Overexpression of a plasmalemma Na/H antiporter from the halophyte Nitraria sibirica enhances the salt tolerance of transgenic poplar.

The plasmalemma Na/H antiporter Salt Overly Sensitive 1 (SOS1) is responsible for the efflux of Na from the cytoplasm, an important determinant of salt resistance in plants. In this study, an ortholog of SOS1, referred to as NsSOS1, was cloned from Nitraria sibirica, a typical halophyte that grows in deserts and saline-alkaline land, and its expression and function in regulating the salt tolerance of forest trees were evaluated. The expression level of NsSOS1 was higher in leaves than in roots and stems of N.

Overexpression of high affinity K transporter from Nitraria sibirica enhanced salt tolerance of transgenic plants.

Nitraria sibirica Pall is a halophytic shrub growing in desert steppe zones. It exhibits extraordinary adaptability to saline-alkali soil, drought, and sand burial. In this study, the high-affinity K transporter NsHKT1 was identified and found to play a key role in salt tolerance in N.