogen concentration (mM)
Parameters	Plant species	20	40	60	80
Increased biomass (g)	Ov	3.45 ± 0.07a	3.45 ± 0.59a	2.85 ± 0.42a	3.11 ± 0.54a
Increased biomass (g)	Bn	2.41 ± 0.41ab	2.36 ± 0.04b	2.81 ± 0.16ab	3.06 ± 0.28a
Number of shoots	Ov	8.0 ± 1.0ab	8.7 ± 0.6a	6.0 ± 1.0bc	5.0 ± 1.0c
Number of shoots	Bn	5.7 ± 0.6ab	5.0 ± 1.0b	5.7 ± 1.2ab	7.3 ± 0.6a

Ov Orychophragmus violaceus, Bn Brassica napus. The ratio of nitrate to ammonium within each inorganic nitrogen concentration was 2:1. Each value represents the mean ± SD (n = 3). Values signed with the same letter in each line are not significantly different by Tukey’s test (p > 0.05)

ISSN: 1746-4811