Vsebnost živega srebra in arbuskularna mikoriza pri izbranih rastlinskih vrstah iz Idrije

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Ključne besede

Podatki

Jezik:	Slovenski jezik
Leto izida:	2012
Izvor:	Ljubljana
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL BF - Biotehniška fakulteta
Založnik:	[T. Rozina]
UDK:	58(497.4)(043.2)
COBISS:	9264457
Št. ogledov:	2473
Št. prenosov:	659
Ocena:	0 (0 glasov)
Metapodatki:

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Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Accumulation of mercury and arbuscular mycorrhyza in selected plant species from Idrija
Sekundarni povzetek:	Mercury mine in Idrija was the second largest mine of its kind in the world. However, a quarter of the processed mercury (Hg), one of the most toxic pollutants, ended up in the surrounding countryside. The goal of this study was to determine the concentration of Hg in soil and accumulation capacity of certain plants. Another aspect of the study was focused on the relation between Hg soil pollution and growth of arbuscular mycorrhizal (AM) fungi. Samples of soil and plants were collected on different plots: near the chimney of the foundry, near the river Idrijca, in the gardens above the Antonij's mine entry and in the forest near the chimney. Hg concentrations were determined with energy dispersive X-ray fluorescence spectroscopy. AM parameters were based on monitoring of a randomly chosen tripan blue stained root fragments under a light microscope. Effects of Hg on growth were determined with Substrate Induced Respiration method. The results showed that Hg concentrations in soil exceeded the critical levels of 10 mg kg-1. The highest concentration of Hg was near the river Idrijca, while the lowest concentration was found in the gardens above the Antonij's mine. The concentration of Hg in plants tissues depended on Hg concentrations in soil, plant species, soil and Hg types. Hg concentrations were higher in the roots than in the shoots. All examined plant species were colonized with AM fungi, however the arbuscule density negatively correlated with increasing Hg concentrations in soil. The highest level of AM colonization and the highest concentration of AM spores were found near the chimney.
Sekundarne ključne besede:	biology;biologija;
Vrsta datoteke:	application/pdf
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Univ. Ljubljana, Pedagoška fak., Biotehniška fak., Fak. za kemijo in kemijsko tehnologijo, Naravoslovnotehniška fak., Kemija in biologija
Strani:	XII, 72 f., [13] f. pril.
Vrsta dela (ePrints):	thesis
Naslov (ePrints):	Accumulation of mercury and arbuscular mycorrhyza in selected plant species from Idrija
Ključne besede (ePrints):	živo srebro
Ključne besede (ePrints, sekundarni jezik):	mercury
Povzetek (ePrints):	Rudnik živega srebra (Hg) v Idriji je bil drugi največji rudnik na svetu. Kar četrtina celotne proizvodnje Hg, ki je eden najbolj strupenih onesnažil, se je sprostila v okolje. Namen raziskave je bil določiti skupno koncentracijo Hg v tleh in akumulacijsko sposobnost izbranih rastlinskih vrst. Zanimalo nas je tudi, kako onesnaženost tal s Hg vpliva na kolonizacijo izbranih rastlinskih vrst z arbuskularno mikoriznimi glivami in na mikrobno aktivnost tal. Tla in nekaj najpogostejših rastlinskih vrst smo vzorčili na različnih območjih: v bližini dimnika talilnice, v gozdu pod dimnikom, ob reki Idrijci in na vrtovih nad Antonijevim rovom Koncentracije Hg v tleh in rastlinah (korenine, poganjki) smo določili s pomočjo energijsko disperzijske rentgensko fluorescenčne spektrometrije. Določanje parametrov glivne kolonizacije je temeljilo na opazovanju s tripan modrim obarvanih, naključno izbranih koreninskih fragmentov, ki smo jih pregledovali pod svetlobnim mikroskopom. Vpliv Hg na mikrobno aktivnost smo določili z uporabo s substratom inducirane respiracije. Rezultati analize prsti so pokazali, da vsebnost Hg v tleh presega kritične mejne vrednosti, ki znašajo 10 mg kg-1. Največja koncentracija Hg je bila izmerjena ob reki Idrijci, najmanjša pa na vrtovih nad Antonijevim rovom. Stopnja akumulacije Hg v višje rastline je odvisna od koncentracije Hg v tleh, rastlinske vrste, in tipa tal. Koncentracije Hg v koreninah so bile večje kot v poganjkih. Rastline in glive so bile tudi ob povečani koncentraciji Hg sposobne tvorbe mikorize, saj je bila AM kolonizacija ugotovljena pri vseh rastlinskih vrstah, vendar pa je gostota arbuskulov negativno korelirala s povišanimi Hg koncentracijami v tleh. Največja stopnja AM kolonizacije je bila izmerjena od dimniku, kjer smo našteli tudi največ AM spor.
Povzetek (ePrints, sekundarni jezik):	Mercury mine in Idrija was the second largest mine of its kind in the world. However, a quarter of the processed mercury (Hg), one of the most toxic pollutants, ended up in the surrounding countryside. The goal of this study was to determine the concentration of Hg in soil and accumulation capacity of certain plants. Another aspect of the study was focused on the relation between Hg soil pollution and growth of arbuscular mycorrhizal (AM) fungi. Samples of soil and plants were collected on different plots: near the chimney of the foundry, near the river Idrijca, in the gardens above the Antonij's mine entry and in the forest near the chimney. Hg concentrations were determined with energy dispersive X-ray fluorescence spectroscopy. AM parameters were based on monitoring of a randomly chosen tripan blue stained root fragments under a light microscope. Effects of Hg on growth were determined with Substrate Induced Respiration method. The results showed that Hg concentrations in soil exceeded the critical levels of 10 mg kg-1. The highest concentration of Hg was near the river Idrijca, while the lowest concentration was found in the gardens above the Antonij's mine. The concentration of Hg in plants tissues depended on Hg concentrations in soil, plant species, soil and Hg types. Hg concentrations were higher in the roots than in the shoots. All examined plant species were colonized with AM fungi, however the arbuscule density negatively correlated with increasing Hg concentrations in soil. The highest level of AM colonization and the highest concentration of AM spores were found near the chimney.
Ključne besede (ePrints, sekundarni jezik):	mercury
ID:	8310392