title: [Potential role of winter rape weeds in the extension of broomrape in Poitou-Charentes].
abstract: In the Poitou-Charentes district, among the 82 species of winter rape weeds identified, 22 displayed a strong affinity for this crop (Brassica napus L.). In fields, 50% of these weeds were parasitized by Orobanche ramosa, playing the role of host plants. Greenhouse co-cultures (weed/Orobanche ramosa) showed that weeds non-parasitized in fields could be attacked by broomrape, developing a more or less complete cycle. In vitro co-cultures (weed/Orobanche ramosa) revealed that root exudates of non-parasitized weeds, in fields or in greenhouse co-cultures, could induce Orobanche ramosa seed germination, but not attachment. These weeds could play the role of false hosts.
authors.affiliation: Laboratoire de parasitologie végétale, université Pierre-et-Marie-Curie, tour 53, case courrier 155, 4, place Jussieu, 75252 Paris, France. gibotl@moka.ccr.jussieu.fr
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Gibot-Leclerc
authors.forename: Marianne
authors.initials: M
authors.lastname: Brault
authors.forename: Xavier
authors.initials: X
authors.lastname: Pinochet
authors.forename: Georges
authors.initials: G
authors.lastname: Sallé
mesh_terms: D029688:Brassica napus / Q000502:physiology*; D005602:France; D031672:Orobanche / Q000502:physiology*; D012621:Seasons