
TY  - JOUR
A1  - Murillo-Amadot, Bernardo 
A1  - Troyo-Diéguez, Enrique 
A1  - López-Aguilar, Raúl 
A1  - López-Cortés, Alejandro 
A1  - Tinoco-Ojanguri, Clara L. 
A1  - Jones, Hamlyn G. 
A1  - Kaya, Cengiz 
T1  - Matching physiological traits and ion concentrations associated with salt stress in cowpea genotypes
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 2002
VL  - 53
IS  - 11
SP  - 1243
EP  - 1255
KW  - Vigna unguiculata, salt tolerance, genetic variability, ion concentration
UR  - https://doi.org/10.1071/AR01133 
N2  - The salt tolerance of 25 cowpea genotypes (Vigna unguiculata L. Walp.) was studied during early vegetative growth. Salinity treatments were applied by irrigating with a nutrient solution containing 0, 85, and 170 mmol NaCl/L. Seedling survival decreased linearly as salinity increased, but this enabled cowpea genotypes to be ranked for salinity tolerance according to the magnitudes of slopes of regression of survival percentage on salinity. Sodium concentration was higher in roots than in shoots in all genotypes, and increased significantly in both roots and shoots as salinity increased. Chloride concentration in both roots and shoots increased with increasing salinity in all genotypes, and was higher in shoots than in roots at 85 and 170 mmol NaCl/L. In some cases, Ca, Mg, K, and P concentrations were reduced by an increase in salinity, but none of the genotypes appeared to suffer any nutrient deficiency. We observed wide differences in responses to salinity, and our results suggest that during the growth stage studied, 7 of the 25 genotppes tested could be classified as tolerant or relatively tolerant to salinity (Sonorense, CB3, CB27, Cuarente&#241;o, CB46, Pace&#241;o, and IT82D-889). 
ER  -

