Photoperiod sensors allow physiological adaptation to the changing seasons. The prevalent hypothesis is that day length perception is mediated through coupling of an endogenous rhythm with an external light signal. Sufficient molecular data are available to test this quantitatively in plants, though not yet in mammals. In Arabidopsis, the clock-regulated genes CONSTANS (CO) and FLAVIN, KELCH, F-BOX (FKF1) and their light-sensitive proteins are thought to form an external coincidence sensor. Here, we model the integration of light and timing information by CO, its target gene FLOWERING LOCUS T (FT), and the circadian clock. Among other predictions, our models show that FKF1 activates FT. We demonstrate experimentally that this effect is independent of the known activation of CO by FKF1, thus we locate a major, novel controller of photoperiodism. External coincidence is part of a complex photoperiod sensor: modeling makes this complexity explicit and may thus contribute to crop improvement.
%0 Journal Article
%1 Salazar2009Prediction
%A Salazar, José D.
%A Saithong, Treenut
%A Brown, Paul E.
%A Foreman, Julia
%A Locke, James C. W.
%A Halliday, Karen J.
%A Carré, Isabelle A.
%A Rand, David A.
%A Millar, Andrew J.
%D 2009
%I Cell Press
%J Cell
%K circadian-oscillators models
%N 6
%P 1170--1179
%T Prediction of Photoperiodic Regulators from Quantitative Gene Circuit Models
%U http://www.cell.com//abstract/S0092-8674(09)01487-1
%V 139
%X Photoperiod sensors allow physiological adaptation to the changing seasons. The prevalent hypothesis is that day length perception is mediated through coupling of an endogenous rhythm with an external light signal. Sufficient molecular data are available to test this quantitatively in plants, though not yet in mammals. In Arabidopsis, the clock-regulated genes CONSTANS (CO) and FLAVIN, KELCH, F-BOX (FKF1) and their light-sensitive proteins are thought to form an external coincidence sensor. Here, we model the integration of light and timing information by CO, its target gene FLOWERING LOCUS T (FT), and the circadian clock. Among other predictions, our models show that FKF1 activates FT. We demonstrate experimentally that this effect is independent of the known activation of CO by FKF1, thus we locate a major, novel controller of photoperiodism. External coincidence is part of a complex photoperiod sensor: modeling makes this complexity explicit and may thus contribute to crop improvement.
@article{Salazar2009Prediction,
abstract = {Photoperiod sensors allow physiological adaptation to the changing seasons. The prevalent hypothesis is that day length perception is mediated through coupling of an endogenous rhythm with an external light signal. Sufficient molecular data are available to test this quantitatively in plants, though not yet in mammals. In Arabidopsis, the clock-regulated genes {CONSTANS} ({CO}) and {FLAVIN}, {KELCH}, {F-BOX} ({FKF1}) and their light-sensitive proteins are thought to form an external coincidence sensor. Here, we model the integration of light and timing information by {CO}, its target gene {FLOWERING} {LOCUS} T ({FT}), and the circadian clock. Among other predictions, our models show that {FKF1} activates {FT}. We demonstrate experimentally that this effect is independent of the known activation of {CO} by {FKF1}, thus we locate a major, novel controller of photoperiodism. External coincidence is part of a complex photoperiod sensor: modeling makes this complexity explicit and may thus contribute to crop improvement.},
added-at = {2018-12-02T16:09:07.000+0100},
author = {Salazar, Jos\'{e} D. and Saithong, Treenut and Brown, Paul E. and Foreman, Julia and Locke, James C. W. and Halliday, Karen J. and Carr\'{e}, Isabelle A. and Rand, David A. and Millar, Andrew J.},
biburl = {https://www.bibsonomy.org/bibtex/219f8a8c9bbfdd8d8674265f7c0c84f48/karthikraman},
citeulike-article-id = {8062970},
citeulike-linkout-0 = {http://www.cell.com//abstract/S0092-8674(09)01487-1},
day = 11,
interhash = {d3c399ee98bdc49e52e057ec0ef0c98e},
intrahash = {19f8a8c9bbfdd8d8674265f7c0c84f48},
journal = {Cell},
keywords = {circadian-oscillators models},
month = dec,
number = 6,
pages = {1170--1179},
posted-at = {2010-10-21 11:34:59},
priority = {2},
publisher = {Cell Press},
timestamp = {2018-12-02T16:09:07.000+0100},
title = {Prediction of Photoperiodic Regulators from Quantitative Gene Circuit Models},
url = {http://www.cell.com//abstract/S0092-8674(09)01487-1},
volume = 139,
year = 2009
}