Variations of Dry Matter Yield, Some of Osmolytes and Nutrient Elements in Wheat Genotypes (Triticum aestivum L.) under Drought Stress

Subject Areas : Journal of Crop Ecophysiology

Nasibeh Tavakoli ¹ , Ali Ebadi Khazineh ² , Houriyeh Tavakoli ³

1 - pHD student of Crop Physiology, University of Mohaghegh Ardabili, Ardabil,
2 - Associate Professor, Department of Agronomy, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil
3 - PhD. Student of Crop Physiology, Department of Agronomy, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil

Received: 2015-01-20 Accepted : 2015-08-08 Published : 2015-10-23

Keywords: Water deficit, Proline, elements, Wheat genotypes,

Abstract :

To study variations of osmolytes and nutrient elements in wheat genotypes under drought stress a factorial experiment based on completely randomized design with three replications was carried in both greenhouse and laboratory of Mohaghegh Ardabili University, Ardabil, Iran. Treatments consisted of water deficit in three levels (85%, 60% and 35% of field capacity) and five wheat genotypes (Mihan, C-88D-7, C-88D-17, C88D-19 and C88D-20). Results showed that increasing water deficit resulted in reduced amount of potassium, whereas, elements like sodium, phosphorus, proline and soluble sugar were significantly increased. Drought stress, however, reduced the total protein content in C-88D-19, C-88D-17 and C-88D-20 genotypes and, calcium content in ‘Mihan’ and C-88D-19. In the mean time, protein and calcium contents increased in other genotypes in such a way that total protein content of ‘Mihan’ and C-88D-7 and, calcium content of C-88D-20, C-88D- 17 and C-88D-7 were increased with increasing drought stress. Since C-88D-20 showed lowest proline and soluble sugar accumulation and biomass production than other genotypes it would be considered as a sensitive genotype to water stress as compared to the other genotypes.