Utjecaj ekstremnog zasušivanja na biokemijske i fiziološke značajke sadnica kapara

master's thesis

• Title (english): The impact of extreme drought stress on biochemical and physiological characteristics of caper seedlings
• Author: Dario Srebačić
• Mentor: Ivanka Habuš Jerčić (mentor)
• Committee member: Ivanka Habuš Jerčić (predsjednik povjerenstva)
• Committee member: Boris Lazarević (član povjerenstva)
• Committee member: Snježana Kereša (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Plant Breeding Genetics, Biometrics and Experimentation); Zagreb
• Defense date and country: 2022-02-18, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Suša se ubraja u jedan od najčešćih abiotskih stresova, a karakterizira je manjak oborina kroz dulji vremenski period u odnosu na prosječne oborinske prilike nekog područja. Stres suše negativno utječe na rast i razvoj biljaka tijekom njihove vegetacije. Biljke su s vremenom razvile nekoliko antioksidacijskih mehanizama kojima uklanjaju toksične komponente koje se nakupljaju tijekom stresa suše. Neki od enzima koje biljke nakupljaju imaju antioksidacijsko djelovanje, a s povećanjem antioksidacijske aktivnosti može se povećati tolerantnost na stres suše. Cilj istraživanja bio je utvrditi utjecaj ekstremnog zasušivanja na relativni sadržaj vode (RWC), sadržaj ukupnih proteina te aktivnost antioksidacijskih enzima superoksid dismutaze (SOD) te peroksidaze (POX) u listu sadnica kapara. Stres suše (zasušivanja) značajno utječe na sva mjerena svojstva. RWC u listu, kao i ukupni sadržaj topljivih proteina značajno se smanjio, dok se aktivnost SOD-a i POX-a značajno povećavala s intenzitetom suše.

Abstract (english)

Drought is one of the most common types of abiotic stress and is characterized by the lack of precipitation over a long period of time compared to average precipitation in a certain area. Drought stress negatively affects the growth and development of plants during their vegetation. Over time, plants have developed several antioxidant mechanisms to remove toxic components that accumulate during drought stress. Some of the enzymes that plants accumulate have antioxidant activity and by increasing antioxidant activity, drought stress tolerance may increase. The aim of the study was to determine the effect of extreme drought on relative water content (RWC), total protein content and activity of antioxidant enzymes superoxide dismutase (SOD) and peroxidase (POX) in caper seedling leaves. Drought stress significantly affects all measured properties. The RWC in leaves as well as the total soluble protein content decreased significantly, while the activity of SOD and POX increased with drought intensity.

• Keywords: suša; kapar; RWC; ukupni proteini; SOD; POX
• Keywords (english): drought; caper; RWC; total protein; SOD; POX
• Language: croatian
• URN:NBN: urn:nbn:hr:204:994990
• Study programme: Title: Plant Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar / magistra inženjer/inženjerka biljnih znanosti (magistar / magistra inženjer/inženjerka biljnih znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-03-24 07:28:45