Pregled bibliografske jedinice broj: 1183916
Chlorophylls content and photosynthetic performance in Aleppo pine needles
Chlorophylls content and photosynthetic performance in Aleppo pine needles // 13th Croatian biological congress with International Participation / Kružić, Petar ; Caput Mihalić, Katarina ; Gottstein, Sanja ; Pavoković, Dubravko ; Kučinić, Mladen (ur.).
Zagreb: Hrvatsko biološko društvo, 2018. str. 213-214 (poster, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 1183916 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Chlorophylls content and photosynthetic performance
in Aleppo pine needles
Autori
Trstenjak, Tomo ; Lepeduš, Hrvoje ; Antunović Dunić, Jasenka ; Mlinarić, Selma ; Cesar, Vera
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
13th Croatian biological congress with International Participation
/ Kružić, Petar ; Caput Mihalić, Katarina ; Gottstein, Sanja ; Pavoković, Dubravko ; Kučinić, Mladen - Zagreb : Hrvatsko biološko društvo, 2018, 213-214
Skup
13. Hrvatski biološki kongres
Mjesto i datum
Poreč, Hrvatska, 19.09.2018. - 23.09.2018
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
Aleppo pine, chlorophyll a fluorescence, photosynthesis, photosystem II, Pinus
Sažetak
Aleppo pine (Pinus halepensis L.) is widely spread Mediterranean woody species. Its natural and cultivated populations can be frequently found in the coastal area of the Adriatic Sea. Usually, needles fall down after the second year, what can be the reason for substantial crown defoliation under extreme environmental stress. The aim of this investigation was to compare the chlorophylls content and photosynthetic performance in current- year (CY) and previousyear (PY) A. pine needles. Chlorophylls concentrations were determined spectrophotometrically and the photosynthetic performance was determined by measuring the increase in chlorophyll a fluorescence (JIP test). Results revealed that concentrations of chlorophylls a and b were almost two folded in PY needles compared to CY ones, what was statistically significant. Chlorophylls a to b ratio and values of the maximum quantum yield of the photosystem II (Fv/Fm) showed no statistical significance between CY and PY needles. However, performance index (PIABS) was significantly higher in CY needles compared to PY ones. Based on the presented results it can be concluded that despite of considerably lower chlorophylls content, CY needles reveled enhanced photosynthetic performance than older needles. The analysis of JIP test parameters showed that the main reason for this was better utilization of absorbed light energy in CY needles due to their more competent photosynthetic electron transport, in comparison to PY needles.
Izvorni jezik
Engleski
Znanstvena područja
Biologija
POVEZANOST RADA
Projekti:
MZOS-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:
Filozofski fakultet, Osijek,
Sveučilište u Osijeku - Odjel za biologiju
Profili:
Jasenka Antunović Dunić
(autor)
Vera Cesar-Lepeduš
(autor)
Selma Mlinarić
(autor)
Hrvoje Lepeduš
(autor)