Dormancy-associated MADS genes from the EVG locus of peach [Prunus persica (L.) Batsch] have distinct seasonal and photoperiodic expression patterns

Mapping and sequencing of the non-dormant evg mutant in peach [Prunus persica (L.) Batsch] identified six tandem-arrayed DAM (dormancy-associated MADS-box) genes as candidates for regulating growth cessation and terminal bud formation. To narrow the list of candidate genes, an attempt was made to as...

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Bibliographic Details
Published in:Journal of experimental botany 2009-08, Vol.60 (12), p.3521-3530
Main Authors: Li, Zhigang, Reighard, Gregory Lynn, Abbott, Albert Glenn, Bielenberg, Douglas Gary
Format: Article
Language:English
Subjects:
Annual
Biological and medical sciences
bud
chilling
Cooling
Dormancy
Fundamental and applied biological sciences. Psychology
Gene Expression Regulation, Plant - radiation effects
Genes
Genetic loci
Genomics
Germination and dormancy
Light
perennial
Photoperiod
Plant physiology and development
Plant Proteins - genetics
Plant Proteins - metabolism
Plants
Prunus
Prunus - genetics
Prunus - growth & development
Prunus - physiology
Prunus - radiation effects
Prunus persica
Research Papers
RNA
Seasons
Tissue samples
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Summary:Mapping and sequencing of the non-dormant evg mutant in peach [Prunus persica (L.) Batsch] identified six tandem-arrayed DAM (dormancy-associated MADS-box) genes as candidates for regulating growth cessation and terminal bud formation. To narrow the list of candidate genes, an attempt was made to associate bud phenology with the seasonal and environmental patterns of expression of the candidates in wild-type trees. The expression of the six peach DAM genes at the EVG locus of peach was characterized throughout an annual growing cycle in the field, and under controlled conditions in response to a long day-short day photoperiod transition. DAM1, 2, 4, 5, and 6 were responsive to a reduction in photoperiod in controlled conditions and the direction of response correlated with the seasonal timing of expression in field-grown trees. DAM3 did not respond to photoperiod and may be regulated by chilling temperatures. The DAM genes in peach appear to have at least four distinct patterns of expression. DAM1, 2, and 4 are temporally associated with seasonal elongation cessation and bud formation and are the most likely candidates for control of the evg phenotype.
ISSN:0022-0957
1460-2431
DOI:10.1093/jxb/erp195