HKT1;5-like cation transporters linked to Na+ exclusion loci in wheat Nax2 and Kna1
Date
2007
Authors
Byrt, C.
Platten, J.
Spielmeyer, W.
James, R.
Lagudah, E.
Dennis, E.
Tester, M.
Munns, R.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Plant Physiology, 2007; 143(4):1918-1928
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
Conference Name
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.
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Dissertation Note
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Description
© 2007 American Society of Plant Biologists