title: Changes in abscisic acid content and embryo sensitivity to (+)-abscisic acid during the termination of dormancy of yellow cedar seeds.
abstract: Yellow cedar seeds are dormant at maturity. The abscisic acid (ABA) content of the embryo (but not the megagametophyte) decreased approximately 2-fold following exposure of seeds to a dormancy-breaking treatment; this process was also accompanied by a 10-fold lowered sensitivity of the embryo to S:-(+)-ABA. A decline in ABA within the seed is not sufficient for dormancy breakage; reduced embryo sensitivity to ABA is also required.
authors.affiliation: Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
authors.forename: N
authors.initials: N
authors.lastname: Schmitz
authors.forename: S R
authors.initials: SR
authors.lastname: Abrams
authors.forename: A R
authors.initials: AR
authors.lastname: Kermode
mesh_terms: D000040:Abscisic Acid / Q000032:analysis / Q000502:physiology*; D018525:Germination / Q000502:physiology*; D012639:Seeds / Q000737:chemistry / Q000502:physiology*; D014197:Trees / Q000196:embryology / Q000502:physiology*
chemical_list: D000040:Abscisic Acid