Biosynthesis and photosynthate allocation patterns of arctic ice algae
Biochemical composition of the sea ice microbial community was measured in populations of different light histories in the Canadian Arctic (Resolute, N.W.T.). The average composition of the particulate organic matter [soluble and insoluble polysaccharide, particulate protein, intracellular free amin...
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Language: | English |
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crwiley:10.4319/lo.1989.34.3.0591 2024-09-15T18:11:19+00:00 Biosynthesis and photosynthate allocation patterns of arctic ice algae Smith, Ralph E. H. Clement, Pierre Head, Erica 1989 http://dx.doi.org/10.4319/lo.1989.34.3.0591 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1989.34.3.0591 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1989.34.3.0591 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 34, issue 3, page 591-605 ISSN 0024-3590 1939-5590 journal-article 1989 crwiley https://doi.org/10.4319/lo.1989.34.3.0591 2024-07-25T04:19:24Z Biochemical composition of the sea ice microbial community was measured in populations of different light histories in the Canadian Arctic (Resolute, N.W.T.). The average composition of the particulate organic matter [soluble and insoluble polysaccharide, particulate protein, intracellular free amino acids (IFAA), lipid, and chlorophyll a] was within the published range for microalgae, but lipid was a relatively large (31–59%) and protein a small (20–24%) part of the total. Protein and IFAA pools apparently comprised about 50% of the particulate organic nitrogen, of which 6–10% was in the IFAA pool. Over the entire spring growth season, the net synthesis of protein, IFAA, and Chl a (relative to total cell carbon) decreased with increasing light while relative synthesis of lipid and soluble polysaccharide increased, consistent with patterns of short‐term photosynthate allocation. In the early growth season patterns of synthesis were relatively insensitive to light, and rates of lipid synthesis were large for all light histories. Photosynthate allocation in 24‐h incubations greatly underestimated actual rates of net lipid synthesis and probably overestimated protein synthesis. Microalgae of cold, low‐light environments can display rates of lipid synthesis much larger than rates normally encountered in microalgae without displaying a corresponding pattern of shorter term photosynthate allocation. Article in Journal/Newspaper ice algae Sea ice Wiley Online Library Limnology and Oceanography 34 3 591 605 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Biochemical composition of the sea ice microbial community was measured in populations of different light histories in the Canadian Arctic (Resolute, N.W.T.). The average composition of the particulate organic matter [soluble and insoluble polysaccharide, particulate protein, intracellular free amino acids (IFAA), lipid, and chlorophyll a] was within the published range for microalgae, but lipid was a relatively large (31–59%) and protein a small (20–24%) part of the total. Protein and IFAA pools apparently comprised about 50% of the particulate organic nitrogen, of which 6–10% was in the IFAA pool. Over the entire spring growth season, the net synthesis of protein, IFAA, and Chl a (relative to total cell carbon) decreased with increasing light while relative synthesis of lipid and soluble polysaccharide increased, consistent with patterns of short‐term photosynthate allocation. In the early growth season patterns of synthesis were relatively insensitive to light, and rates of lipid synthesis were large for all light histories. Photosynthate allocation in 24‐h incubations greatly underestimated actual rates of net lipid synthesis and probably overestimated protein synthesis. Microalgae of cold, low‐light environments can display rates of lipid synthesis much larger than rates normally encountered in microalgae without displaying a corresponding pattern of shorter term photosynthate allocation. |
format |
Article in Journal/Newspaper |
author |
Smith, Ralph E. H. Clement, Pierre Head, Erica |
spellingShingle |
Smith, Ralph E. H. Clement, Pierre Head, Erica Biosynthesis and photosynthate allocation patterns of arctic ice algae |
author_facet |
Smith, Ralph E. H. Clement, Pierre Head, Erica |
author_sort |
Smith, Ralph E. H. |
title |
Biosynthesis and photosynthate allocation patterns of arctic ice algae |
title_short |
Biosynthesis and photosynthate allocation patterns of arctic ice algae |
title_full |
Biosynthesis and photosynthate allocation patterns of arctic ice algae |
title_fullStr |
Biosynthesis and photosynthate allocation patterns of arctic ice algae |
title_full_unstemmed |
Biosynthesis and photosynthate allocation patterns of arctic ice algae |
title_sort |
biosynthesis and photosynthate allocation patterns of arctic ice algae |
publisher |
Wiley |
publishDate |
1989 |
url |
http://dx.doi.org/10.4319/lo.1989.34.3.0591 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1989.34.3.0591 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1989.34.3.0591 |
genre |
ice algae Sea ice |
genre_facet |
ice algae Sea ice |
op_source |
Limnology and Oceanography volume 34, issue 3, page 591-605 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1989.34.3.0591 |
container_title |
Limnology and Oceanography |
container_volume |
34 |
container_issue |
3 |
container_start_page |
591 |
op_container_end_page |
605 |
_version_ |
1810448907443896320 |