Abstract
The palea and lemma (hull) are grass-specific organs, and determine grain size and quality. In the study, AH2 encodes a MYB domain protein, and functions in the development of hull and grain. Mutation of AH2 produces smaller grains and alters grain quality including decreased amylose content and gel consistency, and increased protein content. Meantime, part of the hull lost the outer silicified cells, and induces a transformation of the outer rough epidermis to inner smooth epidermis cells, and the body of the palea was reduced in the ah2 mutant. We confirmed the function of AH2 by complementation, CRISPR-Cas9, and cytological and molecular tests. Additionally, AH2, as a repressor, repress transcription of the downstream genes. Our results revealed that AH2 plays an important role in the determination of hull epidermis development, palea identity, and grain size.
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Claims 8
Claim · model-written summary
AH2 encodes a MYB domain protein.
- Taxon
- rice
Oryza sativat0 - Gene
- AH2e0
- Outcome
- MYB domain proteine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AH2 encodes a MYB domain protein”
t0“rice”
Claim · model-written summary
AH2 mutation produces smaller grains.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mutation of AH2 produces smaller grains”
t0“rice”
Claim · model-written summary
AH2 mutation decreases amylose content and gel consistency.
- Taxon
- riceOryza sativat0
- Treatment
- Mutation of AH2e0
- Gene
- AH2e0
- Outcome
- amylose content and gel consistencye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mutation of AH2 produces smaller grains and alters grain quality including decreased amylose content and gel consistency”
t0“rice”
Claim · model-written summary
AH2 mutation increases protein content.
- Taxon
- riceOryza sativat0
- Treatment
- Mutation of AH2e0
- Gene
- AH2e0
- Outcome
- protein contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mutation of AH2 produces smaller grains and alters grain quality including decreased amylose content and gel consistency, and increased protein content.”
t0“rice”
Claim · model-written summary
Part of the ah2 mutant hull lost outer silicified cells.
- Taxon
- riceOryza sativat0
- Outcome
- outer silicified cellse0
- Direction
- loste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“part of the hull lost the outer silicified cells”
t0“rice”
Claim · model-written summary
The ah2 mutant outer rough epidermis changed to inner smooth epidermis cells.
- Taxon
- riceOryza sativat0
- Outcome
- transformation of the outer rough epidermis to inner smooth epidermis cellse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“transformation of the outer rough epidermis to inner smooth epidermis cells”
t0“rice”
Claim · model-written summary
The ah2 mutant palea body was reduced.
- Taxon
- riceOryza sativat0
- Material
- ah2 mutante0
- Outcome
- body of the paleae0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the body of the palea was reduced in the ah2 mutant.”
t0“rice”
Claim · model-written summary
AH2 represses transcription of downstream genes.
- Taxon
- riceOryza sativat0
- Gene
- AH2e0
- Outcome
- transcription of the downstream genese0
- Qualifier
- as a repressore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AH2, as a repressor, repress transcription of the downstream genes.”
t0“rice”
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