Zoospores of Three Arctic Laminariales Under Different UV Radiation and Temperature Conditions: Exceptional Spectral Absorbance Properties and Lack of Phlorotannin Induction
Abstract Phlorotannins have often been considered to act as UV‐protective compounds in zoospores of brown algae. However, only the absorption characteristics of zoospores under UV exposure have been determined and no data are available on the actual content of phlorotannins or on temperature–UV inte...
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crwiley:10.1111/j.1751-1097.2008.00515.x 2024-04-14T08:06:54+00:00 Zoospores of Three Arctic Laminariales Under Different UV Radiation and Temperature Conditions: Exceptional Spectral Absorbance Properties and Lack of Phlorotannin Induction Müller, Ruth Wiencke, Christian Bischof, Kai Krock, Bernd 2009 http://dx.doi.org/10.1111/j.1751-1097.2008.00515.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1751-1097.2008.00515.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1751-1097.2008.00515.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Photochemistry and Photobiology volume 85, issue 4, page 970-977 ISSN 0031-8655 1751-1097 Physical and Theoretical Chemistry General Medicine Biochemistry journal-article 2009 crwiley https://doi.org/10.1111/j.1751-1097.2008.00515.x 2024-03-19T10:54:05Z Abstract Phlorotannins have often been considered to act as UV‐protective compounds in zoospores of brown algae. However, only the absorption characteristics of zoospores under UV exposure have been determined and no data are available on the actual content of phlorotannins or on temperature–UV interactions. Therefore, we determined the absorbance spectra and the phlorotannin contents in zoospore suspensions of three Arctic species ( Saccharina latissima , Laminaria digitata , Alaria esculenta ), and in the media surrounding zoospores after exposure to different radiation (400–700, 320–700, 295–700 nm) and temperature (2–18°C) conditions for 8 h. Absorption typical of phlorotannins with a maximum at 276 nm was monitored in zoospore suspensions as well as in the media surrounding zoospores, but the results depended strongly on radiation treatments and on zoospore densities. Surprisingly, the content of UV‐absorbing phlorotannins subsequent to different exposures did not change in any of the three species. The observed exceptional absorption properties could, therefore, not be related to phlorotannin contents. These findings are discussed in light of a strong phlorotannin investment from sporophytes during spore release and a minor UV‐protective role of phlorotannins for zoospores of Arctic kelp species. Article in Journal/Newspaper Arctic Wiley Online Library Arctic Photochemistry and Photobiology 85 4 970 977 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Physical and Theoretical Chemistry General Medicine Biochemistry |
spellingShingle |
Physical and Theoretical Chemistry General Medicine Biochemistry Müller, Ruth Wiencke, Christian Bischof, Kai Krock, Bernd Zoospores of Three Arctic Laminariales Under Different UV Radiation and Temperature Conditions: Exceptional Spectral Absorbance Properties and Lack of Phlorotannin Induction |
topic_facet |
Physical and Theoretical Chemistry General Medicine Biochemistry |
description |
Abstract Phlorotannins have often been considered to act as UV‐protective compounds in zoospores of brown algae. However, only the absorption characteristics of zoospores under UV exposure have been determined and no data are available on the actual content of phlorotannins or on temperature–UV interactions. Therefore, we determined the absorbance spectra and the phlorotannin contents in zoospore suspensions of three Arctic species ( Saccharina latissima , Laminaria digitata , Alaria esculenta ), and in the media surrounding zoospores after exposure to different radiation (400–700, 320–700, 295–700 nm) and temperature (2–18°C) conditions for 8 h. Absorption typical of phlorotannins with a maximum at 276 nm was monitored in zoospore suspensions as well as in the media surrounding zoospores, but the results depended strongly on radiation treatments and on zoospore densities. Surprisingly, the content of UV‐absorbing phlorotannins subsequent to different exposures did not change in any of the three species. The observed exceptional absorption properties could, therefore, not be related to phlorotannin contents. These findings are discussed in light of a strong phlorotannin investment from sporophytes during spore release and a minor UV‐protective role of phlorotannins for zoospores of Arctic kelp species. |
format |
Article in Journal/Newspaper |
author |
Müller, Ruth Wiencke, Christian Bischof, Kai Krock, Bernd |
author_facet |
Müller, Ruth Wiencke, Christian Bischof, Kai Krock, Bernd |
author_sort |
Müller, Ruth |
title |
Zoospores of Three Arctic Laminariales Under Different UV Radiation and Temperature Conditions: Exceptional Spectral Absorbance Properties and Lack of Phlorotannin Induction |
title_short |
Zoospores of Three Arctic Laminariales Under Different UV Radiation and Temperature Conditions: Exceptional Spectral Absorbance Properties and Lack of Phlorotannin Induction |
title_full |
Zoospores of Three Arctic Laminariales Under Different UV Radiation and Temperature Conditions: Exceptional Spectral Absorbance Properties and Lack of Phlorotannin Induction |
title_fullStr |
Zoospores of Three Arctic Laminariales Under Different UV Radiation and Temperature Conditions: Exceptional Spectral Absorbance Properties and Lack of Phlorotannin Induction |
title_full_unstemmed |
Zoospores of Three Arctic Laminariales Under Different UV Radiation and Temperature Conditions: Exceptional Spectral Absorbance Properties and Lack of Phlorotannin Induction |
title_sort |
zoospores of three arctic laminariales under different uv radiation and temperature conditions: exceptional spectral absorbance properties and lack of phlorotannin induction |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1751-1097.2008.00515.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1751-1097.2008.00515.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1751-1097.2008.00515.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Photochemistry and Photobiology volume 85, issue 4, page 970-977 ISSN 0031-8655 1751-1097 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1751-1097.2008.00515.x |
container_title |
Photochemistry and Photobiology |
container_volume |
85 |
container_issue |
4 |
container_start_page |
970 |
op_container_end_page |
977 |
_version_ |
1796304129495138304 |