Abstract
Recent advances in rice flowering studies have shown that the accurate control of flowering by photoperiod is regulated by key mechanisms that involve the regulation of flowering genes including Heading date1 (Hd1), Early hd1 (Ehd1), Hd3a, and RFT1. The chromatin mechanism involved in the regulation of rice flowering genes is presently not well known. Here we show that the rice enhancer of zeste [E(z)] genes SDG711 and SDG718, which encode the polycomb repressive complex2 (PRC2) key subunit that is required for trimethylation of histone H3 lysine 27 (H3K27me3), are respectively, involved in long day (LD) and short day (SD) regulation of key flowering genes. The expression of SDG711 and SDG718 is induced by LD and SD, respectively. Over-expression and down-regulation of SDG711 respectively, repressed and promoted flowering in LD, but had no effect in SD. By contrast, down-regulation of SDG718 had no effect in LD but delayed flowering in SD. SDG711 and SDG718 repressed OsLF (a repressor of Hd1) respectively in LD and SD, leading to a higher expression of Hd1 thus late flowering in LD and early flowering in SD. SDG711 was also found to be involved in the repression of Ehd1 in LD. SDG711 was shown to directly target to OsLF and Ehd1 loci to mediate H3K27me3 and gene repression. The function of the rice E(z) genes in LD repression and SD promotion of flowering suggests that PRC2-mediated epigenetic repression of gene expression is involved in the accurate photoperiod control of rice flowering.
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Claims 15
Claim · model-written summary
Overexpression of SDG711 repressed flowering in long day.
- Taxon
- rice
Oryza sativae1 - Treatment
- Over-expressione2
- Gene
- SDG711e2
- Outcome
- floweringe2
- Direction
- repressede2
- Setting
- LDe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“Over-expression and down-regulation of SDG711 respectively, repressed and promoted flowering in LD, but had no effect in SD”
Claim · model-written summary
Down-regulation of SDG711 promoted flowering in long day.
- Taxon
- riceOryza sativae1
- Treatment
- down-regulatione2
- Gene
- SDG711e2
- Outcome
- floweringe2
- Direction
- promotede2
- Setting
- LDe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“Over-expression and down-regulation of SDG711 respectively, repressed and promoted flowering in LD, but had no effect in SD”
Claim · model-written summary
Over-expression and down-regulation of SDG711 had no effect on flowering in short day.
- Taxon
- riceOryza sativae1
- Treatment
- Over-expression and down-regulation of SDG711e2
- Gene
- SDG711e2
- Outcome
- floweringe2
- Direction
- had no effecte2
- Setting
- SDe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“Over-expression and down-regulation of SDG711 respectively, repressed and promoted flowering in LD, but had no effect in SD”
Claim · model-written summary
Down-regulation of SDG718 delayed flowering in short day.
- Taxon
- riceOryza sativae1
- Treatment
- down-regulation of SDG718e2
- Gene
- SDG718e2
- Outcome
- floweringe2
- Direction
- delayede2
- Setting
- SDe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“By contrast, down-regulation of SDG718 had no effect in LD but delayed flowering in SD”
Claim · model-written summary
Down-regulation of SDG718 had no effect on flowering in long day.
- Taxon
- riceOryza sativae1
- Treatment
- down-regulation of SDG718e2
- Gene
- SDG718e2
- Outcome
- floweringe2
- Direction
- had no effecte2
- Setting
- LDe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“By contrast, down-regulation of SDG718 had no effect in LD but delayed flowering in SD”
Claim · model-written summary
Expression of SDG711 is induced by long day.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“The expression of SDG711 and SDG718 is induced by LD and SD, respectively”
Claim · model-written summary
Expression of SDG718 is induced by short day.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“The expression of SDG711 and SDG718 is induced by LD and SD, respectively”
Claim · model-written summary
SDG711 repressed OsLF in long day.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“SDG711 and SDG718 repressed OsLF (a repressor of Hd1) respectively in LD and SD, leading to a higher expression of Hd1 thus late flowering in LD and early flowering in SD”
Claim · model-written summary
SDG718 repressed OsLF in short day.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“SDG711 and SDG718 repressed OsLF (a repressor of Hd1) respectively in LD and SD, leading to a higher expression of Hd1 thus late flowering in LD and early flowering in SD”
Claim · model-written summary
Repression of OsLF led to a higher expression of Hd1.
- Taxon
- riceOryza sativae1
- Gene
- Hd1e2
- Outcome
- expression of Hd1e2
- Direction
- highere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“SDG711 and SDG718 repressed OsLF (a repressor of Hd1) respectively in LD and SD, leading to a higher expression of Hd1 thus late flowering in LD and early flowering in SD”
Claim · model-written summary
Late flowering occurred in long day.
- Taxon
- riceOryza sativae1
- Outcome
- late floweringe2
- Setting
- LDe2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“SDG711 and SDG718 repressed OsLF (a repressor of Hd1) respectively in LD and SD, leading to a higher expression of Hd1 thus late flowering in LD and early flowering in SD”
Claim · model-written summary
Early flowering occurred in short day.
- Taxon
- riceOryza sativae1
- Outcome
- early floweringe2
- Setting
- SDe2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“SDG711 and SDG718 repressed OsLF (a repressor of Hd1) respectively in LD and SD, leading to a higher expression of Hd1 thus late flowering in LD and early flowering in SD”
Claim · model-written summary
SDG711 is involved in repression of Ehd1 in long day.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“SDG711 was also found to be involved in the repression of Ehd1 in LD”
Claim · model-written summary
SDG711 targets OsLF and Ehd1 loci to mediate gene repression through H3K27me3.
- Taxon
- riceOryza sativae1
- Gene
- SDG711e2
- Outcome
- gene repressione2
- Qualifier
- H3K27me3e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“SDG711 was shown to directly target to OsLF and Ehd1 loci to mediate H3K27me3 and gene repression”
Claim · model-written summary
PRC2-mediated epigenetic repression of gene expression is involved in accurate photoperiod control of rice flowering.
- Taxon
- riceOryza sativae1
- Outcome
- accurate photoperiod control of rice floweringe2
- Qualifier
- PRC2-mediated epigenetic repression of gene expressione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Recent advances in rice flowering studies”
e2“The function of the rice E(z) genes in LD repression and SD promotion of flowering suggests that PRC2-mediated epigenetic repression of gene expression is involved in the accurate photoperiod control of rice flowering”
The same questions in other papers
loss of function · phenology · Oryza sativa (rice)Positive and negative results
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