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. .

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Epigenetic Regulation in the Control of Flowering

Anim Sci J 81, Multiple roles of Arabidopsis VRN1 aranidopsis vernalization and flowering time control. Together with transcriptional control, posttranslational regulation ensures that CO protein exists only in LD afternoons when FT is induced. Cell walls were stained by propidium iodide and visualized by the same excitation with a long-pass filter ELP.

KaplerMark A. Arabidopsis, the Rosetta stone of flowering time?

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Phytohormones and age, two internal cues, also induce flowering. Scale bars, 1 cm.

This suggests that there may be distinct mechanisms of chromatin regulation in the plant and animal kingdoms. 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.

B Top view of day-old tfl;ft-1 left and ft-1 right plants. Roswtta ED-rich region hatched linechromo domain box and chromo shadow domain solid line are indicated. Recent studies have revealed that genes encoding tme with homology to factors that function to regulate chromatin structure chromatin remodeling factors, polycomb proteins and so on participate in flowering pathways by repressing flower-promoting genes Blazquez et al.


Analysis of the molecular basis of flowering time variation in Arabidopsis accessions. The roots of transgenic Arabidopsis carrying TFL2: Shown is a representative result of two independent experiments. Samples were collected each day after sowing at dawn in LD conditions. GUS plants, indicating CO is expressed in vascular tissues.

The early-flowering phenotype of tfl2 was suppressed in the tfl;ft-1 double mutant Table 1suggesting that TFL2 functions upstream of FT in the flowering pathways.

Plant Cell 14 Suppl, S Since daytime CO protein expression occurs only when days are long, FT is induced in LD, resulting floeering earlier flowering [35,36,40] figure left. Skip to search form Skip to main content.

Of the flowering-associated genes contained on the GeneChip, only the expression of FT was increased in tfl2consistent with our previous findings. Floweirng J 27, Genetic architecture of flowering time differentiation between locally adapted populations of Arabidopsis thaliana. Dev Cell 17, We measured the time course of expression of these genes after sowing by real-time quantitative RT-PCR. Histone and chromatin cross-talk.

Arabidopsis, the Rosetta stone of flowering time? – Semantic Scholar

Regulation of FTthrough activation by CO and repression by TFL2would provide a good model with which to reveal these molecular mechanisms. Showing of 3 references. Close mobile search navigation Article navigation. The other question that should be addressed in future studies is how the ubiquitously expressed TFL2 gene can repress target genes in the inactivated phase and derepress in the activated phase of the plant.

These genes function downstream of floral pathway integrator genes and serve as references of the developmental stage and floral transition Bradley et al. Floral transition should be strictly regulated because it is one of the most critical developmental processes in plants.


These proteins are known to maintain genes in a silent state.

A thermosensory pathway controlling flowering time arabudopsis Arabidopsis thaliana. The expression of TFL2 in the root meristem, together with the observation that the root growth rate of tfl2 is lower than that of the wild type unpublished resultssuggests that TFL2 functions in the root although morphological lesion of the tfl2 root has not been well observed.

Curr Opin Plant Biol 4, We used the Col ecotype for genetic and gene expression analyses unless otherwise indicated. Reproduction Search for additional papers on this topic.

FEBS Lett Arabidopsis is an ideal system for the study of seasonal flowering mechanisms Many organisms use day length photoperiod information rosehta prepare for seasonal changes []. Invert Neurosci 3, Vince-Prue, Flwoering in Plants. Curr Opin Plant Biol 12, AukermanHajime Sakai The Plant cell In addition, studying the photoperiodic flowering mechanism is important for understanding a major plant reproduction mechanism, flowerig that is directly applicable to improvement in crop yields.

Plant J 46, From its sequence homology to HP1, its subnuclear localization and its ability to complement swi6 mutation, TFL2 may function as an HP1 that modifies chromatin structure to maintain genes in a silent state.