عنوان مقاله [English]
Background and Objectives
Seed priming using mineral salts solution and plant growth regulators is a relatively new, simple and inexpensive technique to improve germination percentage, germination rate, early seedling establishment and the other morphophysiological characteristics of the plant under normal and moisture stress conditions. The main objective of this study was to investigate the effect of different seed priming treatments on some morphophysiological characteristics of three bread wheat cultivars in potted planting conditions in farm.
Materials and Methods
In this study, three bread wheat cultivars (including “Rijaw”, “Sardari” and “Karim”) and 11 seed priming treatments (including: hormonal priming, osmo-priming, nutritional priming, hydro-priming with distilled water) and one untreated control treatment were investigated using an experiment conducted as factorial based on Completely Randomized Designs (CRD) with three replicates at Mahidasht Agricultural Research Station, Kermanshah Agricultural and Natural Resources Research and Education Centre, AREEO, Kermanshah, Iran during 2016-2017 cropping seasons.
The effect of cultivar and different seed priming treatments were significant on all studied traits at 1% probability level. “Karim” cultivar had the highest leaf relative water content (79.58%), flag leaf area (15.19 cm2), root volume (30.9 cm3), root dry weight (4.6 g/tube), shoot dry weight (26.7 g/tube),and root/shoot ratio (0.17) and compared to the other cultivars. “Sardari” cultivar was superior to the others cultivars regarding to the plant height (98.4 cm) and root length (118 cm). “Rijaw” cultivar with plant height, root length and flag leaf area equal to 84.4 cm, 113.7 cm and 13.53 cm2 was identified as suitable cultivar for rainfed conditions which can be recommended along to “Sardari” as drought stress tolerant cultivars. “Rijaw” cultivar had the highest chlorophyll index (46.3). The highest leaf relative water content, plant height, flag leaf area and chlorophyll index were belonged to nutritional treatments of urea with 4g/L (81.51%, 89.9 cm, 16.84 cm2 and 47) and zinc sulfate with 0.3% concentration (80.75%, 88.8 cm, 16.13 cm2 and 46), respectively.
The cultivar “Karim” in total had the highest values of grain yield and the all shoot and root measured traits. In current study, seed priming treatments of urea with 4 g/L concentration and zinc sulfate with 0.3% concentration were identified as suitable and superior treatments of seed priming in wheat for dryland conditions. It is suggested that appropriate and superior treatments obtained from the experiment, along with other varieties of bread and durum wheat, should be tested for further studies at different regions of the country with similar climate.