Constitutive expression of CIR1 (RVE2) affects several circadian-regulated processes and seed germination in Arabidopsis.

Constitutive expression of CIR1 (RVE2) affects several circadian-regulated processes and seed germination in Arabidopsis. Research Abstract Details 

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Constitutive expression of CIR1 (RVE2) affects several circadian-regulated processes and seed germination in Arabidopsis. Abstract Text:

Xiangbo Zhang,Yanhui Chen,Zhi-Yong Wang,Zhangliang Chen,Hongya Gu,Li-Jia Qu,

Circadian clocks are endogenous auto-regulatory mechanisms that allow organisms, from bacteria to humans, to advantageously time a wide range of activities within 24 h environmental cycles. Here we report the identification and characterization of an MYB-related gene, designated Circadian 1 (CIR1), that is involved in circadian regulation in Arabidopsis. Expression of CIR1 is transiently induced by light and oscillates with a circadian rhythm. The rhythmic expression of CIR1 is controlled by the central oscillator. Constitutive expression of CIR1 resulted in a shorter period length for the rhythms of four central oscillator components, and much lower amplitude for the rhythms of central oscillator components CCA1 and LHY. Furthermore, CIR1 over-expression severely affected the circadian rhythms of its own RNA and those of the slave oscillator EPR1 and effector genes Lhcb and CAT3. Plants that constitutively expressed CIR1 displayed delayed flowering, longer hypocotyls and reduced seed germination in the dark. These results suggest that CIR1 is possibly part of a regulatory feedback loop that controls a subset of the circadian outputs and modulates the central oscillator.

Constitutive expression of CIR1 (RVE2) affects several circadian-regulated processes and seed germination in Arabidopsis. Publishing Authors By Initials

X Zhang,Y Chen,ZY Wang,Z Chen,H Gu,LJ Qu,

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

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Constitutive expression of CIR1 (RVE2) affects several circadian-regulated processes and seed germination in Arabidopsis. Journal Published:

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

Journal: The Plant journal : for cell and molecular biology

VOLUME: 51

Page Numbers: 512-25

Journal Abbreviation: Plant J.

ISSN: 0960-7412

DAY: 21

MONTH: 06

YEAR: 2007

Constitutive expression of CIR1 (RVE2) affects several circadian-regulated processes and seed germination in Arabidopsis. Information

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LANGUAGE: eng

NlmUniqueID: 9207397

Constitutive expression of CIR1 (RVE2) affects several circadian-regulated processes and seed germination in Arabidopsis. Keywords Mesh Terms:

KEYWORDS: Transcription Factors

MESH TERMS: physiology

Chemical & Substance for Abstract: Constitutive expression of CIR1 (RVE2) affects several circadian-regulated processes and seed germination in Arabidopsis. Information

Substance Name: Catalase

Registry Number: EC 1.11.1.6

Grant and Affiliation Information for Constitutive expression of CIR1 (RVE2) affects several circadian-regulated processes and seed germination in Arabidopsis.

AFFILIATION: National Laboratory for Protein Engineering and Plant Genetic Engineering, Peking-Yale Joint Research Center for Plant Molecular Genetics and AgroBiotechnology, College of Life Sciences, Peking University, Beijing 100871, China.

Country: England

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MEDLINETA: Plant J

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