THE RESPONSE OF FOUR BREAD WHEAT CALTIVARS (Triticum aestivum) TO ABIOTIC STRESS. I- SOME OF MORPHOLOGICAL CHARACTERISTICS,CLOROPHYLL AND THE YIELD
journal of kerbala university,
2013, Volume 9, Issue 2, Pages 196-206
AbstractThe research was conducted to study the stress effect of Fe- with three concentrations of bicarbonate (HCO3-) from KHCO3(0,800,1600 µM/L) in a static nutrient solution as a first experiment Four wheat cultivars namely (Iraq, AL-Fateh, Tahadi and Sally) were grown. Completely Randomized Design (CRD) was adopted. A field experiment with some cultivars was also conducted in a in calcareous soil classified as Typic Torrifluvent. Same treatments of Fe were applied. Split plot design was adopted. Means were compared using L. S. D at 0.05 probability level. Results showed that varieties exposed to Fe stress in development and emersion iron deficiency. Iron deficiency differences between wheat varieties .varieties exposed to Fe,HCO3(800 and 1600 µM/L)stress exhibited iron deficiency phenomenon .Accompany iron deficiency emersion a significant decreased in shoots and roots fresh weight ,especially under Fe ,HCO3 stress assembly. Iraq variety give higher values in shoots and roots fresh weight compared with other varieties .Same behavior was shown in architectures roots .Also Iraq variety gave higher values of total chlorophyll content compared with other varieties. Active iron concentration was significantly decreased when varieties grown under Fe, HCO3 stress. Filed experiment results supported the results of hydroponics experiment. Iraq variety was significantly superior in grains yield (5.667 and 6.187 Mg/ha) in the (-Fe) and (+Fe) respectively, same behavior was shown in all characters. This study suggested a capability to use as important criterion to separate efficient varieties which tolerant to Fe and HCO3 stresses, and to give early signaler to varieties separation to stress tolerance.
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