Abstract
To screen salt tolerance wheat genotypes, germination and seedling growth characters were used as screening criteria. 33 wheat genotypes were tested under 5 different salt concentrations (0, 5, 10, 15 and 20 dSm-1) at central laboratory, Sher-e-bangla Agricultural University, Dhaka-1207, during February to March, 2016. The experiment was conducted with a complete randomize design (CRD) with 5 replications. The results of the experiment revealed that, various germination and seedling growth parameters of the wheat genotypes varied significantly under salt stress. A marked reduction of germination rate, shoot and root length, shoot and root dry weight, relative water content, water retention capacity and vigor index was observed with the increasing of salt concentration for most of the wheat genotypes except ESWYT-5, ESWYT-6 and BARI GOM 28. ESWYT-5, ESWYT-6 and BARI GOM 28 showed consistently better performance against salt stress and there were slow linear reduction was observed with the increasing of salt concentration from 0 to 20 dSm-1. So considering the above fact, ESWYT-5, ESWYT-6 and BARI GOM 28 could be promising salt stress genotype against moderate saline condition.
Highlights
By 2050 the world population will be about 9.10 billion, which will be 34% higher from today and we need to feed another 2.30 billion people with limited resources
In the context of germination percentage to salinity tolerance/sensitivity, it may be concluded that among 33 wheat genotypes ESWYT-5, ESWYT-6 and BARI GOM might be referred as salt tolerance cultivars and BARI GOM as most salinity sensitive cultivar
ESWYT-5, ESWYT-6 and BARI GOM 28 wheat genotypes had shown a slower reduction against the increasing of salt concentration
Summary
By 2050 the world population will be about 9.10 billion, which will be 34% higher from today and we need to feed another 2.30 billion people with limited resources. The salt tolerance species exert a high capacity to resist salt stress through biosynthesis and accumulation of compatible solute These solutes increase the overall osmotic pressure within the cell there by empowering plant cell to affirm both turgor and driving gradient for water absorption Hasegawa et al [20]. Zhu [47] reported that plant faces salt stress condition; affirm a high K+ concentration and low Na+ concentration in the cytosol. They do this by regulation of expression and activity of K+ and Na+ transporters and H+ pumps that creates the driving force for transport. With a view to expand the cultivation and to sustain the yield of wheat in the coastal belt, the present piece of work was implemented to evaluate some agronomic and physiological traits of wheat as screening criteria against salinity condition
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