Natural variations in SlSOS1 contribute to the loss of salt tolerance during tomato domestication

Soil salinity is a major constraint on crop cultivability and productivity worldwide (Shabala, 2013). The ion toxicity caused by high salinity is alleviated by the adjustment of cellular Na+ and K+ homeostasis through the functions of ion transporters such as SOS1 (Salt Overly Sensitive 1) and HKT1 (High-Affinity Potassium Transporter 1). SOS1 is a plasma membrane Na+/H+ antiporter mediating Na+ extrusion in root epidermal cells to reduce Na+...