Utjecaj stresa na fotosintetsku učinkovitost japanskog dvornika
 (Reynoutria japonica Houtt.)

Kirchbaum, Ivona

prikaz prve stranice dokumenta Utjecaj stresa na fotosintetsku učinkovitost japanskog dvornika (Reynoutria japonica Houtt.)

Embargo period 2025-10-12

undergraduate thesis

Utjecaj stresa na fotosintetsku učinkovitost japanskog dvornika (Reynoutria japonica Houtt.)

Osijek: Josip Juraj Strossmayer University of Osijek, Department of biology, 2020. urn:nbn:hr:181:541383

Kirchbaum, Ivona

Josip Juraj Strossmayer University of Osijek
Department of biology

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APA 6th Edition

Kirchbaum, I. (2020). Utjecaj stresa na fotosintetsku učinkovitost japanskog dvornika (Reynoutria japonica Houtt.) (Undergraduate thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of biology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:181:541383

MLA 8th Edition

Kirchbaum, Ivona. "Utjecaj stresa na fotosintetsku učinkovitost japanskog dvornika (Reynoutria japonica Houtt.)." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, 2020. https://urn.nsk.hr/urn:nbn:hr:181:541383

Chicago 17th Edition

Harvard

Kirchbaum, I. (2020). 'Utjecaj stresa na fotosintetsku učinkovitost japanskog dvornika (Reynoutria japonica Houtt.)', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, accessed 24 March 2025, https://urn.nsk.hr/urn:nbn:hr:181:541383

Vancouver

Kirchbaum I. Utjecaj stresa na fotosintetsku učinkovitost japanskog dvornika (Reynoutria japonica Houtt.) [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of biology; 2020 [cited 2025 March 24] Available at: https://urn.nsk.hr/urn:nbn:hr:181:541383

IEEE

I. Kirchbaum, "Utjecaj stresa na fotosintetsku učinkovitost japanskog dvornika (Reynoutria japonica Houtt.)", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, Osijek, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:181:541383

Cite this item: https://urn.nsk.hr/urn:nbn:hr:181:541383

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Title	Utjecaj stresa na fotosintetsku učinkovitost japanskog dvornika (Reynoutria japonica Houtt.)
Title (english)	Photosynthetic efficiency of Japanese knotweed (Reynoutria japonica Houtt.) in stressful conditions
Author	Ivona Kirchbaum
Mentor	Selma Mlinarić (mentor)
Granter	Josip Juraj Strossmayer University of Osijek Department of biology Osijek
Defense date and country	2020-09-18, Croatia
Scientific / art field, discipline and subdiscipline	NATURAL SCIENCES Biology
Abstract	Niske temperature mogu predstavljati stresne uvjete za biljke i negativno utjecati na njihove fiziološke i biokemijske procese kao što je fotosinteza. Cilj ovog rada bio je proučiti utjecaj niske temperature (5°C) na fotosintetsku učinkovitost Japanskog dvornika (Reynoutria japonica Houtt.) nakon različite duljine izlaganja (1, 2, 4, 6, 8, 16, 24 i 48 sati). U tu svrhu mjerena je fluorescencija klorofila a. Analizom parametra JIP-testa opisan je prijenos energije reakcijskim središtima fotosustava II te indeks fotosintetske učinkovitosti (PIABS). Kratkotrajna izlaganja biljaka niskoj temperaturi (1-16 sati) nisu pokazala negativan utjecaj na prijenos energije po aktivnom reakcijskom središtu, dok je kod dugotrajnijih izlaganja (24 i 48 sati) niska temperatura dovela do stvaranja neaktivnih, odnosno „utišanih“ reakcijskih središta. Smanjenje indeksa fotosintetske učinkovitosti (PIABS) već pri kratkom izlaganju niskoj temperaturi ukazuje na ograničenje prijenosa elektrona dalje od primarnog akceptora u transportnom lancu elektrona.
Abstract (english)	Low temperatures can present stressful conditions for some plants and it can have a negative effect on their physiological and biochemical processes such as photosynthesis. The aim of this study was to determine the effect of low temperature (5°C) on photosynthetic efficiency of Japanese knotweed (Reynoutria japonica Houtt.) after different length of exposure (1, 2, 4, 8, 16, 24 and 48 hours) on its.). To determine the parameters of photosynthetic efficiency, the chlorophyll a fluorescence was measured. The analysis of JIP test parameters described the energy transfer through reaction centres of photosystem II and the performance index (PIABS). Short-term exposures of plants to low temperature (1-16 hours) did not show a negative impact on energy fluxes per active reaction centre, while longer exposures (24 and 48 hours) to low temperature caused the formation of inactive or "silent" ones. The decrease of performance index (PIABS) even at short exposure to low temperature indicated a limitation of electron transport after the primary acceptor in the electron transport chain.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:181:541383
Study programme	Title: 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 resource	Text
File origin	Born digital
Access conditions	Embargoed access Embargo expiration date: 2025-10-12
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Repository	Repository of Department of biology, Josip Juraj Strossmayer University of Osijek
Created on	2020-10-12 09:49:12