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Reference Detail
| Reference | ||
|---|---|---|
| Author | Itoh H,Nonoue Y,Yano M,Izawa T | |
| Title | A pair of floral regulators sets critical day length for Hd3a florigen expression in rice. | |
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Abstract: The critical day length triggering photoperiodic flowering is set as an acute, accurate threshold in many short-day plants, including rice. Here, we show that, unlike the Arabidopsis florigen gene FT, the rice florigen gene Hd3a (Heading date 3a) is toggled by only a 30-min day-length reduction. Hd3a expression is induced by Ehd1 (Early heading date 1) expression when blue light coincides with the morning phase set by OsGIGANTEA(OsGI)-dependent circadian clocks. Ehd1 expression is repressed by both night breaks under short-day conditions and morning light signals under long-day conditions. Ghd7 (Grain number, plant height and heading date 7) was acutely induced when phytochrome signals coincided with a photosensitive phase set differently by distinct photoperiods and this induction repressed Ehd1 the next morning. Thus, two distinct gating mechanisms--of the floral promoter Ehd1 and the floral repressor Ghd7--could enable manipulation of slight differences in day length to control Hd3a transcription with a critical day-length threshold. |
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| Journal | Nat Genet | |
| Country | Japan | |
| Volume | 42(7) | |
| Pages | 635-8 | |
| Year | 2010 | |
| PubMed ID | 20543848 | |
| PubMed Central ID | - | |
| DOI | 10.1038/ng.606 | |
| URL | - | |
| Relation | ||
| Gene | GHD7 GI HD3A | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
|
Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
