Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales
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 trans...
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ftczechacademysc:oai:kramerius.lib.cas.cz:uuid:a4068846-c2a4-4a9c-bc46-b7b1fd483769 2024-03-17T08:53:48+00:00 Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales Kaftan, D Medová, Hana, 1982- Selyanin, V Kopejtka, K Koblížek, Michal, 1972- 361-366 print počítač zdroj https://kramerius.lib.cas.cz/view/uuid:a4068846-c2a4-4a9c-bc46-b7b1fd483769 https://doi.org/10.32615/ps.2019.039 eng eng https://kramerius.lib.cas.cz/view/uuid:a4068846-c2a4-4a9c-bc46-b7b1fd483769 issn:0300-3604 doi:10.32615/ps.2019.039 policy:public fluorescence variable fluorescence aerobic anoxygenic phototrophs Rhodobaca barguzinensis Roseobacter 2 581 ftczechacademysc https://doi.org/10.32615/ps.2019.039 2024-02-19T23:06:23Z 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°C. It was found that the photosynthetic electron transport had a broad temperature optimum between 25-50°C. Moreover, the primary charge separation stayed functional even after rising temperature up to 55°C. The same phenomenon was observed also in other phototrophic Rhodobacterales. The psychrotolerant bacterium Roseisalinus antarcticus reached its maximum electron transport rate at 48°C, 30°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. D. Kaftan, H. Medová, V. Selyanin, K. Kopejtka and M. Koblížek. Obsahuje bibliografické odkazy Other/Unknown Material Antarc* antarcticus Czech Academy of Sciences: dKNAV Photosynthetica 57 2 361 366 |
institution |
Open Polar |
collection |
Czech Academy of Sciences: dKNAV |
op_collection_id |
ftczechacademysc |
language |
English |
topic |
fluorescence variable fluorescence aerobic anoxygenic phototrophs Rhodobaca barguzinensis Roseobacter 2 581 |
spellingShingle |
fluorescence variable fluorescence aerobic anoxygenic phototrophs Rhodobaca barguzinensis Roseobacter 2 581 Kaftan, D Medová, Hana, 1982- Selyanin, V Kopejtka, K Koblížek, Michal, 1972- Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales |
topic_facet |
fluorescence variable fluorescence aerobic anoxygenic phototrophs Rhodobaca barguzinensis Roseobacter 2 581 |
description |
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°C. It was found that the photosynthetic electron transport had a broad temperature optimum between 25-50°C. Moreover, the primary charge separation stayed functional even after rising temperature up to 55°C. The same phenomenon was observed also in other phototrophic Rhodobacterales. The psychrotolerant bacterium Roseisalinus antarcticus reached its maximum electron transport rate at 48°C, 30°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. D. Kaftan, H. Medová, V. Selyanin, K. Kopejtka and M. Koblížek. Obsahuje bibliografické odkazy |
author |
Kaftan, D Medová, Hana, 1982- Selyanin, V Kopejtka, K Koblížek, Michal, 1972- |
author_facet |
Kaftan, D Medová, Hana, 1982- Selyanin, V Kopejtka, K Koblížek, Michal, 1972- |
author_sort |
Kaftan, D |
title |
Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales |
title_short |
Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales |
title_full |
Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales |
title_fullStr |
Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales |
title_full_unstemmed |
Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales |
title_sort |
extended temperature optimum of photosynthetic reaction centers in rhodobacterales |
url |
https://kramerius.lib.cas.cz/view/uuid:a4068846-c2a4-4a9c-bc46-b7b1fd483769 https://doi.org/10.32615/ps.2019.039 |
op_coverage |
361-366 |
genre |
Antarc* antarcticus |
genre_facet |
Antarc* antarcticus |
op_relation |
https://kramerius.lib.cas.cz/view/uuid:a4068846-c2a4-4a9c-bc46-b7b1fd483769 issn:0300-3604 doi:10.32615/ps.2019.039 |
op_rights |
policy:public |
op_doi |
https://doi.org/10.32615/ps.2019.039 |
container_title |
Photosynthetica |
container_volume |
57 |
container_issue |
2 |
container_start_page |
361 |
op_container_end_page |
366 |
_version_ |
1793768375861641216 |