Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
The effect of selenium on physiological and biochemical characteristics of Lemna minor |
Sekundarni povzetek: |
Selenium is an element which can be toxic at certain concentrations. Selenium in wastewaters can contaminate surface water and groundwater, accumulate in certain aquatic plants and can lead to poisoning of aquatic and terrestrial organisms. We tried to establish which concentrations of selenite are beneficial for growth of common duckweed and how different selenite concentrations affect selected physiological and biochemical characteristics of common duckweed. We monitored respiratory potential, photochemical efficiency of photosystem II and the content of photosynthetic pigments (chlorophyll a and b) and carotenoids in plants treated with different concentrations of selenite. The results showed that the addition of selenite 0.5 mg/L had no effect on the selected physiological and biochemical characteristics of the studied plant. However, the addition of 1 mg/L had a positive effect on the growth of common duckweed. Our results showed that higher concentrations of selenite had negative effect on the studied plant. |
Sekundarne ključne besede: |
botany;botanika; |
Vrsta datoteke: |
application/pdf |
Vrsta dela (COBISS): |
Diplomsko delo |
Komentar na gradivo: |
Univ. Ljubljana, Pedagoška fak., Biotehnišak fak., Fak. za kemijo in kemijsko tehnologijo, Naravoslovnotehniška fak., Kemija in biologija |
Strani: |
X, 48 f., [4] f. pril. |
Vrsta dela (ePrints): |
thesis |
Naslov (ePrints): |
The effect of selenium on physiological and biochemical characteristics of Lemna minor |
Ključne besede (ePrints): |
Lemna minor |
Ključne besede (ePrints, sekundarni jezik): |
Lemna minor |
Povzetek (ePrints): |
Selen je element, ki je pri določenih koncentracijah lahko strupen. Z odpadnimi vodami selen prehaja v površinske vode in podtalnico, se nalaga v nekaterih vodnih rastlinah ter lahko povzroča zastrupitve vodnih in kopenskih organizmov. Zanimalo nas je, pri katerih koncentracijah selenita mala vodna leča najbolje uspeva in kako različne koncentracije selenita vplivajo na izbrane fiziološke in biokemijske lastnosti. Spremljali smo vrednosti dihalnega potenciala, fotokemično učinkovitost fotosistema II in vsebnosti fotosinteznih barvil (klorofila a in b) ter karotenoidov pri rastlinah, obravnavanih z različnimi koncentracijami selenita. Ugotovili smo, da dodatek selenita v koncentraciji 0,5 mg/L ne vpliva na izbrane fiziološke in biokemijske lastnosti preučevane rastline, medtem ko dodatek 1mg/L pozitivno vpliva na rast male vodne leče. Meritve so pokazale, da višje koncentracije selenita neugodno vplivajo na preučevano rastlino. |
Povzetek (ePrints, sekundarni jezik): |
Selenium is an element which can be toxic at certain concentrations. Selenium in wastewaters can contaminate surface water and groundwater, accumulate in certain aquatic plants and can lead to poisoning of aquatic and terrestrial organisms. We tried to establish which concentrations of selenite are beneficial for growth of common duckweed and how different selenite concentrations affect selected physiological and biochemical characteristics of common duckweed. We monitored respiratory potential, photochemical efficiency of photosystem II and the content of photosynthetic pigments (chlorophyll a and b) and carotenoids in plants treated with different concentrations of selenite. The results showed that the addition of selenite 0.5 mg/L had no effect on the selected physiological and biochemical characteristics of the studied plant. However, the addition of 1 mg/L had a positive effect on the growth of common duckweed. Our results showed that higher concentrations of selenite had negative effect on the studied plant. |
Ključne besede (ePrints, sekundarni jezik): |
Lemna minor |
ID: |
8311319 |