Transcription profiling by array of Arabidopsis thaliana roots following the photoperiodic induction of flowering

The induction of flowering by the photoperiodic pathway (i.e. an increase in daylength) involves the production of systemic signals that induce the transition to reproductive development. In order to evaluate the early events occurring in the roots during the photoperiodic induction of flowering, we harvested the roots of 7 week-old Col-0 Arabidopsis thaliana plants grown plants exposed to a single 22-hour long day. Control plants were maintained under 8-hour short days. Plants were grown in hydroponics and roots tissues were harvested 16 and 22 hours after the beginning of the light period.

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