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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Arabidopsisthe Rosetta stone of flowering time? The differential expression of these genes was confirmed by real time quantitative RT-PCR Table 2and their upregulation in leaves was also observed data not shown.
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.
A fime strain carrying an swi6- mutation Allshire et arabidopsiz.
Arabidopsis, the Rosetta stone of flowering time? – Semantic Scholar
Plant J 46, TFL2 represents such a protein, and these findings suggest that early-flowering mutants provide a good tool with which to identify repressors that are important in the flowering pathway. A thermosensory pathway controlling flowering time in Arabidopsis thaliana. The relatively day-length insensitive early-flowering phenotype of tfl2 is mainly due to the overexpression of FT during the non-inductive developmental stages. One is entraining the phase of circadian clock oscillation.
Shown is a representative result of two independent experiments. GFP green signals are observed in only the nuclei and the localization pattern is very similar in both transgenic plants.
The late-flowering phenotype of gi was rescued by a tfl;gi double mutation data not shown. Curr Opin Plant Biol 12, Oda for technical advice, and to Tome. The pleiotropic phenotypes of tfl2 mutants suggest that TFL2 function is required for the regulation of multiple genes, and indeed arabivopsis found that several floral homeotic genes are upregulated in the tfl2 mutant.
Curr Opin Plant Biol 13, Citations Publications citing this paper. Homeotic changes of flower, however, are not observed in tfl2 mutants. 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.
Epigenetic Regulation in the Control of Flowering
Curr Opin Plant Biol 15, We carried out the microarray analysis using an Affymetrix GeneChip containing about Arabidopsis genes first version. The unprogrammed expression of these genes must be therefore strictly repressed; however, a candidate repressor has not been identified as yet.
A repressor of flowering in Arabidopsis regulated by vernalization and methylation. This drastic difference in developmental patterns enables us to assess the effects of genetic modification on the photoperiodic response more precisely.
At these stages and in these organs, TFL2 is actively transcribed but target genes are derepressed in response to the activators. To accurately measure differences in day length, circadian clock-dependent timing regulation of CO is a crucial mechanism [35,36]. RNA in situ hybridization experiments showed that TFL2 transcripts accumulated in proliferating cells in the meristematic tissues of vegetative, inflorescence, and floral organs Fig.
In the developing leaves, gTFL2: Services Alert me when this article is cited Alert me if a correction is posted Similar articles in this series Similar articles in Web of Science Similar articles in PubMed Download to citation manager. The other is activating the clock-controlled key regulator that peaks in late afternoon.
Crosses with tfl obtained from the Arabidopsis Biological Resource Center showed that tfl is allelic to tfl Larsson et al. For example, FT is activated after the floral transition, and floral homeotic genes are upregulated in the floral organs. Cell walls were stained by propidium iodide and visualized by the same excitation with a long-pass filter ELP.
Arabidopsis, the Rosetta Stone of Flowering Time? – Dimensions
Curr Biol 14, A day-old plant Eroot apical meristem F and emerging lateral roots G are shown. Photoperiodic response was first described in plants in timme early twentieth century . However, we made a double mutant with gigantea gianother late-flowering mutant that is involved in the photoperiod pathway and is epistatic to co Koornneef et al.