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|Title:||HKT1;5-like cation transporters linked to Na+ exclusion loci in wheat Nax2 and Kna1|
|Citation:||Plant Physiology, 2007; 143(4):1918-1928|
|Publisher:||Amer Soc Plant Physiologists|
|Caitlin S. Byrt, J. Damien Platten, Wolfgang Spielmeyer, Richard A. James, Evans S. Lagudah, Elizabeth S. Dennis, Mark Tester and Rana Munns|
|Abstract:||Bread wheat (Triticum aestivum) has a greater ability to exclude Na+ from its leaves and is more salt tolerant than durum wheat (Triticum turgidum L. subsp. durum [Desf.]). A novel durum wheat, Line 149, was found to contain a major gene for Na+ exclusion, Nax2, which removes Na+ from the xylem in the roots and leads to a high K+-to-Na+ ratio in the leaves. Nax2 was mapped to the distal region on chromosome 5AL based on linkage to microsatellite markers. The Nax2 locus on 5AL coincides with the locus for a putative Na+ transporter, HKT1;5 (HKT8). The Nax2 region on 5AL is homoeologous to the region on chromosome 4DL containing the major Na+ exclusion locus in bread wheat, Kna1. A gene member of the HKT1;5 family colocates to the deletion bin containing Kna1 on chromosome 4DL. This work provides evidence that Nax2 and Kna1 are strongly associated with HKT1;5 genes.|
|Keywords:||Oryza sativa; Triticum; Cations; Sodium; Cation Transport Proteins; Symporters; Plant Proteins; DNA Primers; Reverse Transcriptase Polymerase Chain Reaction; Ion Transport; Base Sequence; Polyploidy; Alleles; Genes, Plant; Molecular Sequence Data; Genetic Variation|
|Description:||© 2007 American Society of Plant Biologists|
|Appears in Collections:||Agriculture, Food and Wine publications|
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