title: Heracleum mantegazzianum growth phases and furocoumarin content.
abstract: The observation of photocontact dermatitis from Heracleum mantegazzianum Sommier et Levier in 2 gardeners at work prompted the analysis of furocoumarin content of stem, leaves and fruits of the plant during a period of 1 year. Their concentration was found to be maximal in fruit, intermediate in leaf, and minimal in stem. Psoralen was the most prevalent substance in the leaf and bergapten in the fruit. In the stem, in contrast, individual furocoumarins were found in lower but variable concentrations. 3 furocoumarin seasonal peaks were observed in the leaf: the maximal peak occurred in June, the intermediate in August, the minimal in November. This trend corresponds to 3 biological phases of the weed.
authors.affiliation: Dipartimento di Traumatologia, Ortopedia e Medicina del Lavoro, Università degli Studi, Torino, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Pira
authors.forename: C
authors.initials: C
authors.lastname: Romano
authors.forename: F
authors.initials: F
authors.lastname: Sulotto
authors.forename: I
authors.initials: I
authors.lastname: Pavan
authors.forename: E
authors.initials: E
authors.lastname: Monaco
mesh_terms: D000078223:5-Methoxypsoralen; D001901:Botany; D009783:Dermatitis, Occupational / Q000139:chemically induced; D005638:Fruit / Q000032:analysis; D011564:Furocoumarins / Q000032:analysis*; D006801:Humans; D007536:Isomerism; D008730:Methoxsalen / Q000032:analysis / Q000031:analogs & derivatives; D010787:Photosensitivity Disorders / Q000139:chemically induced; D063245:Plant Development; D010944:Plants / Q000032:analysis*; D012639:Seeds / Q000032:analysis
chemical_list: D011564:Furocoumarins; C015304:isopimpinellin; D000078223:5-Methoxypsoralen; C039409:pimpinellin; D008730:Methoxsalen