Ion Transporters and Abiotic Stress Tolerance in Plants : Table 1

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]
AtNHX1	A. thaliana	Vacuolar Na⁺/H⁺ antiporter	Na⁺ vacuolar sequestration	Overexpression	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]