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Mechanisms of age-dependent response to winter temperature in perennial flowering of Arabis alpina.

ABSTRACT: Transcriptomic profile of Arabis alpina apex enriched material. We compared apices from plants grown for 2 weeks in long days (20M-BM-0C) (juvenile) with apices from plants grown for 8 weeks in long days (20M-BM-0C) (adult) and apices from plants grown for 2 weeks and then shifted in vernalization for 4 weeks with apices from plants grown for 8 weeks and than shifted to vernalization for 4 weeks. 2x2 factorial design. 2 starting ages (2 weeks and 8 weeks) and 2 developmental conditions (before and after vernalization). 4 biological replicates for each condition (16 arrays). Reference: pool of the 16 arrays.

ORGANISM(S): Arabis alpina

SUBMITTER: Emiel Ver Loren van Themaat 

PROVIDER: E-GEOD-40455 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Mechanisms of age-dependent response to winter temperature in perennial flowering of Arabis alpina.

Bergonzi Sara S   Albani Maria C MC   Ver Loren van Themaat Emiel E   Nordström Karl J V KJ   Wang Renhou R   Schneeberger Korbinian K   Moerland Perry D PD   Coupland George G  

Science (New York, N.Y.) 20130501 6136

Perennial plants live for more than 1 year and flower only after an extended vegetative phase. We used Arabis alpina, a perennial relative of annual Arabidopsis thaliana, to study how increasing age and exposure to winter cold (vernalization) coordinate to establish competence to flower. We show that the APETALA2 transcription factor, a target of microRNA miR172, prevents flowering before vernalization. Additionally, miR156 levels decline as A. alpina ages, causing increased production of SPL (S  ...[more]

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