Polyethylene Glycol (PEG) Induced Changes in Germination, Seedling Growth and Water Relation Behavior of Wheat (Triticum aestivum L.) Genotypes

Most Faijunnahar,Md Ahsan Habib,H M M Tariq Hossain,Abdullahil Baque

doi:10.13189/ujps.2017.050402

Most Faijunnahar, Md Ahsan Habib + Show 2 more

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https://doi.org/10.13189/ujps.2017.050402

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Abstract

Pre-sowing seed treated with Polyethylene Glycol (PEG) assumed to be a potential priming agent to increase the germination, seedling growth and water relation behavior of grain. With this view, a lab investigation was carried out to find out the effect of various PEG concentrations on the germination, seedling growth and water relation behavior of wheat. Seeds of ESWYT-5, ESWYT -6 and ESWYT-7 wheat genotypes and BARI Gom 28 were pre-soaked in water with 0%, 5%, 10%, 15% and 20% PEG solutions. Results of the study revealed that seed priming enhanced germination, seedling growth and water relation behavior of wheat genotypes. Among four wheat genotypes, ESWYT-5 performed the best regarding germination, seedling growth and water relation behavior where wheat genotypes ESWYT-6 and BARI Gom 28 performed moderately and ESWYT-7 showed consistently poor performance. All the characters showed the best results when wheat seeds treated with 10% PEG solution compared to nonprime and hydro primed seeds and the value decreased gradually with increasing PEG concentration. These results suggest that seed priming had significant effect to boost the germination, seedling growth and water relation behavior of wheat genotypes.

Highlights

Wheat (Triticum aestivum L.), 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 hectors globally WHEAT [1]
Germination percentage (GP) increases with the increasing of Polyethylene Glycol (PEG) concentration up to 10% there was a gradual decrease observed with increasing the PEG concentration
The result revealed that the maximum relative water content (90.05%) was found from ESWYT-5 (V1) under 10% PEG concentration and the minimum relative water content (61.63%) was found from ESWYT-7 (V4)with 0% PEG concentration

Summary

Introduction

Wheat (Triticum aestivum L.), 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 hectors globally WHEAT [1]. Despite the some positive impact of stress but it is not suitable for on seed germination, especially for salt and drought stress For this reason, seed priming is considered as an effective means to enhance stress tolerance capability of plant under adverse conditions (especially salinity and drought). The physiological condition of plants in which plants can faster or better activate defense responses or both is called the primed condition of the plant Beckers and Conrath, [3] It optimizes seed performance by rapid and uniform germination, healthy and vigorous seedlings growth reaching a physiological condition resulted in faster and better germination and the emergence of different crops Basra et al [4], Cantliffe [5], Powell et al [6] and Taylor et al [7]. Carbineau and Come [8] and Ashraf and Foolad [9] reported that, under stress condition primed seedling able to grow normally without any disturbance

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