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Author Tamaki S., Tsuji H., Matsumoto A., Fujita A., Shimatani Z., Terada R., Sakamoto T., Kurata T., Shimamoto K.
Title FT-like proteins induce transposon silencing in the shoot apex during floral induction in rice.
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.
Journal Proc. Natl. Acad. Sci. U.S.A.
Country unknown
Volume 112(8)
Pages E901-10
Year 2015
PubMed ID 25675495
PubMed Central ID 4345627
DOI 10.1073/pnas.1417623112
URL -
Relation
Gene BZIP77 GF14B HD3A RAP1A RFT1
INSD -
Strain Wild Core Collection -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
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Stages in Each Organ
- Muant Lines (Gene)
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Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
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