Effect of super absorbent polymer on the morpho-physiological and biochemical characteristics of wheat (Triticum aestivum L.) under water deficit stress

Subject Areas :

Mohammad Reza Kazemi ¹ (Department of Agronomy, Faculty of Agriculture, Islamic Azad University Varamin- Pishva, Varamin-Iran)
Farshad Ghooshchi ² (Department of Agronomy, Faculty of Agriculture, Islamic Azad University Varamin- Pishva, Varamin-Iran)
Pourang Kasraei ³ (Department of Agronomy, Faculty of Agriculture, Islamic Azad University Varamin- Pishva, Varamin-Iran)

Received: 2016-01-14 Accepted : 2016-05-09 Published : 2016-05-21

Keywords: Grain yield, Wheat, Water deficit stress, Protein content, Seed weight, super absorbent polymer,

Abstract :

This experiment studies the effects of super-physiological characteristics of wheat in drought conditions for split plot in a randomized complete block design with three replications. Main plot including different levels of water deficit stress (60, 90 and 120 mm evaporation) and sub plot different amounts of polymer (zero, 15, 30 and 45 kg per ha).30 percent and biomass yield in the order of 6.42 and 10.94 percent increase compared to control polymer. In conditions of severe stress high level of polymer leads to a significant decrease in enzyme activity guaiacol (1.5 times), ascorbate peroxidase (63%), catalase (30%) and glutathione reductase (71%) compared to conditions without polymer. Even moderate levels of water stress leads to a significant reduction in chlorophyll a and b (15 and 24 percent respectively compared to control) was. But more drastic reduction in the amount of chlorophyll a and b in severe water deficit stress levels were observed (38.7, 51% reduction compared to control treatment). Using high polymer surfaces, 30 and 45 kg ha chlorophyll in plants to form a 13.42 and 20.13 percent respectively. Mild stress higher levels of polymers in organic solute had almost the same effect. While severe stress positive impact polymer was 45 kg per hector higher than 30 kg per hectare, and the accumulation of soluble sugars and proline able to hold even under mild stress. The high polymer membrane lipid peroxidation rate decreased, resulting in the production of malondialdehyde as compared to controls 53 percent. Superabsorbent polymer on grain weight, biological yield, grain yield, harvest index, guaiacol peroxidase enzymes, ascorbate peroxidase, glutathione reductase was significant, and in Kalataz the interaction is not significant.