FIONA1 is essential for regulating period length in the Arabidopsis circadian clock
SCIE
SCOPUS
- Title
- FIONA1 is essential for regulating period length in the Arabidopsis circadian clock
- Authors
- Kim, J; Kim, Y; Yeom, M; Kim, JH; Nam, HG
- Date Issued
- 2008-02
- Publisher
- AMER SOC PLANT BIOLOGISTS
- Abstract
- In plants, the circadian clock controls daily physiological cycles as well as daylength-dependent developmental processes such as photoperiodic flowering and seedling growth. Here, we report that FIONA1 (FIO1) is a genetic regulator of period length in the Arabidopsis thaliana circadian clock. FIO1 was identified by screening for a mutation in daylength-dependent flowering. The mutation designated fio1-1 also affects daylength-dependent seedling growth. fio1-1 causes lengthening of the free-running circadian period of leaf movement and the transcription of various genes, including the central oscillators CIRCADIAN CLOCK-ASSOCIATED1, LATE ELONGATED HYPOCOTYL, TIMING OF CAB EXPRESSION1, and LUX ARRHYTHMO. However, period lengthening is not dependent upon environmental light or temperature conditions, which suggests that FIO1 is not a simple input component of the circadian system. Interestingly, fio1-1 exerts a clear effect on the period length of circadian rhythm but has little effect on its amplitude and robustness. FIO1 encodes a novel nuclear protein that is highly conserved throughout the kingdoms. We propose that FIO1 regulates period length in the Arabidopsis circadian clock in a close association with the central oscillator and that the circadian period can be controlled separately from amplitude and robustness.
- Keywords
- FLOWERING TIME; GENE-TRANSCRIPTION; MOLECULAR-BASIS; DISTINCT ROLES; RHYTHMS; THALIANA; PROTEIN; ENCODES; ENTRAINMENT; OSCILLATOR
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22728
- DOI
- 10.1105/TPC.107.0557
- ISSN
- 1040-4651
- Article Type
- Article
- Citation
- PLANT CELL, vol. 20, no. 2, page. 307 - 319, 2008-02
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