Evaluation of wheat genotypes for salt tolerance based on some physiological traits

Characterization of Salt Tolerant Wheat (Triticum aestivum) Genotypes on the Basis of Physiological Attributes

“…Saltsensitive genotypes NIA-AS-14-10, 8, 9 and 4 showed higher leaf Na + content accompanied by lower content of K + in response to salinity (Fig. 2a), which confirmed the previous findings (Abbas et al, 2013;Rahman et al, 2014;Hasan et al, 2015). In plants cells the net buildup of sodium (Na + ) might be because of equilibrium between influx via ion channels and efflux through a probable Na + /H + antiporter (Tester and Davenport, 2003).…”

“…It is also obvious from this study that plant biomass and grain yield adversely affected by NaCl salinity among wheat genotypes. Our results are parallel with the observations of Hasan et al (2015) that salt-sensitive genotypes were affected more in their biomass production, succeeded by low final grain yield than salt-tolerant genotypes under saline environment. Upon exposure to salinity, the reduced grain yield could be result of poor tiller formation due to ionic toxicity and osmotic stress created by the excessive salts.…”

“…The obtained data revealed that all wheat genotypes showed a significant (P ≤ 0.05) increase in leaf proline content during salt stress (Table 2). Hence, salttolerant genotypes NRL-1235, Lu-26s and NIA-AS-14-2 showed maximum accumulation of proline which confirmed the previous reports that salt tolerant wheat cultivars generally exhibit higher proline content than the salt sensitive (Hasan et al, 2015;Mahboob et al, 2016). It is obvious from present study that salt stress up-regulated the enzymes involved in biosynthesis and enhanced the level of proline which might be result of proline to stimulate the expression of salt stress respondent genes, which hold proline responsive elements in their promoters (Chinnusamy et al, 2005).…”

“…This response may be in terms of significant increase in concentration of antioxidant phenols along with sugars, proline and glycine betaine, which act as osmoprotectants to secure the plants from salt injury (Khan et al 2014;Desoky and Merwad, 2015;Mahboob et al, 2016). It has been reported that high proline accumulation and chlorophyll contents, high K + /Na + ratio and low Na + , Cl -accumulation have good correlation with salt tolerance in wheat (Hasan et al, 2015). As a huge genetic variability lies in wheat genotypes to tolerate salinity, thus, the use of salt tolerant wheat cultivars might be the most promising strategies for harvesting higher grain yield of best quality under saline conditions (Turki et al, 2012).…”

Influence of salicylic acid on ion distribution, enzymatic activity and some agromorphological characteristics of wheat under salt-affected soil

“…A negative effect has been observed between Na + concentration in floral parts and salt tolerance in terms of grain yield. The results of the current investigation are in full agreement with Rahnama et al (2011) andAbu Hasan et al (2015). (Table 6) as compared to control treatment (without application).…”