Cowpea seeds from plants subjected to restricted-and full-irrigation regimes show differential phytochemical activity

Botanical Studies

Table 3 Two-way interaction of irrigation regime × development stage on some physiological traits and leaf nutrients content of cowpea

Irrigation regimes	Development stage	Content of ortho-diphenols	Content of flavonoids	ABTS radical scavenging capacity	DPPH radical scavenging capacity	Leaf N	Leaf P	Leaf K	Mg
Irrigation regimes	Development stage	(mg GA g⁻¹)	(mg CAT g⁻¹ DW)	(mmol Trolox g⁻¹ DW)	(mmol Trolox g⁻¹ DW)	(mg plant⁻¹)
	Immature pods	2.25c	2.45c	0.00d	0.02c	136.8a	52.4a	138.6a	2.39a
Well-watered	Immature seeds	1.84d	2.16d	0.00e	0.02d	126.4b	49.06b	128.8b	2.18b
	Dry seeds	2.37c	2.49bc	0.00d	0.02c	125.9b	48.3b	124.9b	2.11b
	Immature pods	4.51a	2.7a	0.00a	0.03a	95.2c	37.8c	98.2c	1.49c
Drought stress	Immature seeds	4.09b	2.58b	0.00b	0.03b	84.0d	34.5d	87.6d	1.24d
	Dry seeds	3.92b	2.5bc	0.00c	0.03b	96.4c	38.4c	102.6c	1.53c

Each parameter with the same letter is not significantly different according to LSD test at the 5% level of probability