Vpliv selena na fiziološke in biokemijske lastnosti male vodne leče

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Language:	Slovenian
Year of publishing:	2013
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL PEF - Faculty of Education
Publisher:	[T. Okoren]
UDC:	581.5:546.23(043.2)
COBISS:	9601353
Views:	1429
Downloads:	279
Average score:	0 (0 votes)
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Secondary language:	English
Secondary title:	The effect of selenium on physiological and biochemical characteristics of Lemna minor
Secondary abstract:	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.
Secondary keywords:	botany;botanika;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. Ljubljana, Pedagoška fak., Biotehnišak fak., Fak. za kemijo in kemijsko tehnologijo, Naravoslovnotehniška fak., Kemija in biologija
Pages:	X, 48 f., [4] f. pril.
Type (ePrints):	thesis
Title (ePrints):	The effect of selenium on physiological and biochemical characteristics of Lemna minor
Keywords (ePrints):	Lemna minor
Keywords (ePrints, secondary language):	Lemna minor
Abstract (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.
Abstract (ePrints, secondary language):	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.
Keywords (ePrints, secondary language):	Lemna minor
ID:	8311319