Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/43534
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Type: Journal article
Title: HKT1;5-like cation transporters linked to Na+ exclusion loci in wheat Nax2 and Kna1
Author: Byrt, C.
Platten, J.
Spielmeyer, W.
James, R.
Lagudah, E.
Dennis, E.
Tester, M.
Munns, R.
Citation: Plant Physiology, 2007; 143(4):1918-1928
Publisher: Amer Soc Plant Physiologists
Issue Date: 2007
ISSN: 0032-0889
1532-2548
Statement of
Responsibility: 
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
RMID: 0020076406
DOI: 10.1104/pp.106.093476
Appears in Collections:Agriculture, Food and Wine publications

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