Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent
Proteorhodopsins (PRs) are commonly found in marine prokaryotes and allow microbes to use light as an energy source. In recent studies it was reported that PR stimulates growth and survival under nutrient-limited conditions. In this study we tested the effect of nutrient and salinity stress on the e...
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ftunivtasecite:oai:ecite.utas.edu.au:85206 2023-05-15T18:17:15+02:00 Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent Feng, S Powell, S Wilson, RR Bowman, JP 2013 http://ecite.utas.edu.au/85206 en eng SSA Feng, S and Powell, S and Wilson, RR and Bowman, JP, Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent, Strategic Science in Antarctica 2013 Conference, 24-28 June 2013, Hobart, Australia (2013) [Conference Extract] http://ecite.utas.edu.au/85206 Biological Sciences Microbiology Microbiology not elsewhere classified Conference Extract NonPeerReviewed 2013 ftunivtasecite 2019-12-13T21:49:30Z Proteorhodopsins (PRs) are commonly found in marine prokaryotes and allow microbes to use light as an energy source. In recent studies it was reported that PR stimulates growth and survival under nutrient-limited conditions. In this study we tested the effect of nutrient and salinity stress on the extremely psychrophilic sea-ice bacterial species Psychroflexus torquis , which possesses PR. We demonstrated for the first time that light stimulated growth occurs under conditions of salinity stress rather than nutrient limitation and that elevated salinity is related to increased growth yields, PR levels and associated proton pumping activity. PR abundance in P. torquis also is post-transcriptionally regulated by both light and salinity and thus could represent an adaptation to its sea-ice habitat. Our findings extend the existing paradigm that light provides an energy source for marine prokaryotes under stress conditions other than nutrient limitation. Conference Object Sea ice eCite UTAS (University of Tasmania) |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
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English |
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Biological Sciences Microbiology Microbiology not elsewhere classified |
spellingShingle |
Biological Sciences Microbiology Microbiology not elsewhere classified Feng, S Powell, S Wilson, RR Bowman, JP Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent |
topic_facet |
Biological Sciences Microbiology Microbiology not elsewhere classified |
description |
Proteorhodopsins (PRs) are commonly found in marine prokaryotes and allow microbes to use light as an energy source. In recent studies it was reported that PR stimulates growth and survival under nutrient-limited conditions. In this study we tested the effect of nutrient and salinity stress on the extremely psychrophilic sea-ice bacterial species Psychroflexus torquis , which possesses PR. We demonstrated for the first time that light stimulated growth occurs under conditions of salinity stress rather than nutrient limitation and that elevated salinity is related to increased growth yields, PR levels and associated proton pumping activity. PR abundance in P. torquis also is post-transcriptionally regulated by both light and salinity and thus could represent an adaptation to its sea-ice habitat. Our findings extend the existing paradigm that light provides an energy source for marine prokaryotes under stress conditions other than nutrient limitation. |
format |
Conference Object |
author |
Feng, S Powell, S Wilson, RR Bowman, JP |
author_facet |
Feng, S Powell, S Wilson, RR Bowman, JP |
author_sort |
Feng, S |
title |
Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent |
title_short |
Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent |
title_full |
Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent |
title_fullStr |
Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent |
title_full_unstemmed |
Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent |
title_sort |
light stimulated growth of proteorhodopsin bearing sea-ice psychrophile psychroflexus torquis is salinity-dependent |
publisher |
SSA |
publishDate |
2013 |
url |
http://ecite.utas.edu.au/85206 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
Feng, S and Powell, S and Wilson, RR and Bowman, JP, Light stimulated growth of proteorhodopsin bearing sea-ice psychrophile Psychroflexus torquis is salinity-dependent, Strategic Science in Antarctica 2013 Conference, 24-28 June 2013, Hobart, Australia (2013) [Conference Extract] http://ecite.utas.edu.au/85206 |
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1766191353842106368 |