Pregled bibliografske jedinice broj: 1095047
Anatomy, chlorophyll content and photosynthetic performance in currentyear and previous-year Aleppo pine (Pinus halepensis Mill.) needles
Anatomy, chlorophyll content and photosynthetic performance in currentyear and previous-year Aleppo pine (Pinus halepensis Mill.) needles // Botanica Serbica, 44 (2020), 1; 61-69 doi:10.2298/BOTSERB2001061T (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 1095047 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Anatomy, chlorophyll content and photosynthetic performance in currentyear and previous-year Aleppo pine (Pinus halepensis Mill.) needles
Autori
Trstenjak, Tomo ; Antunović Dunić, Jasenka ; Mlinarić, Selma ; Begović, Lidija ; Škoro, Marin ; Cesar, Vera ; Lepeduš, Hrvoje
Izvornik
Botanica Serbica (1821-2158) 44
(2020), 1;
61-69
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Aleppo pine, chlorophyll a fluorescence, needle anatomy, needle development, Pinus halepensis, photosynthesis
Sažetak
Aleppo pine (Pinus halepensis) is a widespread Mediterranean woody species. Needles usually fall off the tree after the second year, which can be the reason for substantial crown defoliation under extreme environmental stress. The aim of the present investigation was to compare the anatomy, chlorophyll content and photosynthetic performance in current-year (CY) and previous-year (PY) Aleppo pine needles. Chlorophyll concentrations were determined spectrophotometrically, while photosynthetic performance was determined by measuring the increase in chlorophyll a fluorescence (the JIP test). The obtained results revealed that concentrations of chlorophylls a and b were almost twice as great in PY needles as in CY ones. The chlorophyll a to b ratio and values of the maximum quantum yield of photosystem II (Fv/Fm) showed no statistically significant difference between CY and PY needles. However, the performance index (PIABS) was significantly higher in CY needles compared to PY ones. Analysis of PIABS components revealed that CY needles had increased electron transport beyond the primary electron acceptor, QA-, which was associated with a lower value of variable fluorescence at 2 ms (VJ) in comparison with PY needles. Also, some differences were observed in needle anatomy. Current-year needles had an increased proportion of mesophyll tissue, together with decreased proportions of vascular cylinder and resin duct areas. Also, many more starch grains were present in PY than in CY needles. Based on the presented results, it can be concluded that despite considerably lower chlorophyll content, CY needles exhibited photosynthetic performance better than that of older needles, which is an unusual phenomenon in woody species.
Izvorni jezik
Engleski
Znanstvena područja
Biologija, Šumarstvo
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,
Fakultet za dentalnu medicinu i zdravstvo, Osijek
Profili:
Lidija Begović
(autor)
Jasenka Antunović Dunić
(autor)
Vera Cesar-Lepeduš
(autor)
Selma Mlinarić
(autor)
Hrvoje Lepeduš
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus