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The response of three aquatic plants to different concentration od selenite in media

Evelina Mohorko (2013) The response of three aquatic plants to different concentration od selenite in media. Diploma thesis.

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    Abstract

    The response of three aquatic plants (Myriophyllum spicatum, Ceratophyllum demersum and Potamogeton perfoliatus) to the change in selenite content in their environment was studied. All chosen aquatic plants were at first exposed to the medium with 10 mg/L of added selenite for various days of exposure (1 to 15 days). After the treatments the plants were transplanted to medium without added selenite for 5 days. After each treatment the photochemical efficiency of photosystem II (PS II), electron transport system activity (ETS), content of chlorophyll a, chlorophyll b, carotenoids and anthocyanin were measured. The chosen plants responded differently to various days of exposure in the medium with the added selenite; negative effects was noticed on the chosen plants after longer exposure to the medium with added selenite. P. perfoliatus proved to be the most sensitive since it started decaying already after 4 and 5 days of treatment in the selenite medium. All three plants recovered after being transplanted from selenite medium (shorter treatments) to the medium without added selenite. When transplanted to medium without added selenite the plants showed a higher photochemical efficiency then the plants exposed to selenite. After longer treatments in the medium with added selenite the electron transport system activity, content of chlorophyll a and chlorophyll b and content of anthocyanins mostly decreased in comparison to levels, measured during shorter treatments.

    Item Type: Thesis (Diploma thesis)
    Keywords: aquatic plants, effect of selenite, photochemical efficiency, ETS, pigments
    Number of Pages: 63
    Language of Content: Slovenian
    Mentor / Comentors:
    Mentor / ComentorsIDFunction
    doc. dr. Mateja GermMentor
    dr. Špela MechoraComentor
    Link to COBISS: http://www.cobiss.si/scripts/cobiss?command=search&base=50126&select=(ID=9753929)
    Institution: University of Ljubljana
    Department: Faculty of Education, Biotechnical Faculty, Faculty of Chemistry and Chemical Technology , Faculty od Natural Sciences and Engineering
    Item ID: 1728
    Date Deposited: 23 Sep 2013 11:47
    Last Modified: 23 Sep 2013 11:47
    URI: http://pefprints.pef.uni-lj.si/id/eprint/1728

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