[Potential role of winter rape weeds in the extension of broomrape in Poitou-Charentes].
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.
Gibot-Leclerc
Stéphanie
S
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
Brault
Marianne
M
Pinochet
Xavier
X
Sallé
Georges
G
D029688:Brassica napus / Q000502:physiology*; D005602:France; D031672:Orobanche / Q000502:physiology*; D012621:Seasons