Effects of nitrogen supply and continuous darkness on growth and photosynthesis of the arctic kelp Laminaria solidungula
Sporophytes of the arctic kelp Laminaria solidungula were collected from the Beaufort Sea and kept for 7 months at 0±1.5°C in a factorial experiment under two light (continuous darkness or 25 µ mol photons m −2 s −1 on a 12: 12 L/D cycle) and two nutrient regimes (with or without added nitrate). We...
Published in: | Limnology and Oceanography |
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Online Access: | http://dx.doi.org/10.4319/lo.1997.42.2.0209 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1997.42.2.0209 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1997.42.2.0209 |
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crwiley:10.4319/lo.1997.42.2.0209 2023-12-03T10:17:30+01:00 Effects of nitrogen supply and continuous darkness on growth and photosynthesis of the arctic kelp Laminaria solidungula Henley, William J. Dunton, Kenneth H. 1997 http://dx.doi.org/10.4319/lo.1997.42.2.0209 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1997.42.2.0209 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1997.42.2.0209 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 42, issue 2, page 209-216 ISSN 0024-3590 1939-5590 Aquatic Science Oceanography journal-article 1997 crwiley https://doi.org/10.4319/lo.1997.42.2.0209 2023-11-09T14:06:03Z Sporophytes of the arctic kelp Laminaria solidungula were collected from the Beaufort Sea and kept for 7 months at 0±1.5°C in a factorial experiment under two light (continuous darkness or 25 µ mol photons m −2 s −1 on a 12: 12 L/D cycle) and two nutrient regimes (with or without added nitrate). We monitored growth rate and at the end of the experiment measured the following on both new and old blades: carbon and nitrogen content, chlorophyll and carotenoids, photosynthetic light‐response ( P vs. I ) curves, and photosynthetic unit size (Chl/P 700 ). New blade initiation was independent of light and external nitrate, but blades grew minimally in darkness. Both new (B1) and old (B2) blades of plants held in darkness (with or without added nitrate) had the same quantum yield ( ϕ m ) and area‐normalized photosynthetic capacity ( P m ), but a slightly lower respiration ( R d ) and compensation irradiance ≤ 1.5 µ mol photons m −2 s −1 ) as B2 of plants grown in the light with added nitrate. Nitrogen starvation in the light, but not in darkness, caused reduced pigments, Pm , and ϕ m , and increased I c . Tissue C and N were primarily affected by light, whereas pigments were more strongly affected by N and lightXN interaction. Based on these results, previous results for field‐collected plants, and continuous in situ light data, we conclude that total annual growth in this population is severely light‐limited, with N having an important but secondary role. Article in Journal/Newspaper Arctic Beaufort Sea Wiley Online Library (via Crossref) Arctic Limnology and Oceanography 42 2 209 216 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Oceanography |
spellingShingle |
Aquatic Science Oceanography Henley, William J. Dunton, Kenneth H. Effects of nitrogen supply and continuous darkness on growth and photosynthesis of the arctic kelp Laminaria solidungula |
topic_facet |
Aquatic Science Oceanography |
description |
Sporophytes of the arctic kelp Laminaria solidungula were collected from the Beaufort Sea and kept for 7 months at 0±1.5°C in a factorial experiment under two light (continuous darkness or 25 µ mol photons m −2 s −1 on a 12: 12 L/D cycle) and two nutrient regimes (with or without added nitrate). We monitored growth rate and at the end of the experiment measured the following on both new and old blades: carbon and nitrogen content, chlorophyll and carotenoids, photosynthetic light‐response ( P vs. I ) curves, and photosynthetic unit size (Chl/P 700 ). New blade initiation was independent of light and external nitrate, but blades grew minimally in darkness. Both new (B1) and old (B2) blades of plants held in darkness (with or without added nitrate) had the same quantum yield ( ϕ m ) and area‐normalized photosynthetic capacity ( P m ), but a slightly lower respiration ( R d ) and compensation irradiance ≤ 1.5 µ mol photons m −2 s −1 ) as B2 of plants grown in the light with added nitrate. Nitrogen starvation in the light, but not in darkness, caused reduced pigments, Pm , and ϕ m , and increased I c . Tissue C and N were primarily affected by light, whereas pigments were more strongly affected by N and lightXN interaction. Based on these results, previous results for field‐collected plants, and continuous in situ light data, we conclude that total annual growth in this population is severely light‐limited, with N having an important but secondary role. |
format |
Article in Journal/Newspaper |
author |
Henley, William J. Dunton, Kenneth H. |
author_facet |
Henley, William J. Dunton, Kenneth H. |
author_sort |
Henley, William J. |
title |
Effects of nitrogen supply and continuous darkness on growth and photosynthesis of the arctic kelp Laminaria solidungula |
title_short |
Effects of nitrogen supply and continuous darkness on growth and photosynthesis of the arctic kelp Laminaria solidungula |
title_full |
Effects of nitrogen supply and continuous darkness on growth and photosynthesis of the arctic kelp Laminaria solidungula |
title_fullStr |
Effects of nitrogen supply and continuous darkness on growth and photosynthesis of the arctic kelp Laminaria solidungula |
title_full_unstemmed |
Effects of nitrogen supply and continuous darkness on growth and photosynthesis of the arctic kelp Laminaria solidungula |
title_sort |
effects of nitrogen supply and continuous darkness on growth and photosynthesis of the arctic kelp laminaria solidungula |
publisher |
Wiley |
publishDate |
1997 |
url |
http://dx.doi.org/10.4319/lo.1997.42.2.0209 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1997.42.2.0209 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1997.42.2.0209 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beaufort Sea |
genre_facet |
Arctic Beaufort Sea |
op_source |
Limnology and Oceanography volume 42, issue 2, page 209-216 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1997.42.2.0209 |
container_title |
Limnology and Oceanography |
container_volume |
42 |
container_issue |
2 |
container_start_page |
209 |
op_container_end_page |
216 |
_version_ |
1784264454509166592 |