. 2022 Mar 28;11(7):894. doi: 10.3390/plants11070894

Table 2.

Activities of N assimilation enzymes in the roots of T. distichum under three N treatments.

Treatments	NR Activity μmol h⁻¹ mg⁻¹ Protein	NiR Activity μmol h⁻¹ mg⁻¹ Protein	GS Activity μmol h⁻¹ mg⁻¹ Protein	GDH Activity μmol h⁻¹ mg⁻¹ Protein	GOGAT Activity μmol h⁻¹ mg⁻¹ Protein
CK	0.58 ± 0.02 ^c	2.43 ± 0.04 ^c	0.33 ± 0.00 ^b	1.04 ± 0.06 ^b	0.78 ± 0.03 ^b
1 mM ¹⁵NH₄⁺	0.87 ± 0.02 ^b	3.25 ± 0.08 ^a	0.46 ± 0.22 ^a	1.54 ± 0.08 ^a	1.24 ± 0.03 ^a
1 mM ¹⁵NO₃⁻	1.92 ± 0.04 ^a	2.72 ± 0.01 ^b	0.34 ± 0.01 ^b	1.01 ± 0.04 ^b	0.74 ± 0.01 ^b

Different letters behind the values in the same column indicate significant differences between the treatments according to Duncan’s Multiple Range Test at 5% level. NR: nitrate reductase; NiR: nitrite reductase; GS: glutamine synthetase; GDH: glutamate dehydrogenase; GOGAT: glutamate synthetase.