نتایج جستجو برای: pythium spp
تعداد نتایج: 52277 فیلتر نتایج به سال:
The genus Phytopythium (Peronosporales) has been described, but a complete circumscription has not yet been presented. In the present paper we provide molecular-based evidence that members of Pythium clade K as described by Lévesque & de Cock (2004) belong to Phytopythium. Maximum likelihood and Bayesian phylogenetic analysis of the nuclear ribosomal DNA (LSU and SSU) and mitochondrial DNA cyto...
DNA from 14 Pythium species, Verrucalvus flavofaciens and Zoophagus insidians was characterized by CsCl-bisbenzimide density gradients in order to investigate its taxonomic potential. A few incomplete analyses were made for other species. All clearly assignable Pythium species produced three DNA bands in the gradient. Pythium undulatum along with Verrucalvus and Zoophagus produced only two band...
One of the major field constraints to seed production in safflower has proven tobe soil born pathogens, Phytophthora drechsleri and Pythium ultimum. In order toevaluate the efficiency of a field-laboratory selection method to improve resistanceof safflower against soil born pathogens, Ph. drechsleri and P. ultimum, a two-yearinvestigation was conducted. The results showed that selection is an e...
گونه های پی تیوم بین سال های 1388-1386 در استان همدان مورد مطالعه قرار گرفت. نمونه ها از مناطق مختلف استان (همدان، تویسرکان، سرکان، نهاوند، قهاوند، ملایر، اسدآباد، رزن و جورقان) جمع آوری شد. براساس ویژگی های ریخت شناسی جنسی و غیرجنسی، گونه ها شناسایی شدند. در این تحقیق بیش از150 جدایه پی تیوم مورد بررسی قرار گرفت که 12 گونه pythium aphanidermatum, p. deliense, p. hydnosporum, p. irregulare, p. ...
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