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 1 Proline accumulations 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 proline (mg/g)	IFBPC proline (mg/g)
NaCl	5.00	13.06 ± 0.14b	16.05 ± 0.04d
	10.00	14.15 ± 0.40bc	12.69 ± 0.03b
	15.00	14.53 ± 0.42 cd	12.07 ± 0.04a
Na₂SO₄	5.00	14.85 ± 0.21d	15.76 ± 0.00e
	10.00	13.75 ± 0.19b	14.38 ± 0.04d
	15.00	12.94 ± 0.24a	13.34 ± 0.04c
Distilled H₂O	0.0	13.77 ± 0.05b	14.26 ± 0.43d

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)