Fotosinteza cijanobakterija - prvi korak u pretvorbi energije

undergraduate thesis

• Title (english): Photosynthesis in cyanobacteria- first step of the energy conversion
• Author: Adriana Matić
• Mentor: Marija Gligora Udovič (mentor)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2018, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Oksidacijska fotosinteza je proces kojim se Sunčeva energija pretvara u kemijsku
energiju. Fotosintetski prokarioti koji imaju sposobnost fotosinteze su cijanobakterije.
Oksidacijska fotosinteza događa se u tilakoidnim membranama gdje svjetlost apsorbiraju
pigmenti. U cijanobakterija razlikujemo sljedeće pigmente - klorofili a, karotenoide i
fikobiliproteine.
Reakcija oksidacijska fotosinteze počinje hvatanjem svjetlosti sustavom antena koja
se onda prenosi do dva velika fotosustava - fotosustav II i fotosustav I koji su funkcionalno
povezani plastokinonom (PQ), citokromom b6f kompleksom i luminalnim nosačima
elektrona. Reakcije lanca transporta elektrona dovode do elektrokemijskog protonskog
gradijenta koji pokreće sintezu ATP uz pomoć ATP sintaze. U ovom radu opisana je sturuktura i
funkcija glavnih proteinskih kompleksa koji kataliziraju prvi korak u pretvorbi energije.

Abstract (english)

Oxygenic photosynthesis is the process of transforming light energy from the Sun into
chemical energy. Photosynthetic prokaryotes that have the ability of photosynthesis are
cyanobacteria. Oxidation photosynthesis occurs in thylakoid membranes where pigments
absorbs light. In cyanobacteria we have the following pigments - chlorophylls, carotenoids
and ficobyl proteins.
The oxygenic photosynthesis begins by capturing the light by an antenna system and
transferred to two large photosystems - the photosystem II and the photosystem I, which are
functionally coupled by the plastoquinone (PQ), the cytochrome b6f complex and luminal
electron carriers. The reactions of electron transport chain lead to an electrochemical proton
gradient, which drives synthesis of ATP by molecular motor, the ATP synthase.
This paper describes the structure and function of main protein complexes that
catalyze the first step in energy conversion.

• Keywords: cijanobakterije; fotosinteza
• Language: croatian
• URN:NBN: urn:nbn:hr:217:254899
• Study programme: Title: Environmental Sciences; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) struke znanosti o okolišu (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-10-02 07:04:27