The effects of Exchangeable Sodium Percentage (ESP) of irrigation water on chemical markers and yield ofwheat(Triticum aestivum L.) cultivars

Wheat (Triticum aestivum L.) is an important crop for dry regions in Iran. This study was conducted todetermine the differences of yield and Chemical markers such as Di-hydroxy guanizine (8-oH-dg) and Di-Tyrosine(Di-Ty) with affected by saline water in two wheat cultivars in 2013. In this work, the activity of Di-Ty and 8-oH-dgin wheat cultivars (Omid and Karaj 1) were investigated in response to ESP of irrigated water. The ranges of ESP inirrigation water were varied from 11.5 to 12.5 meq lit−1.The results showed that Karaj 1 was more sensitive thanOmid in response to sodium. About 29.2% more content of Di-Ty and 8-oH-dg was found in Karaj 1 than Omid, andthis was the main reason for decreased about 17.8% of average final yield in this cultivar when ESP was 12.5 meqlit−1.We concluded that the rate of Di-Ty and 8-oH-dg was the major factor for increased the effects of sodium inwheat.

The effects of Exchangeable Sodium Percentage (ESP) of irrigation water on chemical markers and yield ofwheat(Triticum aestivum L.) cultivars Keywords:

Wheat , ESP , Di-Tyrosine and Di-hydroxy guanozine