Adaptation of Cowpea (Vigna unguiculata (L.) Walp.) to Water Deficit during Vegetative and Reproductive Phases Using Physiological and Agronomic Characters

Table 2

Average physiological parameters under drought stress at reproductive phase.

	R0	R2	R0	R2	R0	R2	R0	R2
	Fv/Fm		RWC (%)		Chlorophyll content		Proline (mg/g. MS)
Variety	0.742a	0.695b	81.76a	49.76b	42.29a	39.18b	25.71a	28.25a
value	1.641e − 13		2.2e − 16		0.03879		0.0895 NS
V1	0.724^g	0.683^i	81.90 ^ab	14.05^h	38.40^e	48,43^a	20.49 ^ef	23.53^bcdef
V2	0.769 ^ab	0.755^c	83.34 ^ab	85.48^a	46.20^b	37,10^c	26.27 ^cd	25.24 ^bcdef
V3	0.737^e	0.705^d	79.51 ^ab	15.48^h	38.66^e	37.40^c	19.79 ^ef	20.31^cdef
V4	0.720^g	0.601^m	82.02 ^ab	72.41^b	39.00^e	38.03^c	18.05^f	17.74 ^def
V5	0.746^d	0.757^c	83.60 ^ab	79.97^a	45.55^b	40.45 ^bc	27.76^c	32.72 ^bc
V6	0.713^h	0.697^e	78.00 ^ab	12.028^h	39.18^e	34.23^d	20.48 ^ef	16.81 ^ef
V7	0.767^b	0.683^i	82.37 ^ab	58.95^c	43.85 ^cd	49.85^a	38.44^a	37.06 ^ab
V8	0.747^d	0.636^l	79.97 ^ab	84.25^a	39.53^e	41.65^b	20.51 ^ef	21.31 ^cdef
V9	0.770 ^ab	0.674^j	83.06 ^ab	16.17^h	49.07^a	49.85^a	38.17^a	31.70^bcd
V10	0.762^c	0.684 ^hi	76.02b	47.02^e	38.80^e	40.43 ^bc	27.07^c	33.01 ^bc
V11	0.749^d	0.664^k	79.22 ^ab	82.32^a	42.98^d	40.60 ^bc	26.14 ^cd	21.05 ^cdef
V12	0.722^g	0.693^f	81.78 ^ab	36.16^f	38.48^e	40.63 ^bc	23.35 ^de	29.99 ^bcde
V13	0.748^d	0.707^d	84.88^a	15.32^h	49.05^a	50.33^a	28.39^c	28.53 ^bcdef
V14	0.725^g	0.689^g	83.67 ^ab	21.66^g	38.78^e	40.50^bc	18.30^f	29.17 ^bcde
V15	0.772^a	0.760^b	84.69^a	83.80^a	44.73 ^bc	48.60^a	31.08^b	36.73 ^ab
V16	0.714^h	0.761 ^ab	82.08 ^ab	85.51^a	38.38^e	40.13 ^bc	27.71^c	45.09^a
V17	0.733^f	0.708^d	81.07 ^ab	11.48^h	43.55^cd	40.50 ^bc	23.25 ^de	28.64^bcdef
V18	0.750^d	0.686^h	81.03 ^ab	36.22^f	38.38^e	38.00^c	18.72^f	25.95 ^bcdef
V19	0.713^h	0.763^a	82.24 ^ab	85.69^a	39.50^e	38.38 ^bc	38.43^a	45.59^a
V20	0.759^c	0.599^m	84.88^a	51.32^d	49.70^a	50.70^a	21.85 ^ef	14.90^f
value	2.2e − 16	2.2e − 16	0.00529	2.2e − 16	2.2e − 16	2.2e − 16	2.2e − 16	3.14e − 09
LSD at 0.05	0.14	0.08	4.43	4.27	2.10	3.36	2.56	8.16

Means with the same letter within a column are not significantly different. V1 to V20 are the 20 varieties used in this study. R2 is the water regime at the reproductive stage.