OXIDATIVE STRESS ANTIOXIDANT ENZYMES SYSTEM IN FOUR WHEAT CALTIVARS UNDER ABIOTIC STRESS. II- EFFECT OF Fe,HCO3 STRESSES IN GROWTH ,YIELD AND ANTIOXIDANT ENZYMES IN FOUR DURUM WHEAT CALTIVARS(Triticum durum) .* | ||
| journal of kerbala university | ||
| Article 1, Volume 8, Issue 0, January 2012, Pages 1-20 PDF (0 K) | ||
| Abstract | ||
| To study Genotype difference of Four Durum Wheat varieties under Fe ,HCO3 stress . TOW Experiments were conducted, First experiment uses Hydroponics in this experiment examination four durum wheat varieties (Sinn AL-Jamal, Sinn AL-Fil, Jandolh,Kokart),all varieties are common culture in Iraq .varieties were exposure to Fe and bicarbonate stress in three levels of bicarbonate (0 , 800 , 1600 µM/L), Experiment was setup using complete Randomized Design (CRD).experiment was contained at 21 days. Secondary was field experiment. . All four varieties were culture in calcareous soil , and Foliar application iron in two levels (0 and 30mg/L)from Fe-EDTA . , Experiment setup using split plot design ,Foliar application as main plot and varieties as subplot. Evaluation three antioxidant enzymes (SOD, POD, CAT), Root and shoot Fresh weight, length and diameter of roots active iron , organic acid (Malic, Citric , Oxalic) in Roots and total chlorophyll concentration . Results showed to superior Jandolh variety to given highest shoot and root fresh weight, chlorophyll concentration , when grown under iron stress or in iron efficient. Bicarbonate levels stress(800 and 1600 µM/L) cause increasing in antioxidant enzymes activity (SOD, POD and CAT).This results showed scavenging of ROS level ,and lessen deterioration of cells compounds ,eventual from varieties grown under Fe,HCO3 stress. Exceed increasing in organic acid concentration (Malic, Citric and Oxalic) of all varieties . Jandolh variety give highest values of this enzymes activity and organic acid concentration, and followed sinn AL-Jamal variety. Kokart variety was give lowest values in all characters. Results of field experiment showed superior durum varieties Jandolh varieties to give highest values in all growth and yield characters ,when grow under(-Fe) or in (+Fe).From this two experiments inference efficiency of Jandolh varieties to tolerance Fe and HCO3 stress compared with other varieties under study. This study suggested capability to use antioxidant enzymes activity as important criterion to separation efficiencies varieties which tolerance Fe,HCO3 a biotic stress which general stress in calcareous soils in Iraq. | ||
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