Mobile FT mRNA contributes to the systemic florigen signalling in floral induction
Open Access
- 24 August 2011
- journal article
- research article
- Published by Springer Nature in Scientific Reports
- Vol. 1 (1), 73
- https://doi.org/10.1038/srep00073
Abstract
In inducing photoperiodic conditions, plants produce a signal dubbed “florigen” in leaves. Florigen moves through the phloem to the shoot apical meristem (SAM) where it induces flowering. In Arabidopsis, the FLOWERING LOCUS T (FT) protein acts as a component of this phloem-mobile signal. However whether the transportable FT mRNA also contributes to systemic florigen signalling remains to be elucidated. Using non-conventional approaches that exploit virus-induced RNA silencing and meristem exclusion of virus infection, we demonstrated that the Arabidopsis FT mRNA, independent of the FT protein, can move into the SAM. Viral ectopic expression of a non-translatable FT mRNA promoted earlier flowering in the short-day (SD) Nicotiana tabacum Maryland Mammoth tobacco in SD. These data suggest a possible role for FT mRNA in systemic floral signalling, and also demonstrate that cis-transportation of cellular mRNA into SAM and meristem exclusion of pathogenic RNAs are two mechanistically distinct processes.Keywords
This publication has 39 references indexed in Scilit:
- CmRBP50 Protein Phosphorylation Is Essential for Assembly of a Stable Phloem-mobile High-affinity Ribonucleoprotein ComplexPublished by Elsevier ,2011
- Just say no: floral repressors help Arabidopsis bide the timeCurrent Opinion in Plant Biology, 2009
- A cis Element within Flowering Locus T mRNA Determines Its Mobility and Facilitates Trafficking of Heterologous Viral RNAJournal of Virology, 2009
- A Polypyrimidine Tract Binding Protein, Pumpkin RBP50, Forms the Basis of a Phloem-Mobile Ribonucleoprotein ComplexPlant Cell, 2009
- Identification of Arabidopsis thaliana phloem RNAs provides a search criterion for phloem‐based transcripts hidden in complex datasets of microarray experimentsThe Plant Journal, 2008
- Tobacco Rattle Virus 16-Kilodalton Protein Encodes a Suppressor of RNA Silencing That Allows Transient Viral Entry in MeristemsJournal of Virology, 2008
- FLOWERING LOCUS T Protein May Act as the Long-Distance Florigenic Signal in the CucurbitsPlant Cell, 2007
- The tomato FT ortholog triggers systemic signals that regulate growth and flowering and substitute for diverse environmental stimuliProceedings of the National Academy of Sciences, 2006
- RDR6 Has a Broad-Spectrum but Temperature-Dependent Antiviral Defense Role in Nicotiana benthamianaJournal of Virology, 2005
- Shoot meristem tissue of tobacco inoculated with Cucumber mosaic virus is infected with the virus and subsequently recovers from infection by RNA silencingJournal of General Plant Pathology, 2004