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Plant invasions are becoming increasingly more discussed issue, primarily due to a negative impact on global biodiversity. It has also an economic impact and it affects human health. It is therefore important to study the introduction of plant species and their distribution, and monitor them in some way. This is particularly applied to protected areas, where rare species of plants are often endangered. In this work were described factors that affect distribution of alien plant species in the level of plant communities, landscape and large territories. For the practical part of the work has been selected the Křivoklátsko PLA as a model area, mainly because of detailed botanical mapping. There were analysed diversity, origin and distribution of alien plant species. Also the effect of selected factors on distribution of alien plant species in the Křivoklátsko PLA were assessed. The average altitude is the strongest factor. The second strongest factor is the fraction of anthropogenic habitats and moderate factor is the habitat diversity. The length of rivers is weak predictor and the length of roads is very weak predictor of number of alien plant species.

The task of this work was to evaluate the prospective use of fertilizers in containerproduction and their impact on ornamental trees. The experiment was established in April 2011 on the land department the Faculty of Horticulture in Lednice in one growing season. It was used five variants of substrates. For variant I was used peat-bark substrate (RKS II), which was regularly fertilizing with Kristalon fertilizer. For variant II was used substrate RS II with Osmocote. For the other three variants was used substrate RS II with low content (var. III), medium content (var. IV) and high content of organic fertilizers (var. V). Experimental plant was Philadelphus x hybr. 'Mont Blanc'. During the growing season was measured the plant height, at the end of the vegetation was measured strength of the root neck, root volume and number of stems. The variant II with Osmocote achieved the best results, the control variant I reached the second best results. The variants III, IV and V with organic fertilizers fell the worst, the variant III with low content of organic fertilizers fell the worst of all.

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The thesis "Care about flowery lawns, with emphasis on increasing the aesthetic quality" deals with the use of flowery lawns in garden and landscape design, focusing on the visual effect of the composition. Literary rewiev is devoted to the use of flower lawns from history to the present and evaluate their functions, features and aesthetic effect. Literary rewiev also contains a chapter, which is dealing with maintanance care of species rich vegetation. The main goal of this work is the theoretical part, which is based on phytocenology analysis that evaluate coverage, size and variability of individual plant communities in the Chateau garden in Kroměříž at regular intervals throughout the year. The results of the field survey are divided into four chapters, that includes estimation of species composition, their dynamics and aesthetic appeal. In conclusion, the results are made with tables and graphs.

The purple color of the caryopses in common wheat (Triticum aestivum L.) is an example of the countless diversity of the Mother Nature. Red and white caryopses are typical in common wheat. Genotypes with purple caryopses are also described. This coloring is caused by anthocyanins which deposit in the pericarp (purple). The anthocyanins biosynthetic pathway is well described. The key enzyme is chalcone synthase (CHS). It catalyzes the first step. We observed the deposition of anthocyanins in the pericarp, the expression of a chalcone synthase gene and the amount of the major anthocyanin - cyanidin-3-glycoside (pericarp of purple caryopses) and delphinidin 3 gycoside during caryopsis development. Purple pigment deposition was not homogeneous and/or uniform. At first, small isolated spots of purple color were formed and thereafter they expanded. The expression of chalcone synthase mRNA occurred five days before pigment deposition and finished earlier than expected. Amounts of cyanidin-3-glycoside increased continuously. Amounts of these fell at the end of caryopses development probably due to formation of more complex substances, process which is described as copigmentation.