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The Origin and Function of Heterostyly in Angiosperms
Nainar, Adam ; Münzbergová, Zuzana (advisor) ; Slovák, Marek (referee)
This bachelor's theses focuses on the phenomenon of heterostyly, which is an extraordinary feature of several representatives of plants from Angiosperm group like primroses /Primula/, based on two or three simultaneously occuring forms of one species, and expresses itself by opposite height configuration of anthers and stigmas, and that supports a reciprocal pollination and decreases a risk of self-pollination. The introduction in the beginning of the theses compares heterostyly with another various adaptations, which Angiosperms use them to avoid self-pollination. Further, the theses is divided to topical chapters, such as occurence and types of heterostyly (distyly, tristyly), and there are also many mentions about history of research of this phenomenon and about possibilities, according to which the heterostyly could have been evolved. In the theses there are mentioned other supplementary features, such as pollen grain differences as well. Also, this theses dedicates to interactions between heterostylous plants and pollinators and even to a brief genetic basis of heterostyly, which is a very important topic for explaining all these features. In the conclusion, there is mentioned a project named "The chase for cowslips", which is mapping populations of primroses - cowslips /Primula veris/ in...
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The Tolerance of Selected Species Fish Eggs to the Antifungal Baths
RAŠKA, Karel
The antifungal detergents Jodisol and Aquahum were tested on the fish eggs of the common carp (Cyprinus carpio), the sheatfish (Silurus glanis), the tench (Tinca tinca) and the common barbel (Barbus barbus). On the fish eggs of the African sharptooth catfish (Clarias gariepinus) the detergents Aquahum and Primrose were tested. The fish eggs from artificial spawn were used for the experiments. These experiments were running under laboratory conditions. The bath length was 5 minutes. The fish eggs incubation proceeded on laboratory dish at average water temperature, which was for the carp 22.87 ? 1.38 (min. 20.5; max. 23.8) °C, for the sheatfish 24.03 ? 2.12 (min. 20.4; max. 25.5) °C, for the tench 20.40 ? 2.13 (min. 18.0; max. 22.5) °C, for the common barbel 16.8 ? 0.95 (min. 14.5; max. 18) °C, and for the African sharptooth catfish 22.50 ? 0.35 (min. 22.0; max. 23.0) °C. Using Jodisol the best hatching success for the common carp was achieved when the concentration was 1 ? 10 ml?l-1, for the sheatfish 1 ml?l-1, for the tench 20 ml?l-1, and for the common barbel 50 ml?l-1. Using Aquahum the best hatching success for the common carp was achieved when the concentration was 1 ml?l-1, for the sheatfish 0.1 ml?l-1, for the tench 2 ml?l-1, and for the common barbel 0.1 and 2 ml?l-1. The stable preparation Aquahum with concentration 0.05 ml?l-1 proved the best results for the sheatfish. The preparation Primrose used for the African sharptooth catfish proved the best results with concentration 0.0033 and 0.01 ml?l-1. The detergent Aquahum could be recommended for the baths of the common barbel and the common carp. Jodisol worked well for the tench and the sheatfish. The best detergent for the African sharptooth catfish was Primrose.
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