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

Cite this document

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

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

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

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 30 November 2024, https://urn.nsk.hr/urn:nbn:hr:181:541383

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 2024 November 30] Available at: https://urn.nsk.hr/urn:nbn:hr:181:541383

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

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Metadata
TitleUtjecaj stresa na fotosintetsku učinkovitost japanskog dvornika (Reynoutria japonica Houtt.)
Title (english)Photosynthetic efficiency of Japanese knotweed (Reynoutria japonica Houtt.) in stressful conditions
AuthorIvona Kirchbaum
MentorSelma Mlinarić (mentor)
GranterJosip Juraj Strossmayer University of Osijek
Department of biology
Osijek
Defense date and country2020-09-18, 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)
Languagecroatian
URN:NBNurn:nbn:hr:181:541383
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 conditionsEmbargoed access
Embargo expiration date: 2025-10-12
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Created on2020-10-12 09:49:12