Antioxidant enzymes and non-enzymatic antioxidants as defense mechanism of salinity stress in cowpea (Vigna unguiculata L. Walp)—Ife brown and Ife bpc

Bulletin of the National Research Centre

Table 3 Glutathione (GSH) contents in the leaves of Ife brown (IFB) and Ife bpc (IBPC) under NaCl and Na₂SO₄ salinity stress

Treatment	Conc (dS/m)	Biochemical parameters (mean ± SE)
Treatment	Conc (dS/m)	IFB GSH (µm/g)	IFBPC GSH (µm/g)
NaCl	5.00	125.75 ± 0.11b	138.97 ± 0.11d
	10.00	130.42 ± 0.12d	123.65 ± 0.13ab
	15.00	132.29 ± 0.21e	120.64 ± 0.12a
Na₂SO₄	5.00	128.52 ± 0.13c	138.29 ± 0.12d
	10.00	126.04 ± 0.26b	131.49 ± 0.12c
	15.00	123.81 ± 0.23a	125.30 ± 0.87b
Distilled H₂O	0.0	127.37 ± 1.36bc	131.91 ± 2.76c

Means followed by different letters in the column are significantly different (P < 0.05) from one another using Duncan’s new multiple range test (DNMRT)