Vpliv selena na fiziološke in biokemijske lastnosti male vodne leče

Povzetek

Ključne besede

Podatki

Jezik:	Slovenski jezik
Leto izida:	2013
Izvor:	Ljubljana
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL PEF - Pedagoška fakulteta
Založnik:	[T. Okoren]
UDK:	581.5:546.23(043.2)
COBISS:	9601353
Št. ogledov:	1429
Št. prenosov:	279
Ocena:	0 (0 glasov)
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Ostali podatki

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