Abstract
Pre-sowing seed treated with Polyethylene Glycol (PEG) believed to be a potential priming agent to increase the germination, seedling growth and water relation behavior of crop plants under salt stress condition. With this view, a lab investigation was carried out to find out the effect of PEG on the germination, seedling growth and water relation behavior of wheat under different salt levels. Seeds of ESWYT 5, ESWYT 6 wheat genotypes and BARI Gom 28 were pre-soaked in 10%PEG solutions for 9 h and allowed to grow under 5 levels of salt concentrations viz.,0, 5, 10, 15 and 20 dSm-1.Findings of the research work showed that seed priming with 10% PEG solution for 9 h had significant effect on germination, seedling growth and water relation behavior of wheat genotypes under salt stress condition. Among three wheat genotypes, ESWYT 5 performed the best regarding germination, seedling growth and water relation behavior where wheat genotypes ESWYT-6 performed moderately and BARI Gom 28 showed poor performance. With increasing the salinity level the decreasing of germination, seedling growth and water relation behavior was normal phenomena but in this experiment, priming helped to reduce the magnitude of reduction. These results suggest that seed priming had significant effect to trigger the germination, seedling growth and water relation behavior of wheat genotypes under salt stress condition.
Highlights
Wheat (TriticumaestivumL.), one of the most significant staples food crop, it accounts for about 20% of the human food supply and is cultivated on approximately 215 million ha globally [1]
Wheat genotype ESWYT-6 moderately performed under different saline levels
The result of the experiment revealed that, the maximum germination coefficient (18.01) was recorded from wheat genotype ESWYT-5 at 0 dSm-1 salt concentrations followed by ESWYT-6 (V2) (17.80) and the minimum water retention capacity (11.48) was recorded from BARI Gom 28 at 20 dSm-1 salt concentrations
Summary
Wheat (TriticumaestivumL.), one of the most significant staples food crop, it accounts for about 20% of the human food supply and is cultivated on approximately 215 million ha globally [1]. The world agriculture in 21st century faces versatile challenges such as water, temperature, light, and salts that regulate seed germination interact in the soil interface [10]. These factors may act as stress, leading to injury and even death of the plant in extreme cases [11]. Condition and find out the suitable salt stress wheat seeds with lower osmotic potential fail to absorb water; cultivar(s) for seed industry for successful crop production increase the accumulation of toxic ions (Na+ and Cl-) and in different regions especially salt intrusion belt in there is a delay, decrease and disruption of seed Bangladesh.
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