Pregled bibliografske jedinice broj: 789090
Photosynthetic response of young and mature fig leaves to high irradiation
Photosynthetic response of young and mature fig leaves to high irradiation // Zbornik sažetaka (Hrvatski biološki kongres s međunarodnim sudjelovanjem) / Klobučar, Göran ; Kopjar, Nevenka ; Gligora Udovič, Marija ; Lukša, Žaklin ; Jelić, Dušan (ur.).
Zagreb: Hrvatsko biološko društvo, 2015. str. 99-100 (predavanje, domaća recenzija, sažetak, znanstveni)
CROSBI ID: 789090 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Photosynthetic response of young and mature fig leaves to high irradiation
Autori
Mlinarić, Selma ; Cesar, Vera ; Lepeduš, Hrvoje
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Zbornik sažetaka (Hrvatski biološki kongres s međunarodnim sudjelovanjem)
/ Klobučar, Göran ; Kopjar, Nevenka ; Gligora Udovič, Marija ; Lukša, Žaklin ; Jelić, Dušan - Zagreb : Hrvatsko biološko društvo, 2015, 99-100
Skup
12. hrvatski biološki kongres s međunarodnim sudjelovanjem
Mjesto i datum
Sveti Martin na Muri, Hrvatska, 18.09.2015. - 23.09.2015
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Domaća recenzija
Ključne riječi
Ficus carica L.; photosynthesis; light stress; chlorophyll a fluorescence
( Ficus carica L.; photosynthesis; light stress; chlorophyll a fluorescence)
Sažetak
High irradiation often causes photoinhibition due to limited electron transport and reduced photosynthetic quantum conversion. We aimed to investigate influence of high irradiation on photosynthetic performance of young (YL) and mature (ML) fig leaves (Ficus carica L.) exposed to elevated temperature. Detached YL and ML were acclimated at room temperature in darkness for 12h and then exposed to 35±1°C combined with low (LI, ~50 µmolm-2s-1) or high irradiation (HI, ~800 µmolm-2s-1) for 4h. To evaluate primary photochemistry of photosystem II (PSII), modulated chlorophyll a fluorescence was measured. High maximum quantum yield of PSII photochemistry (Fv/Fm) indicated full functionality of both leaf types exposed to LI. Exposure of ML to HI induced significant reduction of Fv/Fm, followed with decreased electron transport rate (ETR) and non- photochemical quenching (NPQ). Increase in the quantum yield of non-regulated energy dissipation (Y(NO)), accompanied with decline in both, the effective quantum yield of photochemical energy conversion in PSII (Y(PSII)) and the quantum yield of pH-dependant energy dissipation (Y(NPQ)), suggested reduced capacity of photoprotective reactions. YL exposed to HI showed no significant difference in all measured parameters compared to LI, thus indicating stable photosynthetic performance. In conclusion, YL maintained efficient photoprotective mechanisms at HI, while increased susceptibility of ML to HI resulted with severe photoinhibition.
Izvorni jezik
Engleski
Znanstvena područja
Biologija
POVEZANOST RADA
Projekti:
073-0731674-1673 - Utjecaj oksidativnog stresa na organizaciju i funkciju biljnih stanica i tkiva (Lepeduš, Hrvoje, MZOS ) ( CroRIS)
073-0731674-0841 - Stanična i tkivna diferencijacija tijekom razvoja biljnih organa
Ustanove:
Sveučilište u Osijeku - Odjel za biologiju