quantitative analysis of phytopathogenic ascomycota on leaves of pedunculate oaks (quercus robur l.) by real-time pcr.leaves of oak trees are often infected by various pathogenic fungi. as it is difficult to remove such organisms quantitatively from the leaf surface and as it is often impossible to grow these organisms independently from their host, there are almost no molecular data available from these oak leaf specific pathogens. for the quantitative removal of the microorganisms a procedure was developed combining a wax and microorganism freezing method with a dna extraction technique. for the development o ...200212007821
cross-kingdom interactions matter: fungal-mediated interactions structure an insect community on oak.ecology letters (2012) abstract: although phytophagous insects and plant pathogens frequently share the same host plant, interactions among such phylogenetically distant taxa have received limited attention. here, we place pathogens and insects in the context of a multitrophic-level community. focusing on the invasive powdery mildew erysiphe alphitoides and the insect community on oak (quercus robur), we demonstrate that mildew-insect interactions may be mediated by both the host plant and by na ...201222221681
erysiphe abbreviata on cherry bark oak--morphology, phylogeny and taxonomy.powdery mildew on cherry bark oak (quercus falcate var. pagodifolia) collected in tennessee, usa, was determined to be erysiphe abbreviata, a species confined to north america. the diagnostically important anamorph of this species is described for the first time. sequence analyses of the rdna its region and d1/d2 domains of the 28s rdna were used to obtain phylogenetic data for and taxonomic conclusions about this species. the structure of the anamorph (oidium subgen. pseudoidium) and the molecu ...200718268900
phylogeny and taxonomy of the oak powdery mildew erysiphe alphitoides sensu lato.phylogenetic analyses of erysiphe alphitoides s. lat. using sequences of the rdna its region and the d1/d2 domains of the 28s rdna revealed a complex consisting of several genetically and morphologically distinguished taxa, including the already described erysiphe alphitoides s. str. and e. hypophylla. the ascomata (chasmothecia) of e. hypophylla are morphologically very similar to those of e. alphitoides, but the two species are easily distinguishable by their symptoms, as well as the shape and ...200717681225
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