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| Na+/H+ Antiporter and Its Relationship With Plant Salt Tolerance |
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Abstract Na+/H+ antiporter plays an important role in plant salt toletance. There are two types of Na+/H+ antiporter in plant. One is the SOS1, which localizes in plasma menbrane, the other is AtNHX1, which localized in tonoplast. The plasma menbrance Na+/H+ antiporter is responsible for the transport of Na+ out of the cell, while the tonoplast Na+/H+ antiporter is responsible for the transportion of Na+ from cytoplasm into vacuole. Therefore, these two types of antiporters were considered as key proteins for plant salt tolerance. Recently, many evidences have shown that overexpression of a plasma menbrance Na+/H+ antiporter SOS1 and a tonoplast Na+/H+ antiporter AtNHX1 can increase salt tolerance of plants. This review mainly focused on the latest progress in the study of Na+/H+ antiporter and its relationship with plant salt tolerance.
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Received: 29 December 2005
Published: 25 May 2006
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