Plant Physiol.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on May 14, 2008; 10.1104/pp.108.117622

OPEN ACCESS ARTICLE
This Article
Free via Open Access: OA
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow Supplemental Data
Right arrowOA All Versions of this Article:
147/3/1110    most recent
pp.108.117622v1
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 Web of Science
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 Web of Science (7)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Salome, P. A
Right arrow Articles by McClung, C. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Salome, P. A
Right arrow Articles by McClung, C. R.
Agricola
Right arrow Articles by Salome, P. A
Right arrow Articles by McClung, C. R.

Received February 25, 2008
Accepted May 11, 2008

Circadian timekeeping during early Arabidopsis development

Patrice A Salome , Qiguang Xie , and C. Robertson McClung *

Dartmouth College, Department of Biological Sciences, 6044 Gilman Laboratories, Hanover, NH 03755-3576, USA

* Corresponding author; email: mcclung{at}dartmouth.edu.

The circadian coordination of organismal biology with the local temporal environment has consequences for fitness that may become manifest early in development. We directly explored the development of the Arabidopsis clock in germinating seedlings by monitoring expression of clock genes. Clock function is detected within two days of imbibition (hydration of the dried seed). Imbibition is sufficient to synchronize individuals in a population in the absence of entraining cycles of light-dark or temperature, although light-dark and temperature cycles accelerate the appearance of rhythmicity and improve synchrony among individuals. Oscillations seen during the first two days following imbibition are dependent on the clock genes LHY, TOC1, ZTL, GI, PRR7 and PRR9, although later circadian oscillations develop in mutants defective in each of these genes. In contrast to circadian rhythmicity, which developed under all conditions, amplitude was the only circadian parameter that demonstrated a clear response to the light environment; clock amplitude is low in the dark and high in the light. A circadian clock entrainable by temperature cycles in germinating etiolated seedlings may synchronize the buried seedling with the local daily cycles before emergence from the soil and exposure to light.




This article has been cited by other articles:


Home page
 J Exp BotHome page
Compiled by, F. Tooke, T. Chiurugwi, and N. Battey
Flowering Newsletter bibliography for 2008
J. Exp. Bot., June 23, 2009; (2009) erp154v1.
[Full Text] [PDF]

Home page
 Proc. Natl. Acad. Sci. USAHome page
P. G. Stephenson, C. Fankhauser, and M. J. Terry
PIF3 is a repressor of chloroplast development
PNAS, May 5, 2009; 106(18): 7654 - 7659.
[Abstract] [Full Text] [PDF]

Home page
 Mol PlantHome page
W. Hu, Y.-S. Su, and J. C. Lagarias
A Light-Independent Allele of Phytochrome B Faithfully Recapitulates Photomorphogenic Transcriptional Networks
Mol Plant, January 1, 2009; 2(1): 166 - 182.
[Abstract] [Full Text] [PDF]


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