Home > Search Results: Mezník, Daniel Heliodor
Search:
 
Search Tips :: Simple Search
Search collections:
Sort by: Display results: Output format:
National Repository of Grey Literature 2 records found  Search took 0.02 seconds. 
Allometric diversity and plasticity of cellular morphologies of desmids (Desmidiales, Zygnematophyceae)
 Mezník, Daniel Heliodor ; Neustupa, Jiří (advisor) ; Kleisner, Karel (referee)
If the proportions of two features of an organism change during its growth, their relationships can be described as allometry. The first partof this thesis quantifies the allometric relationship of semicellular perimeter and area of 11 species of unicellular microalgae from the genus Euastrum. These algae are recognized for their fractalmorphology, which is theorized to be an adaptation for increasing their surface area which is used to absorb nutrients.Thequestion was whether larger individuals within a population have a more complex shape and therefore a longer perimeter. I examined microphotographs of tens of semicells obtained from preserved wild populations. All included species exhibited a marked increase in shape complexity. The same trend could be noticed on and interspecific level. I compared these results to existing studies conducted on the related Micrasterias lineage. The second part of this thesis deals with allometric changes during semicells ontogeny in both Euastrum and Micrasterias. I analyzed growing clonal cultures using geometric morphometry. Specifically, I observed the relative position of 11 structurally homologous landmarks on semicells of different ages. This has been the first experiment of its kind on these model organisms. Idescribed theontogenetic change in landmark...
Detailed record
Allometric scaling of cellular morphologies in evolution and ecology of unicellular algae
 Mezník, Daniel Heliodor ; Neustupa, Jiří (advisor) ; Woodard, Kateřina (referee)
Allometry is a type of relationship between two changing traits of an organism's body. One of the most studied types is morphological allometry, which deals with the change of shape in relation to the size of an organism. The surface area to volume ratio is an immensely important feature that impacts many aspects of a cell's life, and there are ways of changing it. Unicellular algae are a diverse group with many specifics and a wide-ranging impact on the global ecosystem. The goal of this thesis is to introduce allometry and its types and applications with an emphasis on morphologic allometry and changes to the surface area to volume ratio, using specifically unicellular algae as model organisms.
Detailed record

Interested in being notified about new results for this query?
Subscribe to the RSS feed.
Digital Repository :: Search :: Submit :: Personalize :: Help
Powered by Invenio v1.1.2
Maintained by admin.invenio@techlib.cz
This site is also available in the following languages:
Česky  English