Temperature and gamma irradiation effects of scoparone, a citrus phytoalexin conferring resistance to Phytophthora citrophthora
Identifieur interne : 003B71 ( Main/Merge ); précédent : 003B70; suivant : 003B72Temperature and gamma irradiation effects of scoparone, a citrus phytoalexin conferring resistance to Phytophthora citrophthora
Auteurs : U. Afek [Israël] ; A. SztejnbergSource :
- Phytopathology [ 0031-949X ] ; 1993.
Descripteurs français
- Pascal (Inist)
- Résistance champignon, Accumulation biologique, Concentration chimique, Effet température, Irradiation gamma, Rutaceae, Phytophthora citrophthora, Ecorce, Citrus sinensis, Citrus aurantium, Citrus jambhiri, Poncirus trifoliata, Citrus macrophylla, Citrus paradisi, Origine végétale, Scoparone, Ecorce agrume, Citrus reticulata Citrus sinensis.
English descriptors
- KwdEn :
Abstract
The effects of gamma irradiation and temperature of incubation on accumulation of the phytoalexin scoparone were investigated in citrus inoculated with the fungus Phytophthora citrophthora. In all the tested citrus species, scoparone concentration in the branches was higher and lesion length was shorter when the incubation temperature after inoculation with P. citrophthora was 28 rather than 20 C. The temperature effect was pronounced, especially in inoculated branches of rough lemon, which after 4 days at 28 C had a scoparone concentration of 290 μg/g fresh weight, compared with 42 μg/g fresh weight at 20 C. The comparable lesion length in this species was 5.2 mm at 28 C compared with 11.0 mm at 20 C [...]
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Pascal:93-0586220Le document en format XML
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