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Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales
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SYSNO ASEP 0508279 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales Author(s) Kaftan, David (MBU-M) ORCID
Medová, Hana (MBU-M)
Selyanin, Vadim (MBU-M) RID
Kopejtka, Karel (MBU-M) ORCID, RID
Koblížek, Michal (MBU-M) RID, ORCIDSource Title Photosynthetica. - : Ústav experimentální botaniky AV ČR, v. v. i. - ISSN 0300-3604
Roč. 57, č. 2 (2019), s. 361-366Number of pages 6 s. Language eng - English Country CZ - Czech Republic Keywords aerobic anoxygenic phototrophs ; Rhodobaca barguzinensis ; Roseobacter Subject RIV EF - Botanics OECD category Plant sciences, botany R&D Projects LO1416 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA15-00703S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support MBU-M - RVO:61388971 UT WOS 000468117400001 EID SCOPUS 85067655426 DOI 10.32615/ps.2019.039 Annotation Temperature is one of the most important physical factors affecting microbial and biochemical processes. We investigated the performance of photosynthetic apparatus of marine photoheterotrophic bacterium Dinoroseobacter shibae under various temperatures. The primary photochemistry and electron transport was measured using variable infra-red fluorometry in the cells grown between 8-35 degrees C. It was found that the photosynthetic electron transport had a broad temperature optimum between 25-50 degrees C. Moreover, the primary charge separation stayed functional even after rising temperature up to 55 degrees C. The same phenomenon was observed also in other phototrophic Rhodobacterales. The psychrotolerant bacterium Roseisalinus antarcticus reached its maximum electron transport rate at 48 degrees C, 30 degrees C above its growth temperature. We propose that the extended temperature stability may be crucial to maintain photosynthetic function under situation when photosynthetic membranes heat up above their ambient temperature due to the heat dissipation of the excess light energy. Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2020 Electronic address https://ps.ueb.cas.cz/artkey/phs-201902-0001_extended-temperature-optimum-of-photosynthetic-reaction-centers-in-rhodobacterales.php
Number of the records: 1