title: Dormancy-specific imprinting underlies maternal inheritance of seed dormancy in Arabidopsis thaliana.
abstract: Mature seed dormancy is a vital plant trait that prevents germination out of season. InArabidopsis, the trait can be maternally regulated but the underlying mechanisms sustaining this regulation, its general occurrence and its biological significance among accessions are poorly understood. Upon seed imbibition, the endosperm is essential to repress the germination of dormant seeds. Investigation of genomic imprinting in the mature seed endosperm led us to identify a novel set of imprinted genes that are expressed upon seed imbibition. Remarkably, programs of imprinted gene expression are adapted according to the dormancy status of the seed. We provide direct evidence that imprinted genes play a role in regulating germination processes and that preferential maternal allelic expression can implement maternal inheritance of seed dormancy levels.
authors.affiliation: Department of Plant Biology, University of Geneva, Geneva, Switzerland.|Institute for Genetics and Genomics in Geneva (iGE3), University of Geneva, Geneva, Switzerland.
authors.forename: Urszula
authors.identifier: 0000-0002-9523-9123
authors.initials: U
authors.lastname: Piskurewicz
authors.affiliation: Department of Plant Biology, University of Geneva, Geneva, Switzerland.|Institute for Genetics and Genomics in Geneva (iGE3), University of Geneva, Geneva, Switzerland.
authors.forename: Mayumi
authors.initials: M
authors.lastname: Iwasaki
authors.affiliation: Kihara Institute for Biological Research, Yokohama City University, Yokohama, Japan.
authors.forename: Daichi
authors.initials: D
authors.lastname: Susaki
authors.affiliation: Department of Plant Biology, University of Geneva, Geneva, Switzerland.|Institute for Genetics and Genomics in Geneva (iGE3), University of Geneva, Geneva, Switzerland.
authors.forename: Christian
authors.initials: C
authors.lastname: Megies
authors.affiliation: Kihara Institute for Biological Research, Yokohama City University, Yokohama, Japan.
authors.forename: Tetsu
authors.initials: T
authors.lastname: Kinoshita
authors.affiliation: Department of Plant Biology, University of Geneva, Geneva, Switzerland.|Institute for Genetics and Genomics in Geneva (iGE3), University of Geneva, Geneva, Switzerland.
authors.forename: Luis
authors.identifier: 0000-0003-0463-1187
authors.initials: L
authors.lastname: Lopez-Molina
mesh_terms: D017360:Arabidopsis / Q000502:physiology*; D018392:Genomic Imprinting; D000072741:Maternal Inheritance; D057445:Plant Dormancy
keywords: A. thaliana; endosperm; genomic imprinting; germination; maternal inheritance of dormancy; parent-of-origin effect; plant biology