Evaluation of four Mozambican cowpea landraces for drought tolerance

Figures & data

Figure 1: Cowpea landraces after plants at the third foliar stage were maintained for two weeks under well-watered conditions (right) or exposed for two weeks to drought conditions (left) by withholding water

Figure 2: Effect of drought stress on (a) leaf biomass, (b) root biomass, (c) leaf protein content and (d) leaf protease activity in landraces Massava nhassenje (M), Timbawene moteado (Ti), Namarua (N) and Tete 2 (Te) grown for two weeks under well-watered conditions (closed bars) or drought conditions (open bars) in a temperature-controlled greenhouse. Bars represent the mean biomass ± SE of four individual plants of each landrace. Different letters indicate values that differed significantly at p ≤ 0.05

Figure 3: Effect of drought stress on (a) nodule protein content and (b) nodule protease activity of landraces Massava nhassenje (M), Timbawene moteado (Ti), Namarua (N) and Tete 2 (Te) grown for two weeks under well-watered conditions (closed bars) or drought conditions (open bars) in a temperature-controlled greenhouse. Bars represent the mean biomass ± SE of four individual plants of each landrace. Different letters indicate values that differed significantly at p ≤ 0.05

Table 1: Nodule biomass (fresh weight), nodule number and symbiotic nitrogen fixation (SNF) in four cowpea landraces grown for two weeks under well-watered (WW) and drought (D) conditions in a temperature-controlled greenhouse. Means followed by the same superscript letter within a column are not significantly different as determined by a Tuckey HSD test (P ≤ 0.05). Data are the means of four plants ± SE for each landrace

Landrace	Biomass (g)		Number		SNF (µmol h^-1 plant^-1)
	WW	D	WW	D	WW	D
Massava nhassenje	1.83 ± 0.25^bcd	0.67 ± 0.20^efgh	32.75 ± 1.4^d	15.25 ± 1.4^h	0.99 ± 0.14^bcd	0.06 ± 0.04^fg
Timbawene moteado	2.75 ± 0.21^a	1.02 ± 0.17^e	45.50 ± 4.5^a	27.00 ± 1.7^e	1.39 ± 0.14^a	0.22 ± 0.03^e
Namarua	2.01 ± 0.13^bc	0.99 ± 0.22^ef	43.25 ± 1.9^ab	25.50 ± 2.9^ef	1.08 ± 0.08^bc	0.06 ± 0.02^fgh
Tete 2	2.33 ± 0.35^ab	0.78 ± 0.15^efg	42.75 ± 5.2^abc	25.25 ± 1.7^efg	1.18 ± 0.03^ab	0.10 ± 0.07^f