ROLE OF TRANSMEMBRANE CARRIER OF ABSCISIC ACID NRT1.2 IN THE ADAPTIVE GROWTH RESPONSE OF ARABIDOPSIS PLANTS TO SODIUM CHLORIDE SALINIZATION

The role of the nitrate and ABA transporter (NRT1.2) in the growth response of Arabidopsis plants to sodium chloride salinity was studied. Mutants for this gene (nrt1.2) and plants of the parent Wassilewskija line (Ws) were grown on liquid Hoagland-Arnon medium. NaCl was added to half of the vessels to a final concentration of 150 mmol/l. In Ws plants, salinity led to the accumulation of ABA and IAA in shoots and roots, which was accompanied by a decrease in their mass accumulation and root elongation. In nrt1.2, exposure to sodium chloride caused only a slight decrease in the root to shoot mass ratio. Unlike WS, ABA did not participate in the regulation of this response in the mutant. Conclusions were made about the important role of the transporter in the accumulation of plant mass and root elongation under optimal conditions, as well as in the adaptive growth response of plants to salinity.