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undergraduate thesis
Selen - antioksidans ili prooksidans?
2016. urn:nbn:hr:181:256751
Bošnjaković, Rebeka
Josip Juraj Strossmayer University of Osijek
Department of biology

Cite this document

Bošnjaković, R. (2016). Selen - antioksidans ili prooksidans? (Undergraduate thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of biology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:181:256751

Bošnjaković, Rebeka. "Selen - antioksidans ili prooksidans?." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, 2016. https://urn.nsk.hr/urn:nbn:hr:181:256751

Bošnjaković, Rebeka. "Selen - antioksidans ili prooksidans?." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, 2016. https://urn.nsk.hr/urn:nbn:hr:181:256751

Bošnjaković, R. (2016). 'Selen - antioksidans ili prooksidans?', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, accessed 21 November 2024, https://urn.nsk.hr/urn:nbn:hr:181:256751

Bošnjaković R. Selen - antioksidans ili prooksidans? [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of biology; 2016 [cited 2024 November 21] Available at: https://urn.nsk.hr/urn:nbn:hr:181:256751

R. Bošnjaković, "Selen - antioksidans ili prooksidans?", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, Osijek, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:181:256751

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Metadata
TitleSelen - antioksidans ili prooksidans?
Title (english)Selenium -antioxidant or prooxidant?
AuthorRebeka Bošnjaković
MentorIvna Štolfa Čamagajevac (mentor)
Committee memberIvna Štolfa Čamagajevac (predsjednik povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Department of biology
Osijek
Defense date and country2016-09-20, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
Selen je u tragovima esencijalan mikronutrijent i iznimno je koristan za čovjeka i životinje, no njegova esencijalnost nije dokazana za više biljke. Specifični fiziološki mehanizmi, koji su zaslužni za njegovo pozitivno djelovanje u antioksidacijskoj obrani biljaka još nisu u potpunosti razjašnjeni. Selen ima dvojako djelovanje na biljke; u malim koncentracijama djeluje kao antioksidans, dok u velikim djeluje kao prooksidans. Cilj ovog rada bio je utvrditi kako različiti oblici i koncentracije Se utječu na antioksidacijski sustav, odnosno aktivnosti glutation-reduktaze i katalaze u izdancima pšenice (Triticum aestivum L.) sorte Divana. Pšenica je tretirana trima različitim koncentracijama dva oblika Se (selenit i selenat). Sve koncentracije oba oblika selena nisu aktivirale katalazu.S druge strane, povećanje aktivnosti glutation-reduktaze uzrokovale su samo dvije veće koncentracije selenata, dok je taj efekt izostao kod tretmana selenitom što se može povezati s učinkovitijom mobilnošću selenata u nadzmne dijelove biljke.Dobiveni rezultati mogu poslužiti kao osnova za daljnja istraživanja o učincima viših koncentracija selena na različite komponente antioksidativnog sustava.
Abstract (english)
As a trace elementselenium is an essential micronutrinet and has important benefits for human and animals, but its essentiality has not been proven yet for higher plants. The specific physiological mechanisms that are responsible for positive effects in plants, primarily in antioxidant defense, have not yet been clarified. Selenium has dual effect on plants, in low concentrations acts as an antioxidant, while in higher concentrations acts as a pro-oxidant. The aim of this study was to determine how different forms and concentrations of selenium influence the antioxidant system, especiallyactivities of glutathione reductase and catalase in the shoots of wheat (Triticum aestivum L.) cv. Divana. Wheat was treated with three different concentrations of two forms of Se (selenite and selenate). All concentrations of both selenium forms did not activate catalase. On the other hand, only the two highest selenate concentrations caused increase in glutathione reductase activity, while selenite did not have such an effect what can be connected with more efficient mobility of selenate in upper parts of plants. Obtained results can serve as a basis for fruther research of the effects of higher selenium concentrations on the various antioxidant systemcomponents.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:181:256751
Study programmeTitle: Undergraduate University Study Programme in Biology (Bachelor of Science)
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2017-01-30 11:33:46