Plant Cell BIOBASE Corporation
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Cell Advance Online Publication
Published on February 15, 2008; 10.1105/tpc.107.055715

This Article
Right arrow Full Text - TPC Advance Online Pub. (PDF)
Right arrow Supplemental Data
Right arrow All Versions of this Article:
20/2/307    most recent
tpc.107.055715v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Kim, J.
Right arrow Articles by Nam, H. G.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Kim, J.
Right arrow Articles by Nam, H. G.
Agricola
Right arrow Articles by Kim, J.
Right arrow Articles by Nam, H. G.

Received September 19, 2007
Returned for revision December 7, 2007
Accepted January 30, 2008

FIONA1 Is Essential for Regulating Period Length in the Arabidopsis Circadian Clock

Jeongsik Kim 1, Yumi Kim 1, Miji Yeom 1, Jin-Hee Kim 1, and Hong Gil Nam 2*

1 Division of Molecular and Life Sciences, Pohang University of Science and Technology, Hyoja-dong, Pohang, Gyungbuk 790-784, Republic of Korea
2 Division of Molecular and Life Sciences, Pohang University of Science and Technology, Hyoja-dong, Pohang, Gyungbuk 790-784, Republic of Korea; School of Interdisciplinary Biosciences and Bioengineering, Pohang University of Science and Technology, Hyoja-dong, Pohang, Gyungbuk 790-784, Republic of Korea

* To whom correspondence should be addressed. E-mail: nam{at}postech.ac.kr.

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.




This article has been cited by other articles:


Home page
 Plant Physiol.Home page
J.-F. Wu, Y. Wang, and S.-H. Wu
Two New Clock Proteins, LWD1 and LWD2, Regulate Arabidopsis Photoperiodic Flowering
Plant Physiology, October 1, 2008; 148(2): 948 - 959.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
J. Mach
Newly Isolated Circadian Clock Components Conserved across Eukaryotes
PLANT CELL, May 1, 2008; 20(5): 1187 - 1187.
[Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications THE PLANT CELL PLANT PHYSIOLOGY
Copyright © 2008 by the American Society of Plant Biologists