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Nat Biotechnol
2012 Mar 11;304:360-4. doi: 10.1038/nbt.2120.
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Wheat grain yield on saline soils is improved by an ancestral Na⁺ transporter gene.
Munns R
,
James RA
,
Xu B
,
Athman A
,
Conn SJ
,
Jordans C
,
Byrt CS
,
Hare RA
,
Tyerman SD
,
Tester M
,
Plett D
,
Gilliham M
.
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The ability of wheat to maintain a low sodium concentration ([Na(+)]) in leaves correlates with improved growth under saline conditions. This trait, termed Na(+) exclusion, contributes to the greater salt tolerance of bread wheat relative to durum wheat. To improve the salt tolerance of durum wheat, we explored natural diversity in shoot Na(+) exclusion within ancestral wheat germplasm. Previously, we showed that crossing of Nax2, a gene locus in the wheat relative Triticum monococcum into a commercial durum wheat (Triticum turgidum ssp. durum var. Tamaroi) reduced its leaf [Na(+)] (ref. 5). Here we show that a gene in the Nax2 locus, TmHKT1;5-A, encodes a Na(+)-selective transporter located on the plasma membrane of root cells surrounding xylem vessels, which is therefore ideally localized to withdraw Na(+) from the xylem and reduce transport of Na(+) to leaves. Field trials on saline soils demonstrate that the presence of TmHKT1;5-A significantly reduces leaf [Na(+)] and increases durum wheat grain yield by 25% compared to near-isogenic lines without the Nax2 locus.
Byrt,
HKT1;5-like cation transporters linked to Na+ exclusion loci in wheat, Nax2 and Kna1.
2007, Pubmed
Byrt,
HKT1;5-like cation transporters linked to Na+ exclusion loci in wheat, Nax2 and Kna1.
2007,
Pubmed
Conn,
Magnesium transporters, MGT2/MRS2-1 and MGT3/MRS2-5, are important for magnesium partitioning within Arabidopsis thaliana mesophyll vacuoles.
2011,
Pubmed
Davenport,
The Na+ transporter AtHKT1;1 controls retrieval of Na+ from the xylem in Arabidopsis.
2007,
Pubmed
Davenport,
Control of sodium transport in durum wheat.
2005,
Pubmed
Dick,
The activities and concentrations of sodium and potassium in toad oocytes.
1969,
Pubmed
Dubcovsky,
Mapping of the K(+)/Na (+) discrimination locus Kna1 in wheat.
1996,
Pubmed
Dvořak,
Enhancement of the salt tolerance of Triticum turgidum L. by the Kna1 locus transferred from the Triticum aestivum L. chromosome 4D by homoeologous recombination.
1994,
Pubmed
Gassman,
Alkali cation selectivity of the wheat root high-affinity potassium transporter HKT1.
1996,
Pubmed
,
Xenbase
Gietz,
High-efficiency yeast transformation using the LiAc/SS carrier DNA/PEG method.
2007,
Pubmed
Gilliham,
Cell-specific compartmentation of mineral nutrients is an essential mechanism for optimal plant productivity--another role for TPC1?
2011,
Pubmed
Gorham,
Partial characterization of the trait for enhanced K(+)-Na (+) discrimination in the D genome of wheat.
1990,
Pubmed
Horie,
HKT transporter-mediated salinity resistance mechanisms in Arabidopsis and monocot crop plants.
2009,
Pubmed
Huang,
Comparative mapping of HKT genes in wheat, barley, and rice, key determinants of Na+ transport, and salt tolerance.
2008,
Pubmed
Jabnoune,
Diversity in expression patterns and functional properties in the rice HKT transporter family.
2009,
Pubmed
,
Xenbase
James,
Physiological characterization of two genes for Na+ exclusion in durum wheat, Nax1 and Nax2.
2006,
Pubmed
James,
Major genes for Na+ exclusion, Nax1 and Nax2 (wheat HKT1;4 and HKT1;5), decrease Na+ accumulation in bread wheat leaves under saline and waterlogged conditions.
2011,
Pubmed
James,
Photosynthetic capacity is related to the cellular and subcellular partitioning of Na+, K+ and Cl- in salt-affected barley and durum wheat.
2006,
Pubmed
Koltai,
High throughput cellular localization of specific plant mRNAs by liquid-phase in situ reverse transcription-polymerase chain reaction of tissue sections.
2000,
Pubmed
Läuchli,
Cell-specific localization of Na+ in roots of durum wheat and possible control points for salt exclusion.
2008,
Pubmed
Molendijk,
A cysteine-rich receptor-like kinase NCRK and a pathogen-induced protein kinase RBK1 are Rop GTPase interactors.
2008,
Pubmed
Munns,
Mechanisms of salinity tolerance.
2008,
Pubmed
Munns,
Approaches to increasing the salt tolerance of wheat and other cereals.
2006,
Pubmed
Mäser,
Altered shoot/root Na+ distribution and bifurcating salt sensitivity in Arabidopsis by genetic disruption of the Na+ transporter AtHKT1.
2002,
Pubmed
Møller,
Shoot Na+ exclusion and increased salinity tolerance engineered by cell type-specific alteration of Na+ transport in Arabidopsis.
2009,
Pubmed
Plett,
Improved salinity tolerance of rice through cell type-specific expression of AtHKT1;1.
2010,
Pubmed
Ren,
A rice quantitative trait locus for salt tolerance encodes a sodium transporter.
2005,
Pubmed
Rodríguez-Navarro,
Dual system for potassium transport in Saccharomyces cerevisiae.
1984,
Pubmed
Roy,
Investigating glutamate receptor-like gene co-expression in Arabidopsis thaliana.
2008,
Pubmed
,
Xenbase
Schachtman,
Structure and transport mechanism of a high-affinity potassium uptake transporter from higher plants.
1994,
Pubmed
,
Xenbase
Sunarpi,
Enhanced salt tolerance mediated by AtHKT1 transporter-induced Na unloading from xylem vessels to xylem parenchyma cells.
2005,
Pubmed
Tilman,
Global food demand and the sustainable intensification of agriculture.
2011,
Pubmed
Uozumi,
The Arabidopsis HKT1 gene homolog mediates inward Na(+) currents in xenopus laevis oocytes and Na(+) uptake in Saccharomyces cerevisiae.
2000,
Pubmed
,
Xenbase
Yao,
Differential sodium and potassium transport selectivities of the rice OsHKT2;1 and OsHKT2;2 transporters in plant cells.
2010,
Pubmed
,
Xenbase
