Epigenetic modifications during angiosperm gametogenesis

dc.contributor.authorMigicovsky, Zoë
dc.contributor.authorKovalchuk, Igor
dc.date.accessioned2016-10-31T22:55:57Z
dc.date.available2016-10-31T22:55:57Z
dc.date.issued2012
dc.descriptionSherpa Romeo green journal: open accessen_US
dc.description.abstractAngiosperms do not contain a distinct germline, but rather develop gametes from game-tophyte initials that undergo cell division.These gametes contain cells that give rise to an endosperm and the embryo. DNA methylation is decreased in the vegetative nucleus(VN) and central cell nuclei (CCN) resulting in expression of transposable elements (TEs). It is thought that the siRNAs produced in response to TE expression are able to travel to the sperm cells and egg cells (EC) from VN and CCN, respectively, in order to enforce silencing there. Demethylation during gametogenesis helps ensure that even newly integrated TEs are expressed and therefore silenced by the resulting siRNA production. A final form of epi-genetic control is modification of histones, which includes accumulation of the H3 variant HTR10 in mature sperm that is then completely replaced following fertilization.In females, the histone isoforms present in the EC and CCN differ, potentially helping to differentiate the two components during gametogenesis.en_US
dc.description.peer-reviewYesen_US
dc.identifier.citationMigicovsky, Z., & Kovalchuk, I. (2012). Epigenetic modifications during angiosperm gametogenesis. Frontiers in Plant Science, 3(20). doi:10.3389/fpls.2012.00020en_US
dc.identifier.urihttps://hdl.handle.net/10133/4642
dc.language.isoen_CAen_US
dc.publisherFrontiers Mediaen_US
dc.publisher.departmentDepartment of Biological Sciencesen_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.subjectEpigenetic modificationsen_US
dc.subjectGenomic imprintingen_US
dc.subjectTransposon reactivationen_US
dc.subjectPlant gametogenesisen_US
dc.subjectDNA methylationen_US
dc.subjectHistone modificationsen_US
dc.titleEpigenetic modifications during angiosperm gametogenesisen_US
dc.typeArticleen_US
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