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Gewählte Master / Diploma Thesis:

Julia Kuch (2012): Untersuchungen zum Wirt-Pathogen System von Diplodia mutila - Ligustrum vulgare.
Master / Diploma Thesis - Abteilung Pflanzenbau, BOKU-Universität für Bodenkultur, pp 160. UB BOKU obvsg FullText

Data Source: ZID Abstracts
In this thesis, the host-pathogen system of Ligustrum vulgare and Diplodia mutila was investigated. This species of the Botryosphaeriaceae is a cosmopolitan and usually considered as a secondary parasite. In consequence of climate change, there is a change in the behavior of pests. Diplodia mutila has already been described in a number of host plants as a pathogen. In recent years, the evidence as aggressive pathogen to new host plants get more frequently. The pathogen has already not been described on Ligustrum vulgare and this thesis confirms a new host plant evidence. Light microscopic examinations and measurements of conidia were used for species identification. The length of the conidia of the isolate from Ligustrum vulgare corresponded to those of the other isolates, although the width was slightly lower. In a growth experiment, the optimum growth temperature of Diplodia mutila was determined at 25 ° C. In an infection experiment 5 woody species: Ligustrum vulgare, Atrovirens ', Crataegus monogyna, Thuja occidentalis ‚Smaragd‘ and Forsythia x suspensa were tested for their pathogenicity to the isolate of Ligustrum vulgare. On Crataegus and Forsythia were no symptoms formed. D. mutila was indetified als Pathogen on Ligustrum vulgare, Atrovirens', Prunus avium, and Thuja occidentalis, Smaragd'. On this species the pathogen was already reisolated. Necrosis on Ligustrum vulgare and Prunus avium were formed On Thuja occidentalis, there was a drought tops in more than 50% of the inoculated plants. The genetic characterization of the pathogen to other isolates of the gene bank was used for species identification and comparison with isolates from other hosts. In addition to the main group of D. mutila, which include the most isolates and the isolate from Ligustrum vulgare, four other groups were formed that suggest cryptic speciation and host specificity.


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