Polynucleotides encoding a NAX2 polypeptide and methods for enhancing salinity tolerance in plants
First Claim
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1. A wheat plant other than a Triticum monococcum wheat plant which is homozygous for a Nax2 gene that encodes a Nax2 polypeptide comprising amino acids whose sequence is at least 95% identical to the sequence set forth in SEQ ID NO:
- 1 and confers enhanced tolerance to saline and/or sodic soils, and/or reduced sodium accumulation in an aerial part of the wheat plant in comparison to a wheat plant that is not homozygous for the Nax2 gene.
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Abstract
The present invention relates to polypeptides, and polynucleotides encoding therefor, with cation transporter activity. In particular, the present invention relates to methods for producing, identifying, and/or breeding transgenic or non-transgenic plants, especially wheat or barley plants, with enhanced tolerance to saline and/or sodic soils, and/or reduced sodium accumulation in an aerial part of the plant. Also provided are plants produced using these methods.
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Citations
17 Claims
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1. A wheat plant other than a Triticum monococcum wheat plant which is homozygous for a Nax2 gene that encodes a Nax2 polypeptide comprising amino acids whose sequence is at least 95% identical to the sequence set forth in SEQ ID NO:
- 1 and confers enhanced tolerance to saline and/or sodic soils, and/or reduced sodium accumulation in an aerial part of the wheat plant in comparison to a wheat plant that is not homozygous for the Nax2 gene.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17)
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10. A method of obtaining a wheat plant, the method comprising;
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i) crossing two wheat plants of the same species of which at least one wheat plant comprises a Nax2 locus comprising an allele that encodes a Nax2 polypeptide comprising amino acids whose sequence is at least 95% identical to the sequence set forth as SEQ ID NO;
1 and confers enhanced tolerance to saline and/or sodic soils, and/or which confers reduced sodium accumulation in an aerial part of the wheat plant, andii) screening progeny wheat plants from the cross for the presence or absence of said Nax2 locus by detecting a nucleic acid molecule of the wheat plant, wherein the nucleic acid molecule is linked to, and/or comprises at least a part of, said Nax2 locus comprising the allele that confers enhanced tolerance to saline and/or sodic soils, and/or that confers reduced sodium accumulation in an aerial part of the wheat plant, wherein progeny with said allele have enhanced tolerance to saline and/or sodic soils, and/or have reduced sodium accumulation in an aerial part of the wheat plant, when compared to progeny lacking said allele. - View Dependent Claims (11, 12, 13)
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Specification