Review Article
Ion Transporters and Abiotic Stress Tolerance in Plants
Table 1
Plant ion transporters involved in salt tolerance identified by functional analysis.
| Name | Source species | Gene product | Function | Identification method | Harbourg species | Reference |
| | | | Sodium influx | | | |
| AtHKT1 | A. thaliana | Na+ transporter | Na+/K+ homeostasis | Mutation | Arabidopsis | [13] | HKT1 | T. aestivum | Na+/K+ transporter | K+/Na+ homeostasis | Overexpression | Wheat | [31] |
| | | | Sodium efflux | | | |
| AtSOS1 | A. thaliana | Plasma membrane Na+/H+ antiporter | Na+ detoxification | Mutation | Arabidopsis overexpression | [76] | TaSOS1 | T. aestivum | Plasma membrane Na+/H+ antiporter | Na+ detoxification | Mutation | Arabidopsis overexpression | [99] |
| | | | Sodium compartmentation | | | |
| AtNHX1 | A. thaliana | Vacuolar Na+/H+ antiporter | Na+ vacuolar sequestration | Overexpression | Arabidopsis, | [11] | Cabbage, tomato | [93] | TNHX1 | T. aestivum | Vacuolar Na+/H+ antiporter | Na+ vacuolar sequestration | Overexpression | Arabidopsis | [96, 114] | AVP1 | A. thaliana | Vacuolar H+-PPase | H+ transport, vacuolar acidification | Overexpression | Arabidopsis | [15] | TVP1 | T. aestivum | Vacuolar H+-PPase | H+ transport, vacuolar acidification | Overexpression | Arabidopsis | [96, 114] |
| | | | Regulatory genes | | | |
| SOS2 | A. thaliana | Serine/threonine Protein kinase | SOS1 regulator | Mutation | Arabidopsis | [87] | SOS3 | A. thaliana | Ca++ binding protein | Ca++ sensor/SOS2 activator | Mutation | Arabidopsis | [81] |
|
|