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Invasion of Phytophthora alni in Europe
Pecka, Štěpán ; Černý, Karel (advisor) ; Kolařík, Miroslav (referee)
Species complex Phytophthora alni s. l. (Peronosporomycetes: Stramenopila) is a group of invasive pathogens of alder trees. It spreads mainly via water and causes root and collar rot often resulting in the death of attacked trees. Especially in riparian stands it often causes significant losses of alder and therefore remarcable changes of ecosystems and watercourses. The species complex is very polymorphic and divided into three species - P. ×alni, P. uniformis and P. ×multiformis. The most widespread in Europe and in the Czech Republic is the P. ×alni species. The aim of this thesis is to summarize information about P. alni complex (and especially of the most important taxon P. ×alni), to describe history of its spread and development of its area in Europe, genetic variability and inner structure of its populations, ecology and pathways of spread and, based of the known results, decribe the current situation of the invasion. Key words: Phytophthora alni, Peronosporomycetes, Alnus, pathogen, hybridization, area, riparian stands
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Invasion of Phytophthora alni in Europe
Pecka, Štěpán ; Černý, Karel (advisor) ; Kolařík, Miroslav (referee)
Species complex Phytophthora alni s. l. (Peronosporomycetes: Stramenopila) is a group of invasive pathogens of alder trees. It spreads mainly via water and causes root and collar rot often resulting in the death of attacked trees. Especially in riparian stands it often causes significant losses of alder and therefore remarcable changes of ecosystems and watercourses. The species complex is very polymorphic and divided into three species - P. ×alni, P. uniformis and P. ×multiformis. The most widespread in Europe and in the Czech Republic is the P. ×alni species. The aim of this thesis is to summarize information about P. alni complex (and especially of the most important taxon P. ×alni), to describe history of its spread and development of its area in Europe, genetic variability and inner structure of its populations, ecology and pathways of spread and, based of the known results, decribe the current situation of the invasion. Key words: Phytophthora alni, Peronosporomycetes, Alnus, pathogen, hybridization, area, riparian stands
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