Characterization, expression and function of DORMANCY ASSOCIATED MADS-BOX genes from leafy spurge
0301 basic medicine
0303 health sciences
DNA, Plant
Gene Expression Profiling
Photoperiod
Arabidopsis
MADS Domain Proteins
Genes, Plant
Cold Temperature
Alternative Splicing
03 medical and health sciences
Populus
Euphorbia
Gene Expression Regulation, Plant
Multigene Family
Cloning, Molecular
Promoter Regions, Genetic
Conserved Sequence
Plant Proteins
Transcription Factors
DOI:
10.1007/s11103-009-9596-5
Publication Date:
2010-01-12T02:53:48Z
AUTHORS (5)
ABSTRACT
DORMANCY ASSOCIATED MADS-BOX (DAM) genes are related to AGAMOUS-LIKE 24 and SHORT VEGETATIVE PHASE genes of arabidopsis and are differentially regulated coordinately with endodormancy induction and release in buds of several perennial plant species. DAM genes were first shown to directly impact endodormancy in peach where a deletion of a series of DAM resulted in loss of endodormancy induction. We have cloned and characterized several MADS box genes from the model perennial weed leafy spurge. Leafy spurge DAM genes are preferentially expressed in shoot tips and buds in response to cold temperatures and day length in a manner that is relative to the level of endodormancy induced by various environmental conditions. Over-expression of one DAM gene in arabidopsis delays flowering. Additionally, we show that at least one DAM gene is differentially regulated by chromatin remodeling. Comparisons of the DAM gene promoters between poplar and leafy spurge have identified several conserved sequences that may be important for their expression patterns in response to dormancy-inducing stimuli.
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