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| 著者 | Tamaki S., Tsuji H., Matsumoto A., Fujita A., Shimatani Z., Terada R., Sakamoto T., Kurata T., Shimamoto K. | |
| タイトル | FT-like proteins induce transposon silencing in the shoot apex during floral induction in rice. | |
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Abstract: Floral induction is a crucial developmental step in higher plants. Florigen, a mobile floral activator that is synthesized in the leaf and transported to the shoot apex, was recently identified as a protein encoded by FLOWERING LOCUS T (FT) and its orthologs; the rice florigen is Heading date 3a (Hd3a) protein. The 14-3-3 proteins mediate the interaction of Hd3a with the transcription factor OsFD1 to form a ternary structure called the florigen activation complex on the promoter of OsMADS15, a rice APETALA1 ortholog. However, crucial information, including the spatiotemporal overlap among FT-like proteins and the components of florigen activation complex and downstream genes, remains unclear. Here, we confirm that Hd3a coexists, in the same regions of the rice shoot apex, with the other components of the florigen activation complex and its transcriptional targets. Unexpectedly, however, RNA-sequencing analysis of shoot apex from wild-type and RNA-interference plants depleted of florigen activity revealed that 4,379 transposable elements (TEs; 58% of all classifiable rice TEs) were expressed collectively in the vegetative and reproductive shoot apex. Furthermore, in the reproductive shoot apex, 214 TEs were silenced by florigen. Our results suggest a link between floral induction and regulation of TEs. |
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| 掲載誌 | Proc. Natl. Acad. Sci. U.S.A. | |
| Country | unknown | |
| 刊数 | 112(8) | |
| ページ | E901-10 | |
| 発刊年 | 2015 | |
| PubMed ID | 25675495 | |
| PubMed Central ID | 4345627 | |
| DOI | 10.1073/pnas.1417623112 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | BZIP77 GF14B HD3A RAP1A RFT1 | |
| INSD | - | |
| 系統 |
野生イネ コアコレクション |
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| 突然変異系統(遺伝研 Collection) | - | |
| 種子不稔系統 | - | |
| 致死変異体系統 | - | |
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組織別発生段階 - 突然変異系統(遺伝子) |
- | |
| 栽培イネ品種(遺伝研 Collection) | - | |
| 組織別発生段階 | - | |
