Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana.

Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana. Abstract Text:

Yusuke Niwa,Shogo Ito,Norihito Nakamichi,Tsuyoshi Mizoguchi,Kanae Niinuma,Takafumi Yamashino,Takeshi Mizuno,

In Arabidopsis thaliana, the flowering time is regulated through the circadian clock that measures day-length and modulates the photoperiodic CO-FT output pathway in accordance with the external coincidence model. Nevertheless, the genetic linkages between the major clock-associated TOC1, CCA1 and LHY genes and the canonical CO-FT flowering pathway are less clear. By employing a set of mutants including an extremely early flowering toc1 cca1 lhy triple mutant, here we showed that CCA1 and LHY act redundantly as negative regulators of the photoperiodic flowering pathway. The partly redundant CCA1/LHY functions are largely, but not absolutely, dependent on the upstream TOC1 gene that serves as an activator. The results of examination with reference to the expression profiles of CO and FT in the mutants indicated that this clock circuitry is indeed linked to the CO-FT output pathway, if not exclusively. For this linkage, the phase control of certain flowering-associated genes, GI, CDF1 and FKF1, appears to be crucial. Furthermore, the genetic linkage between TOC1 and CCA1/LHY is compatible with the negative and positive feedback loop, which is currently believed to be a core of the circadian clock. The results of this study suggested that the circadian clock might open an exit for a photoperiodic output pathway during the daytime. In the context of the current clock model, these results will be discussed in connection with the previous finding that the same clock might open an exit for the early photomorphogenic output pathway during the night-time.

Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana. Publishing Authors By Initials

Y Niwa,S Ito,N Nakamichi,T Mizoguchi,K Niinuma,T Yamashino,T Mizuno,

For similar proteins: transcription factors research abstracts see: proteins: transcription factors research

PUBMED ID PMID:

MEDLINE DATE:

Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Plant & cell physiology

VOLUME: 48

Page Numbers: 925-37

Journal Abbreviation: Plant Cell Physiol.

ISSN: 0032-0781

DAY: 31

MONTH: 05

YEAR: 2007

Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9430925

Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana. Keywords Mesh Terms:

KEYWORDS: Transcription Factors

MESH TERMS: metabolism

Chemical & Substance for Abstract: Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana. Information

Substance Name: Transcription Factors

Registry Number: 0

Grant and Affiliation Information for Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana.

AFFILIATION: Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University, Chikusa-ku, Nagoya, 464-8601 Japan.

Country: Japan

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Plant Cell Physiol

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana Related Publications

• A novel function of plant histone H1: microtubule nucleation and continuous plus end association.
• Binding effect of the antitumor active dirhodium (II) compounds to plasmid DNA.
• Characterization of the bZip-type transcription factor NapA with reference to oxidative stress response in Aspergillus nidulans.
• Characterization of three putative sub-domains in the signal-input domain of the ArcB hybrid sensor in Escherichia coli(1).
• Clinicopathologic significance of EpCAM expression in squamous cell carcinoma of the tongue and its possibility as a potential target for tongue cancer gene therapy.
• Comparative study on the ribonucleases isolated from the debris and ribosome fraction of Escherichia coli.
• Crystal structure of Bacillus stearothermophilus alpha-amylase: possible factors determining the thermostability.
• Degradation of ribosomes in Escherichia coli cells treated with colicin E2.
• Effect of sRNA and related compounds on the phosphorolysis of polynucleotide phosphorylase in the degradation of messenger ribonucleic acids.
• Effects on health of dietary supplementation with 100 mg d-alpha-tocopheryl acetate, daily for 6 years.
• Factors related to potentially harmful behaviors towards disabled older people by family caregivers in Japan.
• Genetic linkages between circadian clock-associated components and phytochrome-dependent red light signal transduction in Arabidopsis thaliana.
• Genetic linkages of the circadian clock-associated genes, TOC1, CCA1 and LHY, in the photoperiodic control of flowering time in Arabidopsis thaliana.
• Identification of Amino Acid Substitutions that Render the Arabidopsis Cytokinin Receptor Histidine Kinase AHK4 Constitutively Active.
• Isolation and properties of an actinomycin sensitive mutant of Escherichia coli.
• Multiple actin-related proteins of Saccharomyces cerevisiae are present in the nucleus.
• Rhythmic and Light-Inducible Appearance of Clock-Associated Pseudo-Response Regulator Protein PRR9 Through Programmed Degradation in the Dark in Arabidopsis thaliana.
• Ribonuclease-cyclic phosphodiesterase system in Escherichia coli.
• Serial long-term evaluation of neointimal stent coverage and thrombus after sirolimus-eluting stent implantation by use of coronary angioscopy.
• Serial long-term evaluation of neointimal stent coverage and thrombus after sirolimus-eluting stent implantation by use of coronary angioscopy.
• Synchronization of plant circadian oscillators with a phase delay effect of the vein network.
• Synthesis and structural characterization of a gamma-Keggin-type dimeric silicotungstate with a bis(mu-hydroxo) dizirconium core [(gamma-SiW10O36)2Zr2(mu-OH)2]10-.
• The VA relationship after differential atrial overdrive pacing: a novel tool for the diagnosis of atrial tachycardia in the electrophysiologic laboratory.
• The degradation of ribosomal RNA in E. coli by mitomycin C and AF-5, preferential inhibitors of DNA synthesis.
• Thermoluminescence originating from the singlet excited state of 1,4-diarylcyclohexane-1,4-diyls: a potentially general strategy for the observation of short-lived biradicals.
• Total body irradiation followed by bone marrow transplantation: comparison of once-daily and twice-daily fractionation regimens.
• Where do we stand in the treatment of Parkinson's disease?
• [Analysis of polished surfaces of titanium castings.]
• [Diagnostic value of arthrography and MRI in rotator cuff tears]
• [Thoracoabdominal aortic aneurysm repair using a graft with prefabricated branches]