Evaluation the effects of drought Stress Induced by Polyethylene glycol on germination and seedling growth of maize hybrids

Subject Areas : agronomy

Mohammad  Moradi ¹ (1- Assistant Prof., Dep. of Plant Breeding, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran)
Ahmad  Hasnaki Fard ² (2- Master of Arts, Industrial School of Shahid Bahonar Agriculture. Shoushtar, Iran)
Mohammad  Motamedi ³ (1- Assistant Prof., Dep. of Plant Breeding, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran)

Received: 2017-11-22 Accepted : 2018-03-06 Published : 2018-02-20

Keywords: Maize, germination, seedling growth, PEG,

Abstract :

Water deficit is a common and major constrain for agricultural production in arid and semi-arid parts of the world like Iran, to the extent that it might threaten the nation’s food security in years to come. Seed germination is a crucial growth stage that is often affected by environmental stresses, including drought. This study investigated the effects of four levels of water osmotic potential (i.e. 0, -3, -6 and -9 bar) on germination and seedling characteristics, of three maize hybrids )SC500, SC640 and SC704). According to the results, different levels of drought stress, type of cultivar and intraction beatween them had significant effect on measured characteristics. Results also showed that significant decrease was observed in the percentage and rate of germination, radicule and plumule of long and weight and seedling total dry matter. SC500 as a drought-tolerant hybrid, indicated the greatest germination percentage radicle and plumule length, radicle and plumule dry weight than the other cultivars. So, this hybrid was more tolerance to water stress.

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