ARABIDOPSIS THE ROSETTA STONE OF FLOWERING TIME PDF
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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The methylation of the AP3 and AG promoters is very low in the wild type, and we could not find a significant difference between the wild type and tfl2 unpublished results. In order to confirm that the early-flowering stoone of tfl2 is caused mainly by the ectopic expression of FTwe crossed tfl with ft-1 in the Col background ft-1 introgressed into Col; see Materials and Methods to make a tfl;ft-1 double mutant.
Curr Opin Plant Biol 6, At these stages and in these organs, TFL2 is actively transcribed but target genes are derepressed in response to the activators. Curr Opin Plant Biol 4, Studies in plants were instrumental in enabling researchers to propose and test conceptual models of day-length measurement.
Structure and function of fibronectin modules. Showing of extracted citations. Reproduction Search for additional papers on this topic. In order to investigate which gene in the photoperiod pathway is affected by TFL2 function, we compared the expression of COFT and SOC1 between the tfl2 mutant and the wild type background. In plants, mutants of chromatin factors show pleiotropic phenotypes, whereas in animals defects in these homologous genes are lethal Wagner A current mechanistic model for day-length measurement in Arabidopsis.
It flowers early under long-day LD conditions, while flowering is delayed in short days SD. Article Category Epigenetic Regulation of Phenotypes.
Epigenetic Regulation in the Control of Flowering
Flowerong late-flowering phenotype of gi was rescued by a tfl;gi double mutation data not shown. We used the aerial parts of seedlings without leaves leaves were cut off at petioles or rosette leaves.
These proteins are known to maintain genes in a silent state. In order to optimize reproduction, plants should flower at a preferable time. We isolated the arabiddopsis DNA of tfl It is plausible that not only the activator but also the repressor is required for the precise regulation of flowering, because this is the most crucial process of plant development. Phytohormones and age, two internal cues, also induce flowering.
We can deduce which pathway TFL2 is involved in from the genes that show altered expression in tfl2 mutants.
Arabidopsis, the Rosetta stone of flowering time?
The pleiotropic phenotype of the tfl2 mutant could reflect the fact that TFL2 represses the expression of multiple genes. The abundance of both CO and FT transcripts arabidopss the wild type is very low, which suggests that a small amount of their misexpression is sufficient for floral induction Putterill et al.
These results suggest that despite its structural homology to HP1, TFL2 mainly functions as a repressor of both specific euchromatin genes such as FT and several floral homeotic genes in Arabidopsis. Receive exclusive offers and updates from Oxford Academic.
Arabidopsis, the Rosetta stone of flowering time?
By contrast, early-flowering mutants are useful to find genes that function as repressors of flower-promoting genes. Research in the Dean laboratory www.
By microarray analysis, however, we did not detect an upregulation of heterochromatin genes in the tfl2 mutant. In contrast to the clear repression of these euchromatin genes, the expression of heterochromatin genes is not released from silencing in the tfl2 mutant. New Phytol A Genomic organization of the TFL2 gene in the 5. The GUS staining pattern in the shoot meristems reproduced the results of in situ experiments data not shown.
By clicking accept or continuing to use the site, you agree to the terms outlined in our Privacy PolicyTerms of Serviceand Dataset License. We constructed the g TFL2: Multiple pathways in the decision to flower: In my lab, we focus on studying the molecular mechanisms by which plants measure changes in photoperiods.
In parentheses, fold activations against Col are indicated. We carried out the microarray analysis using an Affymetrix GeneChip containing about Arabidopsis genes first version. Arabidopsis is a long-day Thee plant, therefore its flowering time is delayed in short-day SD conditions Table 1. Curr Biol 14, GI is a large nuclear protein without known functional domain [42], and FKF1 is a LOV domain containing a blue-light photoreceptor that regulates protein degradation [43,44].