Redei, G.P. () Supervital mutants of Arabidopsis. Genetics, 47 Simpson, G.G. &Dean, C. () Arabidopsis, the Rosetta stone of flowering time?Science . casein protein kinase 2 alphasubunit genes. Theor Appl Genet — Simpson GG, Dean C () Arabidopsis, the Rosetta Stone of flowering time. [CrossRef] [PubMed] Simpson, G.G.; Dean, C. Arabidopsis, the Rosetta stone of flowering time? Science , , – [CrossRef] [PubMed] Valentin, F.L. .
|Published (Last):||9 July 2007|
|PDF File Size:||12.55 Mb|
|ePub File Size:||5.46 Mb|
|Price:||Free* [*Free Regsitration Required]|
Search for related content. Effective vectors for transformation, expression of heterologous genes, and assaying transposon excision in transgenic plants.
Molecular genetic studies using Arabidopsis have revealed that four major floral-promoting pathways — the photoperiod, vernalization, autonomous and gibberellin pathways — work in response to environmental and internal cues Simpson et al. Topics Discussed in This Arabidopsid. The methods for in situ hybridization Takada et al. Both CO and FT orthologs exist in long-day and short-day plants. A current mechanistic model for day-length measurement in Arabidopsis. It is consistent with rosettta day-length insensitive early flowering phenotype of FT overexpressing plants Kardailsky et al.
In addition, we found that gTFL2: Vince-Prue, Photoperiodism in Plants. Oda for technical advice, and to N. Curr Opin Plant Biol 4, Polycomb, epigenomes, and control of cell identity. GUS was expressed in the rosettx leaves, the root apical meristem and pericycle, and the emerging lateral roots Fig.
Plant Cell 20, Five and four optical sections were projected, respectively. Simpson stonr, Caroline Dean Published in Science Multiple environmental and endogenous inputs regulate when plants flower. The day-length-insensitive early-flowering phenotype of tfl2 is due to ectopic expression of FT at an early developmental stage. Showing of 3 references.
However, this upregulation was not observed at other time points or in the RT-PCR experiments, and the increase in FT was much greater than this. CrossRef Medline Google Scholar.
Epigenetic Regulation in the Control of Flowering
Arabidopsis is a long-day LD plant, therefore its flowering time is delayed in short-day SD conditions Table 1. GI is a large nuclear protein without known functional domain , and FKF1 is a LOV domain containing a blue-light photoreceptor that regulates protein degradation [43,44].
TFL2 consists of six exons and encodes a protein of amino acids with a chromo domain and a chromo shadow domain Fig.
Citations Publications citing this paper. One is entraining the phase of circadian clock oscillation. Six exons are shown as a box and the mutation sites of tfl and tfl are indicated.
Arabidopsis, the Rosetta stone of flowering time?
Compared with LD conditions, the numbers of rosette leaves at flowering in SD conditions increased by more than 40 leaves in wild-type plants, but by only about 5—6 leaves in rlsetta mutants. Ectopic expression of FT induces early flowering irrespective of environmental cues and the expression of FT is very low in wild-type plants, even in the inductive phase Kardailsky et al.
Cell walls were stained by propidium rosettta and visualized by the same excitation with a long-pass filter ELP. Invert Neurosci 3, Trends Plant Sci 11, In order to identify such target genes, we compared the genome-wide gene expression profile of tfl2 and wild type. Genetic architecture of flowering time differentiation between locally adapted populations of Arabidopsis thaliana.
The CO gene, which encodes a Zn-finger transcription factor, is assumed to function directly upstream of FT Putterill et al.
Taken together, these results suggest that, in the flowering pathway, TFL2 represses only the expression of FT and has very little effect on other flowering-associated genes. Studies in plants were instrumental in enabling researchers to propose and test conceptual models of day-length measurement.
Caroline Dean – Google Scholar Citations
We first focused on the early-flowering phenotype of tfl2which is relatively rosetfa to day length, because this phenotype suggests that TFL2 gene may function to repress target gene s involved in the photoperiod pathway. In the developing leaves, gTFL2: Curr Opin Plant Biol 6, Multiple pathways in the decision to flower: A proposed model for the flowering signaling pathway of sugarcane under photoperiodic control. These observations show that even a small misexpression of FT is sufficient for floral induction, and thus FT must be strictly maintained in a silent state during the non-inductive phase.
Curr Biol 17, The need for winter in the switch to flowering. The abundance of both CO and FT transcripts in the wild type is very low, which suggests that a small amount of their misexpression is sufficient for floral induction Putterill et al. For introgression into the Col ecotype, we crossed ft-1 originally in Ler with Col six times, and its rosetta progeny that showed an ft phenotype was obtained. Curr Opin Plant Biol 12, Flowering pathways in the model plant Arabidopsis.