Root characteristics, Na+/K+ ratio and grain yield of seven wheat genotypes under salinity stress

摘要

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 Keywords: Root length and volume, Root dry weight, Root?/?Shoot ratio Full-Text Type of Study: Research | Subject: Container Production and Growth Media Received: 2015/03/3 | Accepted: 2015/03/3 | Published: 2015/03/3 Send email to the article author Related Websites Scientific Publications Commission - Health Ministry Scientific Publications Commission - Science Ministry Yektaweb Company Site Keywords ?????, Academic Journal, Scientific Article, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ?? Vote ? 2015 All Rights Reserved | Journal of Science and Technology of Greenhouse Culture -Isfahan University of Technology