Uloga flavonoida u zaštiti biljnog organizma od okolišnog stresa

undergraduate thesis

• Title (english): The role of flavonoids in protecting the plant organism from environmental stress
• Author: Iva Kuštović
• Mentor: Ivana Šola (mentor)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2024-09-11, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Flavonoidi su specijalizirani metaboliti prisutni u biljkama poznati po ulozi u obrambenim odgovorima na stres. Zbog sve češćih ekstremnih uvjeta u okolišu poput suša, poplava, visokih i niskih temperatura, povećane koncentracije teških metala u tlu i pojačanog intenziteta UV zračenja, biljkama su potrebni efikasni mehanizmi zaštite. Ovakvi abiotički faktori stresa često paralelno biljke čine podložnijima i biotičkim stresorima, tj. patogenima. Flavonoidi doprinose zaštiti biljnog organizma prvenstveno svojom antioksidacijskom aktivnosti koja omogućuje neutralizaciju reaktivnih kisikovih vrsta (ROS, reactive oxygen species), spojeva čija se koncentracija značajno povećava kao posljedica stresa. Flavonoidi su prisutni u različitim staničnim organelima, poput vakuole, jezgre i kloroplasta, gdje pomažu pri inhibiciji ROS-ova i stabilizaciji staničnih membrana. U ovome radu prikazana su odabrana istraživanja povezana s flavonoidima i njihovom ulogom u odgovoru na stres, pritom naglašavajući njihov značaj u stjecanju otpornosti biljaka uslijed promjenjivih okolišnih uvjeta.

Abstract (english)

Flavonoids are specialized metabolites present in plants known for their role in defense responses to stress. Due to increasingly frequent extreme conditions in the environment such as drought, flood, high and low temperatures, increased concentration of heavy metals in the soil and increased intensity of UV radiation, plants need efficient protection mechanisms. Such abiotic stress factors often simultaneously make plants more susceptible to biotic stressors, i.e. pathogens. Flavonoids contribute to the protection of the plant organism primarily through their antioxidant activity, which enables the neutralization of reactive oxygen species (ROS), compounds whose concentration increases significantly as a result of stress. Flavonoids are present in various cell organelles, such as the vacuole, nucleus and chloroplast, where they help inhibit ROS and stabilize cell membranes. This paper presents selected researches related to flavonoids and their role in the response to stress, emphasizing their importance in the acquisition of plant resistance due to changing environmental condition

• Keywords: abiotički stres; antioksidans; biotički stres; flavonoidi
• Keywords (english): abiotic stress; antioxidant; biotic stress; flavo
• Language: croatian
• URN:NBN: urn:nbn:hr:217:979708
• Project: Number: IP-2020-02-7585; Title: Indirektni utjecaj globalnog zagrijavanja na fiziološke parametre sisavaca prehranom biljkama uzgojenim pri visokoj temperaturi; Title: Indirect Effect of Global Warming on Mammals Physiological Parameters via High Temperature-Stressed Plant Diet; Acronym: TEMPHYS; Leader: Ivana Šola; Jurisdiction: Croatia; Funder: Hrvatska zaklada za znanost; Funding stream: Research Projects
• Study programme: Title: Biology; 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 resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-09-18 09:46:42