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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Influence of metabolites of entomopathogenic bacteria genus \kur{Xenorhabdus} on the survival and reproduction of facultative entomoparasitic and phytophagous nematodes
 JAKUBÍKOVÁ, Hedvika
Bacteria of the genus Xenorhabdus live as the natural symbionts of the entomopathogenic nematodes of the family Steinernematidae. They produce a wide range of toxic secondary metabolites of different chemical structure and effect. The synthesis of particular products is specific for each strain of Xenorhabdus. The thesis is focused on evaluating the impact of bacterial metabolites on facultatively entomoparasitic nematodes Oscheius myriophila, the free-living nematode Caenorhabditis elegans and the phytophagous potato cyst nematode Globodera rostochiensis. Target species of nematodes were exposed to 37 strains of Xenorhabdus bacteria, isolated from various species of Steinernematidae. Testing the impact of bacterial metabolites on O. myriophila and C. elegans nematodes was performed both by direct cultivation of target species on solid medium with live bacterial cultures as well as in sterilized liquid bacteria cultures. The effect of toxic substances on G. rostochiensis was evaluated only in selected sterilized bacteria cultures.
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Nekrofágie u entomopatogenních hlístic
 ČÁPOVÁ, Diana
The aim of the present study was to study the occurrence of scavenging behavior among different species and strains of entomopathogenic nematodes. Another part of the study was focused on scavenging of the selected entomopathogenic nematodes in insects killed by various non-native strains of Xenorhabdus bovinenii. Further aim was to investigate the interspecific competition of the selected entomopathogenic nematodes with the nematode Oscheius myriophila for dead hosts. The final aim was the search for possible toxicity of the selected X. bovienii strains against nematode Oscheius myriophila.
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