The effect of pretreatment with different concentrations of urea on physiological and biochemical properties of maize (Zea mays L.) under Salinity Stress

Subject Areas :

Homa Zarei ¹ (M.Sc. Student of Seed Science and Technology, University of Mohaghegh Ardabili Faculty of Agriculture and Natural, Ardabil, Iran)
Mohammad Sedghi ² (Professor, Department of Agronomy and Plant Breeding, University of Mohaghegh Ardabili Ardabil, Iran)
Salim Farzaneh ³ (Assistant Professor of Agriculture Department, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabili, Iran)
Haniyeh Saadat ⁴ (Ph.D in Ecology,University of Mohaghegh Ardabili, Faculty of Agriculture and Natural Resources, Department of Agronomy and Plant Breeding)

Received: 2023-12-09 Accepted : 2024-04-10 Published : 2024-05-30

Keywords: Antioxidant enzymes, Priming, Sodium chloride, Urea,

Abstract :

In order to investigate Effect of different concentrations of urea on physiological and biochemical properties of maize (Zea mays L.) under Salinity Stress a factorial experiment was conducted based on completely randomized design at the University of Mohaghegh Ardabili in 2021. The investigated factors were different levels of salinity (zero, 100 and 200 mM) and different levels of urea solution (zero, 1.5 and 3%). The results showed that salinity stress decreased Germination Percentage (GP), Germination Rate (GR), Germination uniformity (GU), Radicle and Pedicel Length (RL and PL) and Radicle Fresh and Dry Weight (RFW and RDW), But priming with urea improved these traits. The highest Medium Germination Time (MGT) was related at 200 mM salinity and control (distilled water). The activity of catalase and peroxidase enzymes increased with salinity intensification and the highest amount was observed at 200 mM salinity. Priming with 3% urea solution improved these enzymes. The superoxide dismutase enzyme activity in priming with 3% urea and 200 mM salinity compared to the control showed an increase about 61%. Amylase and protein in pretreatment with urea 3% and without salinity compared to the control showed an increase respectively about 73% and 70%. According to the observed results, seeds primed with 3% urea solution had the greatest effect on salinity stress in maize. According to the observed results, seeds primed with 3% urea solution had the greatest effect on salinity stress in maize.

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