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):||24 January 2016|
|PDF File Size:||10.2 Mb|
|ePub File Size:||2.98 Mb|
|Price:||Free* [*Free Regsitration Required]|
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.
The ectopic expression of these genes may be related to the curled leaf phenotype of tlf2because constitutive expression of SEP3AG and both PI and AP3 is known to lead to a curled leaf morphology Stonf and MaKrizek and MeyerowitzHonma and Goto Related articles in Web of Science Google Scholar.
Cell walls were stained by propidium iodide and visualized by the same excitation with a long-pass filter ELP.
For example, FT is activated after the floral transition, and floral homeotic genes are upregulated in the floral organs. GUS gene was introduced into tfl plants, stonw resulted in complementation of the mutant phenotype in these transgenic plants.
In this model, light plays two crucial roles. Histone methyltransferase activity of a Drosophila Polycomb group repressor complex. TFL2 expression was detected continuously roseta the meristems throughout the vegetative, inflorescence and floral phases.
A proposed model for the flowering signaling pathway of sugarcane under photoperiodic control.
Arabidopsis, the Rosetta Stone of Flowering Time? – Dimensions
Research in the Dean laboratory www. J Biol Chem Five and four optical sections were projected, respectively.
Most flower promoting genes, which activate the flowering pathways, have been identified by examining late-flowering mutants. We mapped the insertion point of tfl arabidopzis to the TFL2 locus, near the simple sequence length polymorphism marker nga on chromosome 5 Larsson et al.
Both CO and FT orthologs exist in long-day and short-day plants. 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. The roots of transgenic Arabidopsis carrying TFL2: Oxford University Press is a department of the University of Oxford. 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.
The other is activating the timee key regulator that peaks in late afternoon. Interviews with Speakers – Video. Plant Cell 11, Phytohormones and age, two internal cues, also induce flowering.
These proteins are known to maintain genes in a silent state. 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. Article Category Epigenetic Regulation of Phenotypes.
Epigenetic Regulation in the Control of Flowering
Many plants flower at a specific time of year to optimize their reproductive success. One is entraining the phase of circadian clock oscillation. University of Washington, Department of Biology. Based on our findings as tike as others, a detailed model for day-length sensing mechanisms in Arabidopsis has been constituted see details below. The difference between LD and SD was more obvious when the plants were grown on plates; that is, while the increase was In my lab, we focus on studying the molecular mechanisms by which plants measure changes in photoperiods.
Arabidopsis, the Rosetta stone of flowering time?
FEBS Lett Flowering pathways in the model plant Arabidopsis. Vince-Prue, Photoperiodism in Plants.
Together with transcriptional control, posttranslational regulation ensures that CO protein exists only in LD afternoons when FT is induced. We report here that FT is upregulated in the tfl2 mutant, whereas CO and other floral pathway integrators are not affected.