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Seasonal control of flowering in annual and perennial plants

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We are comparing the mechanisms by which the life cycles of annual and perennial plants are synchronised to the changing seasons. Arabidopsis thaliana is a model annual plant and we have shown how circadian-clock regulation of transcription of specific regulatory genes and photoreceptor signaling combine to promote flowering of this species in response to long summer days. As a perennial species, we have used Arabis alpina, which diverged from Arabidopsis around 30 million years ago. We have studied the effects of vernalization (exposure to low winter temperatures) on the life cycle of Arabis alpina and propose that genes involved in vernalization of Arabidopsis are differently regulated in A. alpina to confer perennial-specific traits. Evolution of the regulation of these genes involves changes in chromatin regulation. The talk will expand on these comparative approaches to study flowering-time control.

http://www.mpiz-koeln.mpg.de/english/research/couplandGroup/coupland/

This talk is part of the Plant Sciences Departmental Seminars series.

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