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Sledování karanténního organismu Dothistroma septosporum na okrasných dřevinách v Arboretu Řícmanice
Petrovická, Kamila
The aim of the work is evaluation of the overall level infestation of coniferous trees in the arboretum, including identification of the pathogen sporulation, depending on climatic data, evaluation of the present state in the castle park Průhonice, control the occurrence of quarantine organism D. septosporum and his impact on the current composition of tree species. The following topic of Bachelor work observe red needle blight of pines spoluration (D. septosporum) in the Arboretum Řícmanice. Monitoring was carried out continually from the late May towards to the late November 2010. In the Arboretum Řícmanice this pathogen was confirmed on 31 individuals hosts. From the monitored species are the most strongly damaged Pinus aristata, Pinus nigra, Pinus mugo and Pinus heldreichii by the needle blight quarantine. In the opposite, incidence of the pathogen was not confirmed on scots pine (Pinus sylvestris) and larch (Larix spp.). It has been proved, that the needle blight quarantine of pines are the biggest threat for the youngest and recently planted coniferous trees approximately to the 20 years of age. This fact plays a large role for the replacement trees in the composition of the arboretum, which will be affected by the replacement of existing host species of D. septosporum for the resistant species to this pathogen, or deciduous amenity trees, whose number may increase at the expense of coniferous trees in the future. On the model area of castle park Průhonice, was not confirmed strong presence of D. septosporum. The pathogen is occured in the park but in a such small extent, that it cannot affect the original compositional scheme of the park. Besides the D. septosporum are in the park similar symptoms on the tree species caused by the other diseases of the assimilation apparatus Cyclaneusma spp. and Lophodermium spp..
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Botanical educational programs for the Bečovská Botanical Garden
ŠPAKOVÁ, Markéta
This thesis is dedicated to educational programs in Bečov Botanic Garden. The aim of this thesis was to extend the current offer to other botanical themes. Dendrological themes were selected for new educational programs. In total, three new educational programs were created. The first one is dealing with conifers, the second with cones of conifers and the third with broad-leaved species. All new programs include worksheets and methodological instruction for lectures and teachers. Tutorial tools (determination key, scale, educational box) were also created for the cone educational program.
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Použití přípravku Rhizopon při množení dřevin
Mikisková, Alexandra
The aim of the thesis is the influence of the stimulator Rhizopon on rooting of cuttings of selected coniferous and evergreen trees. For this trial was used conifers e.g. Chamaecyparis pisifera 'Filifera Aurea Nana', Juniperus squamata 'Blue Star', Picea abies 'Nidiformis', Picea glauca 'Conica', Taxus baccata 'Repandens', Taxus x media 'Hicksii', Thuja occidentalis 'Teddy'. As samples of evergreen trees was chosen a Buxus sempervirens 'Globosa' and Buxus sempervirens 'Winter Beauty'. Twenty variants of Rhizopon of various concentration and the active ingredient were used for the stimulation of cuttings. As a result of this experiment, it was found that the best rating of coniferous species were Chamaecyparis pisifera 'Filifera Aurea Nana' and Taxus x media 'Hicksii', rooting of these kinds of trees reached 90%. The best rooting of evergreen trees was a Buxus sempervirens 'Globosa', with 100% success of rooting. However, these results cannot be considered as a final result and it has to be repeated for a few seasons.
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Strukturální změny somatických embryí jehličnanů během jejich zrání a konverze v rostliny uplatnitelné v krajinářské tvorbě
Pinkasová, Markéta
Somatic embryogenesis is an attractive method of vegetative propagation of conifers. However, in many species of conifers are still problems in growing high quality cotyledonary somatic embryos. This is the reason for low quantity of viable plants. Somatic embryogenesis is an integrated process consisting of several consecutive steps. The right timing of individual steps and appropriate in vitro environment is very important to complete the whole process of somatic embryogenesis successfully. However, in many conifers is still necessary to examine the correct procedures and to create better conditions to achieve successfully grown plants. The aim of this thesis was to study the development of somatic embryos of conifers during the maturation and conversion into viable plants. We focused on the prevalence of abnormal cotyledonary somatic embryos created at the end stage of maturation and whether these somatic embryos have the potential to develop into viable plants. It was further found that if cotyledonary somatic embryos develop in the stage of maturation in a certain way, then it can not be changed the appearance or structure of the somatic embryos, thus encouraging the formation of meristem from which it began to develop a plant. Furthermore, in this work we tested the ability of embryogenic lines of Norway spruce (Picea abies) and silver fir (Abies alba) to start the process of maturation after 3 years of maintenance culture on proliferation medium.
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