Abstract
Lipoxygenases (LOXs) play vital roles in plant growth and defense. In this study, through genomic and molecular analyses, we discover a major LOX gene (LOX-A4) differentially expressed in Triticum urartu (Tu), the diploid progenitor of A subgenome in polyploid wheat. Compared to Tu accessions carrying wild type gene (LOX-A4W), those bearing mutant allele (LOX-A4m) show better growth but lower stress tolerance. These differences concur with a wider geographical distribution of LOX-A4m accessions than LOX-A4W materials in the Fertile Crescent. Interestingly, only mutant LOX-A4 alleles are detected in 3,516 worldwide tetraploid and hexaploid wheat lines; restoring LOX-A4W expression in common wheat inhibits growth but enhances stress tolerance. Furthermore, genome-wide identity-by-state analysis reveals that polyploid wheat A subgenome is more related to the A genome in 13 LOX-A4m Tu accessions. Thus, our work provides evidence that LOX gene variation shapes plant gene pools and their contributions to polyploid genome formation via regulating growth-defense trade-offs. Triticum urartu is the diploid progenitor of polyploid wheat A subgenome. Here, the authors report an improved genome assembly of T. urartu and uncover a lipoxygenase gene that shapes T. urartu gene pools and their contributions to polyploid wheat A subgenome by regulating growth-defense trade offs.
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Claims 9
Claim · model-written summary
LOX-A4 is differentially expressed in Triticum urartu.
- Taxon
- Triticum urartu
Triticum urartue0 - Gene
- LOX-A4e0
- Outcome
- differentially expressede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a major LOX gene (LOX-A4) differentially expressed in Triticum urartu (Tu)”
Claim · model-written summary
Tu accessions with LOX-A4m grow better than those with LOX-A4W.
- Taxon
- Triticum urartuTriticum urartue1
- Material
- Tu accessionse0
- Gene
- LOX-A4me0
- Outcome
- growthe0
- Direction
- bettere0
- Comparator
- LOX-A4We0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to Tu accessions carrying wild type gene (LOX-A4W), those bearing mutant allele (LOX-A4m) show better growth but lower stress tolerance”
e1“Triticum urartu (Tu)”
Claim · model-written summary
Tu accessions with LOX-A4m have lower stress tolerance than those with LOX-A4W.
- Taxon
- Triticum urartuTriticum urartue1
- Gene
- LOX-A4me0
- Outcome
- stress tolerancee0
- Direction
- lowere0
- Comparator
- LOX-A4We0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to Tu accessions carrying wild type gene (LOX-A4W), those bearing mutant allele (LOX-A4m) show better growth but lower stress tolerance”
e1“Triticum urartu (Tu)”
Claim · model-written summary
LOX-A4m accessions have a wider distribution than LOX-A4W materials in the Fertile Crescent.
- Taxon
- Triticum urartuTriticum urartue1
- Gene
- LOX-A4me0
- Outcome
- geographical distributione0
- Direction
- widere0
- Comparator
- LOX-A4W materialse0
- Setting
- Fertile Crescente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a wider geographical distribution of LOX-A4m accessions than LOX-A4W materials in the Fertile Crescent”
e1“Triticum urartu (Tu)”
Claim · model-written summary
Only mutant LOX-A4 alleles were detected in 3,516 worldwide tetraploid and hexaploid wheat lines.
- Taxon
- wheat
Triticum aestivume0 - Gene
- LOX-A4e0
- Outcome
- mutant LOX-A4 alleles are detectede0
- Value
- 3,516e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only mutant LOX-A4 alleles are detected in 3,516 worldwide tetraploid and hexaploid wheat lines”
Claim · model-written summary
Restoring LOX-A4W expression inhibits growth in common wheat.
- Taxon
- common wheatTriticum aestivume0
- Treatment
- restoring LOX-A4W expressione0
- Gene
- LOX-A4We0
- Outcome
- growthe0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“restoring LOX-A4W expression in common wheat inhibits growth but enhances stress tolerance”
Claim · model-written summary
Restoring LOX-A4W expression enhances stress tolerance in common wheat.
- Taxon
- common wheatTriticum aestivume0
- Treatment
- restoring LOX-A4W expressione0
- Gene
- LOX-A4We0
- Outcome
- stress tolerancee0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“restoring LOX-A4W expression in common wheat inhibits growth but enhances stress tolerance”
Claim · model-written summary
The polyploid wheat A subgenome is more related to A genomes from 13 LOX-A4m Tu accessions.
Verbatim
e0“polyploid wheat A subgenome is more related to the A genome in 13 LOX-A4m Tu accessions”
Claim · model-written summary
An improved genome assembly of T. urartu was reported.
- Taxon
- T. urartuTriticum urartue0
- Outcome
- genome assemblye0
- Comparator
- improvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the authors report an improved genome assembly of T. urartu”