Volume 5, Issue 4 (3-2015)
2015, 5(4): 165-175 |
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Nuclear Sci. and Technol. Res. Institute, Karaj, Iran
Abstract: (4918 Views)
In order to investigate the effects of irrigation water salinity on root traits and absorption of sodium (Na+) and potassium (K+) by wheat cultivars, a factorial experiment, based on completely randomized design with 3 replications, was conducted under greenhouse conditions. The main factor was 7 wheat genotypes ]Ghods, Marvdasht and Bahar (sensitive to salinity) and Arg, Bam, Sistani and Singh-2 (tolerant to salinity)] and the second factor was three levels of irrigation water salinity [1.3 (control), 5 and 10 dS/m]. In this study, the effect of salinity stress on root growth traits including root dry weight, root/shoot ratio, root volume and length, Na+/K+ ratio and grain yield were assessed. Results showed that increasing the salinity of irrigation water increased Na+/K+ ratio significantly, other studied traits were decreased significantly, and 10 dS/m salinity treatment caused the most negative effects. Means of the measured traits showed superiority of Arg, Bam, Sistani and Singh-2 cultivars, as compared to three other cultivars. Also, in all the studied traits, the highest percentage of reduction in 10 dS/m salinity, compared to control, was for Marvdasht cultivar, which shows the sensitivity of this genotype. Therefore, considerable superiority of some root characteristics and Na+/K+ ratio in salinity tolerant cultivars of wheat may be useful for screening the salinity tolerant wheat genotypes
Type of Study: Research |
Received: 2015/03/3 | Accepted: 2015/03/3 | Published: 2015/03/3
Received: 2015/03/3 | Accepted: 2015/03/3 | Published: 2015/03/3
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