Enhanced thermal stability of the thylakoid membranes from spruce. A comparison with selected angiosperms
Jazyk angličtina Země Nizozemsko Médium print-electronic
Typ dokumentu srovnávací studie, časopisecké články
PubMed
27154572
DOI
10.1007/s11120-016-0269-3
PII: 10.1007/s11120-016-0269-3
Knihovny.cz E-zdroje
- Klíčová slova
- Circular dichroism, Norway spruce, Photosystem II organization, Thermal stability, Thylakoid membrane,
- MeSH
- Arabidopsis cytologie fyziologie MeSH
- chlorofyl a MeSH
- chlorofyl fyziologie MeSH
- cirkulární dichroismus MeSH
- elektroforéza v polyakrylamidovém gelu MeSH
- fluorescence MeSH
- fotosystém II - proteinový komplex fyziologie MeSH
- ječmen (rod) cytologie fyziologie MeSH
- smrk cytologie fyziologie MeSH
- tylakoidy fyziologie MeSH
- vysoká teplota MeSH
- Publikační typ
- časopisecké články MeSH
- srovnávací studie MeSH
- Názvy látek
- chlorofyl a MeSH
- chlorofyl MeSH
- fotosystém II - proteinový komplex MeSH
Recently, we have found that thermal stability of photosystem II (PSII) photochemistry in spruce needles is higher than in other plants (barley, beech) cultivated under the same temperatures. In this work, temperature dependences of various characteristics of PSII organization were studied in order to obtain complex information on the thermal stability of PSII function and organization in spruce. Temperature dependency of circular dichroism spectra revealed by about 6 °C higher thermal stability of macrodomain organization in spruce thylakoid membranes in comparison with Arabidopsis and barley ones; however, thermal disintegration of light-harvesting complex of PSII did not significantly differ among the species studied. These results thus indicate that thermal stability of PSII macro-organization in spruce thylakoid membranes is enhanced to a similar extent as thermal stability of PSII photochemistry. Clear-native polyacrylamide gel electrophoresis of preheated thylakoids demonstrated that among the separated pigment-protein complexes, only PSII supercomplexes (SCs) revealed considerably higher thermal stability in spruce thylakoids as compared to Arabidopsis and barley ones. Hence we suggest that higher thermal stability of PSII macro-organization of spruce is influenced by the maintenance of PSII SCs in the thylakoid membrane. In addition, we discuss possible effects of different PSII organizations and lipid compositions on the thermal stability of spruce thylakoid membranes.
Faculty of Science Ostrava University 30 dubna 22 701 03 Ostrava 1 Czech Republic
Global Change Research Institute CAS Bělidla 986 4a 603 00 Brno Czech Republic
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