Ekologie poloparazitického druhu \kur{Odontites vernus} a možnosti experimentálního studia poloparazitů-pilotní studie

Pavla TOMŠOVÁ

Bachelor's thesis

Ecology of hemiparasitic plant \kur{Odontites vernus} and possibilities of experimental study of hemiparasitic plants-a pilot study

Abstract:

Hemiparasitic plants posse many interesting physiological and ecological traits and are of great ecological importance in many natural ecosystems. The aim of this study was (1) to review pot experiments investigating host {--} hemiparasite interaction in pot experiments, (2) find suitable conditions for germination of Odontites vernus seeds, and (3) using database data and own phytosociological relevés determine types of plant communities where hemiparasite Odontites vernus grows. Many pot experiments were carried out to investigate host {--} hemiparasite interactions. They demonstrated that hemiparasitic plants gain water and mineral nutrients from their host; although they are capable of photosynthesis, many are also able to get organic carbon from their hosts. Most of the experiments demonstrated some selectivity for an individual hosts. The amount of water and solutes taken by hemiparasite from its host differed among hosts and hemiparasite species. Experimetns reveal competition for light between hemiparasite and its hosts. My own experiments show that three to nine weeks chilling is a suitable treatment to overcome seed dormancy in Odontites vernus. Detrended Correspondence Analysis revealed three plant community types where Odontites vernus growth {--} trampled grasslands, weed communities and nutrient poor grasslands.

Language used: Czech

Date on which the thesis was submitted / produced: 30. 4. 2010

Accessible from:: 30. 4. 2010

Identifier: 9709

Thesis defence

• Supervisor: prof. RNDr. Jan Lepš, CSc.

University of South Bohemia in České Budějovice

Faculty of Science

Bachelor programme / field:
Biology / Biology