A New Race, 704, of Plasmopara helianthi Pathogen of Sunflower Downy Mildew in Italy
نویسندگان
چکیده
منابع مشابه
RXLR and CRN Effectors from the Sunflower Downy Mildew Pathogen Plasmopara halstedii Induce Hypersensitive-Like Responses in Resistant Sunflower Lines
Plasmopara halstedii is an obligate biotrophic oomycete causing downy mildew disease on sunflower, Helianthus annuus, an economically important oil crop. Severe symptoms of the disease (e.g., plant dwarfism, leaf bleaching, sporulation and production of infertile flower) strongly impair seed yield. Pl resistance genes conferring resistance to specific P. halstedii pathotypes were located on sun...
متن کاملComponents of Quantitative Resistance to Downy Mildew (plasmopara Halstedii) in Sunflower (helianthus Annuus)
Components of quantitative resistance in sunflower (Helianthus annuus) to Plasmopara halstedii, the pathogen causing downy mildew, were investigated. Percentage infection, latent period, sporulation density and reduction of hypocotyl length were compared on two sunflower lines showing different levels of quantitative resistance in the field infected with different P. halstedii strains of races ...
متن کاملImpact of major gene resistance management for sunflower on fitness of Plasmopara halstedii \(downy mildew\) populations
1 Inra-UBP, UMR 1095, 234, avenue du Brézet, 63100 Clermont-Ferrand, France 2 Inra-CNRS, UMR 441, BP 52627, 31326 Castanet-Tolosan, France 3 Inra-UBP, UMR 1095, 24, avenue des Landais, 63177 Clermont-Ferrand, France 4 CETIOM, ENSAT, 18 Chemin de Borde-Rouge, BP 32607 31326 Auzeville-Tolosane France 5 Inra, UMR santé végétale (Inra-Enita), centre de recherches de Bordeaux, la Grande Ferrade, BP ...
متن کاملEffector Polymorphisms of the Sunflower Downy Mildew Pathogen Plasmopara halstedii and Their Use to Identify Pathotypes from Field Isolates
The obligate biotroph oomycete Plasmopara halstedii causes downy mildew on sunflower crop, Helianthus annuus. The breakdown of several Pl resistance genes used in sunflower hybrids over the last 25 years came along with the appearance of new Pl. halstedii isolates showing modified virulence profiles. In oomycetes, two classes of effector proteins, key players of pathogen virulence, are transloc...
متن کاملMolecular variability of sunflower downy mildew, Plasmopara halstedii, from different continents.
Downy mildew of sunflower (Helianthus annuus L.), caused by the pathogen Plasmopara halstedii, is a potentially devastating disease. Seventy-seven isolates of P. halstedii collected in twelve countries from four continents were investigated for RAPD polymorphism with 21 primers. The study led to a binary matrix, which was subjected to various complementary analyses. This is the first report on ...
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ژورنال
عنوان ژورنال: Plant Disease
سال: 2007
ISSN: 0191-2917,1943-7692
DOI: 10.1094/pdis-91-4-0463b