Investigation of Salinity Effect on Leaf Proteome Pattern of Triticum boeoticum

Wild relatives of crop plants is an important resource for finding the genes conferring tolerance to salinity. In this study, ten different ecotypes of Triticum boeoticum were planted in greenhouse by using factorial experiment based on completely randomized design. Salt stress was applied at the three-leaf stage and at two levels: zero and 150 mM and were sampled after 15 days from newly full developed blade leaf. The concentration of sodium and potassium were measured in each sample and after that the tolerant ecotype was determined based on concentration of Na and Kﳖ trait. Leaf sample of tolerant ecotype were used for two dimensional electrophoresis. Extracted proteins first isolated based on isoelectric point by using IPG strip with pH 3-10 and then isolated based on molecular weight in the second dimension. The result showed that C11 and C7 that collected from Saghez and Kamiaran respectively were most tolerant populations. Both of B2 and C1 that collected from Harsin and Sanandaj respectively were most sensitive populations. Based on physiological traits, sample C11 was selected for proteomics. According to the proteomics results, the number of repetitive 177 gel spots were identified and statistically analyzed. From total spots, 13 spots showed differential expression under salt stress, from these, the expression of 8 spots (61.5%) increased and 5 spots (38.5%) decreased under salt stress. This means that the C11 is trying to cope with salinity stress by changing the expression of their responsive genes.