期刊
PLANT SIGNALING & BEHAVIOR
卷 9, 期 2, 页码 -出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.27994
关键词
axillary bud; bud dormancy; shoot branching; ABA; cell cycle; BRANCHED1; Arabidopsis; shade avoidance
资金
- Ministerio de Educacion y Ciencia [BIO2008-00581, CSD2007-00057]
- Ministerio de Ciencia y Tecnologia [BIO2011-25687]
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.
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