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. 2016 Feb 5;7:74. doi: 10.3389/fpls.2016.00074

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Copyright © 2016 De Caluwé, Xiao, Hermans, Verbruggen, Leloup and Gonze.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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CCA1/LHY and PRR5/TOC1 expression profiles in different photoperiods. (A,B) Simulated profiles of CCA1/LHY (A) and PRR5/TOC1 (B): one cycle in photoperiods ranging from 3 to 21 h in increments of 3 h, followed by release into continuous light at time 24. The colors go from red for a 3 h photoperiod to purple for a 21 h photoperiod. The time of the first peak in free-running conditions is almost independent of the entraining photoperiod. (C,D) Relationship between the entraining photoperiod and the phase of the first free-running peak.