Interspecific variations of photochemical properties in a xerotherm grassland community
In this work the role of xanthophyll cycle an d its relation to the photosynthetic activity in the dominant species of a semiarid sandy grassland community (Potentillo-Festucetum pseudovinae) were studied during the stressful summer period . The total amount of xanthophyll cycle pigments (violaxanth...
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| Dokumentumtípus: | Cikk |
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2002
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| Sorozat: | Acta biologica Szegediensis
46 No. 3-4 |
| Kulcsszavak: | Természettudomány, Biológia |
| Online Access: | http://acta.bibl.u-szeged.hu/22573 |
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| 040 | |a SZTE Egyetemi Kiadványok Repozitórium |b hun | ||
| 041 | |a eng | ||
| 100 | 1 | |a Veres Szilvia | |
| 245 | 1 | 0 | |a Interspecific variations of photochemical properties in a xerotherm grassland community |h [elektronikus dokumentum] / |c Veres Szilvia |
| 260 | |c 2002 | ||
| 300 | |a 237-238 | ||
| 490 | 0 | |a Acta biologica Szegediensis |v 46 No. 3-4 | |
| 520 | 3 | |a In this work the role of xanthophyll cycle an d its relation to the photosynthetic activity in the dominant species of a semiarid sandy grassland community (Potentillo-Festucetum pseudovinae) were studied during the stressful summer period . The total amount of xanthophyll cycle pigments (violaxanthin, anteraxanthin, zeaxanthin) related to total chlorophyll content (VAZ pool) showed considerable interspecific alterations and it was 2-3 times larger in the summer period than in spring. The changes in the xanthophyll cycle , the potential (FyFm) and actual photochemical efficiency (AF/Fm) of PSII, as well as, the results of parallel measurements on their daily dynamics show that zeaxanthin has a major role in the photoinhibition in the photosynthetic apparatus during the summer stress on sandy grassland species. In July, the decrease s of F/F m was accompanied with increases of NPQ at the 100-120% extentt depending on the species. | |
| 695 | |a Természettudomány, Biológia | ||
| 710 | |a Hungarian Congress on Plant Physiology, 7., 2002, Szeged | ||
| 856 | 4 | 0 | |u http://acta.bibl.u-szeged.hu/22573/1/08-ver.pdf |z Dokumentum-elérés |