Abstract
ABSTRACT Hydrogen peroxide (H 2 O 2 ) is a signaling molecule that plays a crucial role in plant growth and development against different abiotic stresses. Identifying genetic factors associated with H 2 O 2 regulation and homeostasis can provide valuable insights for improving stress tolerance. Here, we explored genetic diversity of root and shoot traits mediated by H 2 O 2 using a global diversity panel of 150 bread wheat cultivars. The H 2 O 2 treatment significantly reduced root and shoot growth. We calculated relative values and stress tolerance index (STI) of root and shoot traits and performed genome‐wide association studies (GWAS). This led to identification of 108 marker–trait associations including the topmost associations on chromosomes 3B, 2A, 5A, 3B, 5D, 5A, 6B, 4B, and 3B for relative root length, STI root length, relative shoot length, STI shoot length, relative root fresh weight, relative shoot fresh weight, STI shoot fresh weight, and relative and STI root–shoot ratio, respectively. Linkage disequilibrium analysis revealed that major alleles of significant markers were linked with high relative values and STIs for all traits except for relative root length and relative root–shoot ratio. The selected candidate genes were involved mostly in metal ion binding, transmembrane transport, oxidation–reduction process, protein phosphorylation, DNA, and ADP binding processes. These findings provide a fundamental basis for functional analysis of putative candidate genes linked to H 2 O 2 ‐mediated root–shoot growth of wheat. The result will also help to construct genetic map for H 2 O 2 ‐mediated root–shoot growth variation.
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Claims 4
Claim · model-written summary
Hydrogen peroxide significantly reduced wheat root and shoot growth.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- H 2 O 2 treatmente0
- Outcome
- root and shoot growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The H 2 O 2 treatment significantly reduced root and shoot growth.”
t0“Wheat Diversity”
Claim · model-written summary
GWAS identified 108 marker–trait associations for hydrogen peroxide response.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- marker–trait associationse0
- Value
- 108e0
- Qualifier
- chromosomes 3B, 2A, 5A, 3B, 5D, 5A, 6B, 4B, and 3Be0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This led to identification of 108 marker–trait associations including the topmost associations on chromosomes 3B, 2A, 5A, 3B, 5D, 5A, 6B, 4B, and 3B for relative root length, STI root length, relative shoot length, STI shoot length, relative root fresh weight, relative shoot fresh weight, STI shoot fresh weight, and relative and STI root–shoot ratio, respectively.”
t0“Wheat Diversity”
Claim · model-written summary
Major alleles of significant markers were linked to high relative values and stress tolerance indices, except for two relative traits.
- Taxon
- WheatTriticum aestivumt0
- Material
- major allelese0
- Outcome
- relative values and STIse0
- Direction
- highe0
- Qualifier
- except for relative root length and relative root–shoot ratioe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major alleles of significant markers were linked with high relative values and STIs for all traits except for relative root length and relative root–shoot ratio.”
t0“Wheat Diversity”
Claim · model-written summary
Selected candidate genes were mostly associated with the listed cellular functions.
- Taxon
- WheatTriticum aestivumt0
- Gene
- candidate genese0
- Outcome
- metal ion binding, transmembrane transport, oxidation–reduction processe0
- Qualifier
- protein phosphorylation, DNA, and ADP binding processese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The selected candidate genes were involved mostly in metal ion binding, transmembrane transport, oxidation–reduction process, protein phosphorylation, DNA, and ADP binding processes.”
t0“Wheat Diversity”
The same questions in other papers
hydrogen peroxide · growth · Triticum aestivum (wheat)Results differ
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- positive
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- positive
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