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Plant Signal Behav. 2014;9(2):e27994. Epub 2014 Feb 11.

Identification of gene functions associated to active and dormant buds in Arabidopsis.

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Departamento de Genética Molecular de Plantas; Centro Nacional de Biotecnología-CSIC; Campus Universidad Autónoma de Madrid; Madrid, Spain.


In Arabidopsis, axillary buds may become dormant in response to a far-red rich light or to increased apical dominance. BRANCHED1 (BRC1) is required for this response. Transcriptional profiling studies of wild-type and brc1 mutant buds allowed the identification of sets of BRC1-dependent genes including a group of ABA-related genes upregulated in dormant buds. By using BRC1 inducible lines we demonstrate that 2 of these ABA response factors, ABF3 and ABI5, are positively regulated in axillary buds by BRC1 after induction. To get further insight into the genetic control of the growth-to-dormancy transition in buds we have also compared this transcriptomic data with 2 additional "active vs dormant bud" transcriptomic data sets and found "core" co-regulated gene networks tightly associated to each condition.


ABA; Arabidopsis; BRANCHED1; axillary bud; bud dormancy; cell cycle; shade avoidance; shoot branching

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