title: Sunflower sesquiterpene lactone models induce Orobanche cumana seed germination.
abstract: Six sunflower sesquiterpene lactone models which share structural features of the lactone rings of strigol and its synthetic analogues, the GR family, with different conformational flexibilities were tested as Orobanche cumana germination stimulants. Among them, parthenolide and 3,5-dihydroxydehydrocostus-lactone significantly increased O. cumana germination, presenting higher activity than GR-24, used as a standard in the germination bioassay. The effect of these two compounds is species-specific, showing no germination stimulant activity on other Orobanche spp. tested (O. crenata, O. ramosa and O. aegyptiaca). Data presented are discussed in terms of a structure-activity relationship.
authors.affiliation: Departamento de Bioquímica y Biologiá Molecular, ETSIAM, Universidad de Córdoba, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Pérez de Luque
authors.forename: J C
authors.initials: JC
authors.lastname: Galindo
authors.forename: F A
authors.initials: FA
authors.lastname: Macías
authors.forename: J
authors.initials: J
authors.lastname: Jorrín
mesh_terms: D001681:Biological Assay; D018525:Germination / Q000502:physiology*; D006368:Helianthus / Q000737:chemistry*; D007783:Lactones / Q000737:chemistry / Q000378:metabolism*; D019684:Magnoliopsida / Q000502:physiology*; D012639:Seeds / Q000502:physiology; D012717:Sesquiterpenes / Q000737:chemistry / Q000378:metabolism*; D013045:Species Specificity; D013329:Structure-Activity Relationship
chemical_list: D007783:Lactones; D012717:Sesquiterpenes