prikaz prve stranice dokumenta Oporavak klijanaca ozime pšenice nakon suše izazvane polietilen glikolom
Embargo period 2026-01-26
master's thesis
Oporavak klijanaca ozime pšenice nakon suše izazvane polietilen glikolom
2020. urn:nbn:hr:181:562949
Šimić, Mario
Josip Juraj Strossmayer University of Osijek
Department of biology

Cite this document

Šimić, M. (2020). Oporavak klijanaca ozime pšenice nakon suše izazvane polietilen glikolom (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of biology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:181:562949

Šimić, Mario. "Oporavak klijanaca ozime pšenice nakon suše izazvane polietilen glikolom." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, 2020. https://urn.nsk.hr/urn:nbn:hr:181:562949

Šimić, Mario. "Oporavak klijanaca ozime pšenice nakon suše izazvane polietilen glikolom." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, 2020. https://urn.nsk.hr/urn:nbn:hr:181:562949

Šimić, M. (2020). 'Oporavak klijanaca ozime pšenice nakon suše izazvane polietilen glikolom', Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, accessed 03 November 2024, https://urn.nsk.hr/urn:nbn:hr:181:562949

Šimić M. Oporavak klijanaca ozime pšenice nakon suše izazvane polietilen glikolom [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of biology; 2020 [cited 2024 November 03] Available at: https://urn.nsk.hr/urn:nbn:hr:181:562949

M. Šimić, "Oporavak klijanaca ozime pšenice nakon suše izazvane polietilen glikolom", Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of biology, Osijek, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:181:562949

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Metadata
TitleOporavak klijanaca ozime pšenice nakon suše izazvane polietilen glikolom
Title (english)RECOVERY OF WINTER WHEAT SEEDLINGS SUBJECTED TO DROUGHT INDUCED BY POLYETHYLENE GLYCOL
AuthorMario Šimić
MentorJasenka Antunović Dunić (mentor)
MentorVesna Peršić (komentor)
Committee memberVera Cesar-Lepeduš (predsjednik povjerenstva)
Committee memberDavorka Hackenberger Kutuzović (član povjerenstva)
Committee memberVesna Peršić (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Department of biology
Osijek
Defense date and country2020-11-27, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
Suša je važan okolišni stres koji ograničava biljnu proizvodnju širom svijeta, a pšenica (Triticum aestivum L.) je jedna je od glavnih prehrambenih žitarica pogođenih sušom. Cilj je bio istražiti na koji način se šest sorti ozime pšenice suočavaju s dehidracijom i oporavkom na morfološkoj, fiziološkoj i biokemijskoj razini. Tri dana stari klijanci izloženi su fiziološkoj suši tijekom šest dana (-0,3 MPa), nakon čega je uslijedio jedan dan rehidracije do oporavka. Visoki sadržaj prolina, minimalno smanjenje relativnog sadržaja vode i zadržavanje stabilnosti staničnih membrana istraživanih kultivara u uvjetima suše usko su povezani i ukazuju na visoku sposobnost tolerancije na dehidraciju. Fluorescencija klorofila a listova klijanaca pokazala je visoku stabilnost kvantnog prinosa primarne fotokemije PS II u uvjetima blagog stresa ukazujući da mlađa fotosintetska tkiva imaju visoku toleranciju na sušu. Kultivar L459-2012 zadržao je visoku stabilnost fotosintetskog aparata tijekom dehidracije i rehidracije. Kod ostalih kultivara, a najviše kod Osk 4.40/7-82 i 381/06 promjena amplitude iz pozitivne u negativnu sugerira da dolazi do povećanja grupiranosti jedinica PSII te veće razmjene energije rehidracijom ukazujući da je kod tih kultivara prethodna dehidracija imala u osnovi pozitivan efekt na fotosintetski aparat i da ukupna stabilnost sustava nije oštećena. Zaključno, kratkotrajno izlaganje suši može biti korisno za rast pšenice u ranoj fazi razvoja, što u konačnici može pridonijeti našem razumijevanju načina na koji biljke maksimalno iskorištavaju ograničene vodne resurse.
Abstract (english)
Drought is an important environmental stress, limiting crop production worldwide, and wheat (Triticum aestivum L.) is one of the main cereals affected by drought. The aim was to investigate how six winter wheat cultivars face dehydration and recovery at the morphological, physiological, and biochemical levels. Three-day-old seedlings were exposed to physiological drought (-0,3 MPa) for six days, followed by one day of rehydration treatment for recovery. High proline content, a minimal decrease of relative water content, and the stability of cell membranes were closely related and indicated the high ability of dehydration tolerance. High efficiency of PSII primary photochemistry under mild stress conditions obtained by fluorescence measurement also indicated high drought tolerance of young photosynthetic tissues. Cultivar L459-2012 retained high stability of the photosynthetic apparatus during both dehydration and rehydration treatment. In other cultivars, especially in Osk 4.40/7-82 and Osk 381/06, an amplitude changed from positive to negative, suggesting that the PSII units had better excitation energy utilization upon recovery and the overall system stability was not damaged. To conclude, despite the variabilities in cultivars' response to water deficit and recovery, the results showed the beneficial effect of shortterm drought for early-stage wheat growth, which can ultimately contribute to our understanding of how plants make maximum use of limited water resources.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:181:562949
Study programmeTitle: Master of Science Graduate University Study Programme in Biology; specializations in: Master of Biology
Course: Master of Biology
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra biologije (magistar/magistra biologije)
Type of resourceText
File originBorn digital
Access conditionsEmbargoed access
Embargo expiration date: 2026-01-26
Terms of useLicence In copyright icon
Created on2021-01-26 15:09:36