In this study, ITS–rDNA region was used to identify some anamorphic powdery mildews in Guilan province. According to the results, Erysiphe species on Vicia faba and Sesbania punicea showed 100% similarity to each other, however, without ITS sequence of holotype of E. sesbaniae it is impossible to make conclusion whether Vicia faba powdery mildew fungus actually belongs to E. sesbaniae or E. tri...

The biology and genetics of developmentally regulated resistance to rusts and powdery mildews is being examined through a study of wheat mutants that express enhanced resistance to one or more of these pathogens. Mutants, isolated from the wheat varieties Hobbit ‘sib’ and Guardian, are being mapped to determine the number, location, and effect of each mutation contributing to each pathogen resi...

The powdery mildew diseases, caused by fungal species of the Erysiphales, have an important economic impact on a variety of plant species and have driven basic and applied research efforts in the field of phytopathology for many years. Although the first taxonomic reports on the Erysiphales date back to the 1850's, advances into the molecular biology of these fungal species have been hampered b...

Powdery mildews are a group of economically and ecologically important plant pathogens. In the past 25 years use ribosomal DNA (rDNA) in powdery has led to major taxonomic revisions. However, broad scale rDNA also revealed multiple species complexes that cannot be differentiated based on ITS + LSU data alone. Currently, there only two mildew studies took multi-locus approach resolve complex. pr...

ABSTRACT A number of phenotypic and genotypic characteristics were used to ascertain the identity and diversity of Pseudozyma flocculosa, a natural antagonist of powdery mildews that has received little attention in terms of taxonomy. To this end, several putative isolates of P. flocculosa as well as several closely related species were analyzed. Ribosomal DNA sequences distinguished P. floccul...

Biotrophic eukaryotic plant pathogens require a living host for their growth and form an intimate haustorial interface with parasitized cells. Evolution to biotrophy occurred independently in fungal rusts and powdery mildews, and in oomycete white rusts and downy mildews. Biotroph evolution and molecular mechanisms of biotrophy are poorly understood. It has been proposed, but not shown, that ob...