Physiological differences between the nutrient uptakes of Kjellmaniella crassifolia and Laminaria japonica (Phaeophyceae).
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- OZAKI AI
- Laboratory of Breeding Science, Graduate School of Fisheries Sciences, Hokkaido University
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- MIZUTA HIROYUKI
- Laboratory of Breeding Science, Graduate School of Fisheries Sciences, Hokkaido University
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- YAMAMOTO HIROTOSHI
- Laboratory of Breeding Science, Graduate School of Fisheries Sciences, Hokkaido University
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The nutrient uptake kinetics of Kjellmaniella crassifolia and Laminaria japonica were determined under a variety of conditions. The nitrate and phosphate uptake rates followed Michaelis-Menten kinetics toward ambient nutrient concentrations, showing no difference between the maximum uptake rates of the two species. However, half-saturations of nitrate and phosphate uptake kinetics in K. crassifolia were higher than those in L. japonica. Low water temperature (5°C) greatly restrained the nitrate and phosphate uptakes of both algae. Low irradiance (< 100 μE/m2 per s) restrained nitrate and phosphate uptakes only in L. japonica, although high irradiance (> 100 μE/m2 per s) caused no difference between the two species. The nitrate and phosphate uptake rates at low irradiance in K. crassifolia were 2-7 times higher than those in L. japonica. Light compensation and saturation irradiances in K. crassifolia were significantly lower than in L. japonica. These results indicate that K. crassifolia is able to take up carbon and nutrients at low irradiance, which suggests that the nutrient uptake characteristic of K. crassifolia could allow it to adapt to deeper habitats and even to high water turbidity.
収録刊行物
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- Fisheries science
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Fisheries science 67 (3), 415-419, 2001
公益社団法人 日本水産学会
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詳細情報
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- CRID
- 1390282679405884544
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- NII論文ID
- 30014677674
- 130003903556
- 10008269105
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- NII書誌ID
- AA10993718
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- ISSN
- 14442906
- 09199268
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- NDL書誌ID
- 5813110
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可