Short note: extracellular export and consumption of glucose in Antarctic sea ice
Extracellular carbohydrate production is widespread in sea ice microbial communities, being produced by both algae and bacteria. Under stressful conditions, including nutrient limitation and high light, cells may export excess fixed carbon as glucose. Glucose microsensors were used to measure extrac...
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2022
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ftunivtasmania:oai:eprints.utas.edu.au:45910 2023-05-15T13:43:28+02:00 Short note: extracellular export and consumption of glucose in Antarctic sea ice Kennedy, F McMinn, A Martin, A 2022 application/pdf https://eprints.utas.edu.au/45910/ https://eprints.utas.edu.au/45910/1/149426%20-%20extracellular%20export%20and%20consumption%20of%20glucose%20in%20Antarctic.pdf en eng Springer-Verlag https://eprints.utas.edu.au/45910/1/149426%20-%20extracellular%20export%20and%20consumption%20of%20glucose%20in%20Antarctic.pdf Kennedy, F orcid:0000-0003-1796-0764 , McMinn, A orcid:0000-0002-2133-3854 and Martin, A orcid:0000-0001-8260-5529 2022 , 'Short note: extracellular export and consumption of glucose in Antarctic sea ice' , Polar Biology, vol. 45 , pp. 763-768 , doi:10.1007/s00300-022-03031-6 <http://dx.doi.org/10.1007/s00300-022-03031-6>. sea ice glucose algae Antarctic Antarctic microsensor Article PeerReviewed 2022 ftunivtasmania https://doi.org/10.1007/s00300-022-03031-6 2022-05-23T22:16:40Z Extracellular carbohydrate production is widespread in sea ice microbial communities, being produced by both algae and bacteria. Under stressful conditions, including nutrient limitation and high light, cells may export excess fixed carbon as glucose. Glucose microsensors were used to measure extracellular glucose exudation and consumption in a sea ice algal community. Glucose export increased with increasing irradiance between 15 and 512 µmol photons m−2 s−1. This export correlated with declining FvFm values and increasing NPQ values, implying that glucose export resulted from exposure to above optimal irradiances. Glucose concentrations in samples treated with DCMU to block photosynthesis, declined at all irradiances. Bacterial consumption of glucose was between 6 and 34% of extracellular export per hour. There have been very few measurements of DOC/glucose in sea ice and the data presented here make an important contribution to our understanding of sea ice microbial processes. Article in Journal/Newspaper Antarc* Antarctic Polar Biology Sea ice University of Tasmania: UTas ePrints Antarctic Polar Biology 45 4 763 768 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
sea ice glucose algae Antarctic Antarctic microsensor |
spellingShingle |
sea ice glucose algae Antarctic Antarctic microsensor Kennedy, F McMinn, A Martin, A Short note: extracellular export and consumption of glucose in Antarctic sea ice |
topic_facet |
sea ice glucose algae Antarctic Antarctic microsensor |
description |
Extracellular carbohydrate production is widespread in sea ice microbial communities, being produced by both algae and bacteria. Under stressful conditions, including nutrient limitation and high light, cells may export excess fixed carbon as glucose. Glucose microsensors were used to measure extracellular glucose exudation and consumption in a sea ice algal community. Glucose export increased with increasing irradiance between 15 and 512 µmol photons m−2 s−1. This export correlated with declining FvFm values and increasing NPQ values, implying that glucose export resulted from exposure to above optimal irradiances. Glucose concentrations in samples treated with DCMU to block photosynthesis, declined at all irradiances. Bacterial consumption of glucose was between 6 and 34% of extracellular export per hour. There have been very few measurements of DOC/glucose in sea ice and the data presented here make an important contribution to our understanding of sea ice microbial processes. |
format |
Article in Journal/Newspaper |
author |
Kennedy, F McMinn, A Martin, A |
author_facet |
Kennedy, F McMinn, A Martin, A |
author_sort |
Kennedy, F |
title |
Short note: extracellular export and consumption of glucose in Antarctic sea ice |
title_short |
Short note: extracellular export and consumption of glucose in Antarctic sea ice |
title_full |
Short note: extracellular export and consumption of glucose in Antarctic sea ice |
title_fullStr |
Short note: extracellular export and consumption of glucose in Antarctic sea ice |
title_full_unstemmed |
Short note: extracellular export and consumption of glucose in Antarctic sea ice |
title_sort |
short note: extracellular export and consumption of glucose in antarctic sea ice |
publisher |
Springer-Verlag |
publishDate |
2022 |
url |
https://eprints.utas.edu.au/45910/ https://eprints.utas.edu.au/45910/1/149426%20-%20extracellular%20export%20and%20consumption%20of%20glucose%20in%20Antarctic.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Polar Biology Sea ice |
genre_facet |
Antarc* Antarctic Polar Biology Sea ice |
op_relation |
https://eprints.utas.edu.au/45910/1/149426%20-%20extracellular%20export%20and%20consumption%20of%20glucose%20in%20Antarctic.pdf Kennedy, F orcid:0000-0003-1796-0764 , McMinn, A orcid:0000-0002-2133-3854 and Martin, A orcid:0000-0001-8260-5529 2022 , 'Short note: extracellular export and consumption of glucose in Antarctic sea ice' , Polar Biology, vol. 45 , pp. 763-768 , doi:10.1007/s00300-022-03031-6 <http://dx.doi.org/10.1007/s00300-022-03031-6>. |
op_doi |
https://doi.org/10.1007/s00300-022-03031-6 |
container_title |
Polar Biology |
container_volume |
45 |
container_issue |
4 |
container_start_page |
763 |
op_container_end_page |
768 |
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1766189231773843456 |