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Plos Biology : Repression of Flowering by the Mir172 Target Smz, Volume 7

By Dean, Caroline

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Book Id: WPLBN0003930858
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos Biology : Repression of Flowering by the Mir172 Target Smz, Volume 7  
Author: Dean, Caroline
Volume: Volume 7
Language: English
Subject: Journals, Science, Biology
Collections: Periodicals: Journal and Magazine Collection, PLoS Biology
Publication Date:
Publisher: Plos


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Dean, C. (n.d.). Plos Biology : Repression of Flowering by the Mir172 Target Smz, Volume 7. Retrieved from

Description : A small mobile protein, encoded by the FLOWERING LOCUS T (FT) locus, plays a central role in the control of flowering. FT is regulated positively by CONSTANS (CO), the output of the photoperiod pathway, and negatively by FLC, which integrates the effects of prolonged cold exposure. Here, we reveal the mechanisms of regulation by the microRNA miR172 target SCHLAFMU¨TZE (SMZ), a potent repressor of flowering. Whole-genome mapping of SMZ binding sites demonstrates not only direct regulation of FT, but also of many other flowering time regulators acting both upstream and downstream of FT, indicating an important role of miR172 and its targets in fine tuning the flowering response. A role for the miR172/SMZ module as a rheostat in flowering time is further supported by SMZ binding to several other genes encoding miR172 targets. Finally, we show that the action of SMZ is completely dependent on another floral repressor, FLM, providing the first direct connection between two important classes of flowering time regulators, AP2- and MADS-domain proteins.


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