Effect of salt stress on the expression of genes of K+/Na+ -transporters HKT, SOD and Nfn in Triticum durum and Triticum aestivum
The problem of determining the potential of salt tolerance of wheat is one of the most pressing in the selection practice for areas with primary and secondary salinity. One of the ways to overcome the negative impact of the salinity factor is the use of saline-tolerant breeding lines and wheat genotypes. Expression of HKT transporter genes is important for characterizing the salt tolerance of wheat. In genotypes of durum and aestivum wheat Orenburgskaya 10 and Orenburgskaya 22 under salt stress, an increase in the expression of the K+/Na+ genes of transporters of the HKT1 and HKT2 families is observed by 3-4 times. The expression level of SOD and Nfn increases by 2-4 times, which indicates the high adaptive properties of these wheat genotypes to salt stress. Probably, the expression of the HKT, SOD and Nfn genes are interconnected. An increase in the level of expression of the NKT, SOD and Nfn families in roots and leaves under salt stress conditions are associated with the rapid recovery of the K+/Na+ ion balance and the removal of toxic Na+ and ROS ions, i.e. protective function.