Journal
MOLECULAR PLANT
Volume 2, Issue 4, Pages 610-627Publisher
CELL PRESS
DOI: 10.1093/mp/ssp027
Keywords
Epigenetics; chromatin; Polycomb group proteins; LEAFY COTYLEDON; developmental identity; Arabidopsis; seed development
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The developmental program of seeds is promoted by master regulators that are expressed in a seed-specific manner. Ectopic expression studies reveal that expression of these master regulators and other transcriptional regulators is sufficient to promote seed-associated traits, including generation of somatic embryos. Recent work highlights the importance of chromatin-associated factors in restricting expression of seed-specific genes, in particular PcG proteins and ATP-dependent remodelers. This review summarizes what is known regarding factors that promote zygotic and/or somatic embryogenesis and the chromatin machinery that represses their expression. Characterization of the regulation of seed-specific genes reveals that plant chromatin-based repression systems exhibit broad conservation with and surprising differences from animal repression systems.
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