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|a (DE-627)JST105180963
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|a (JST)newphytologist.198.4.1135
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|a DE-627
|b ger
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|a en
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|a Photosynthetic performance of submerged macrophytes from lowland stream and lake habitats with contrasting CO2 availability
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|c 2013
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|a Text
|b txt
|2 rdacontent
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|a Computermedien
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|a Summary We examine the photosynthetic response of submerged plants from streams and lakes with contrasting free-CO2 and nitrogen (N) availability. We hypothesized that: the photosynthetic capacity of stream plants is higher because of higher N availability; the photosynthetic N-use efficiency (PNUE) is also higher because stream plants are acclimated to higher free-CO2; and PNUE is lower in aquatic compared to terrestrial plants. We tested these hypotheses by measuring tissue-N, photosynthetic capacity and inorganic C extraction capacity in plants collected from streams and lakes and by comparing the PNUE of aquatic plants with previously published PNUE of terrestrial plants. We found that the organic N content was consistently higher in stream (3.8–6.3% w/w) than in lake plants (1.2–4.3% w/w). The photosynthetic capacity correlated positively with tissue-N. The relationships were similar for stream and lake plants, indicating that N allocation patterns were similar despite variability in free-CO2 between the two habitats. The slope of the relationship between photosynthetic capacity and tissue-N was lower than found for terrestrial plants, whereas the compensatory N content for photosynthesis was similar. This suggests that PNUE is lower in aquatic plants, perhaps reflecting that the selection pressure for a high C fixation rate per unit N is reduced as a result of low inorganic C availability in the aquatic environment.
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|a © 2013 New Phytologist Trust
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|a acclimation
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|a aquatic plant
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|a carbon
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|a freshwater
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|a lowland
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|a photosynthetic nitrogen-use efficiency (PNUE)
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|a tissue-N
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|a Physical sciences
|x Earth sciences
|x Hydrology
|x Limnology
|x Surface water
|x Streams
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|a Biological sciences
|x Biology
|x Botany
|x Plants
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|a Biological sciences
|x Biochemistry
|x Metabolism
|x Autotrophic processes
|x Photosynthesis
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|a Physical sciences
|x Chemistry
|x Chemical compounds
|x Carbon compounds
|x Carbon dioxide
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|a Biological sciences
|x Biology
|x Botany
|x Marine botany
|x Aquatic plants
|x Macrophytes
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|a Biological sciences
|x Biology
|x Botany
|x Plant physiology
|x Plant growth
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|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Topography
|x Lowlands
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|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Bodies of water
|x Lakes
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|a Physical sciences
|x Chemistry
|x Chemical properties
|x Alkalinity
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|a Biological sciences
|x Ecology
|x Population ecology
|x Synecology
|x Habitats
|x Aquatic habitats
|x Stream habitats
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|a Physical sciences
|x Earth sciences
|x Hydrology
|x Limnology
|x Surface water
|x Streams
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|
4 |
|a Biological sciences
|x Biology
|x Botany
|x Plants
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650 |
|
4 |
|a Biological sciences
|x Biochemistry
|x Metabolism
|x Autotrophic processes
|x Photosynthesis
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650 |
|
4 |
|a Physical sciences
|x Chemistry
|x Chemical compounds
|x Carbon compounds
|x Carbon dioxide
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650 |
|
4 |
|a Biological sciences
|x Biology
|x Botany
|x Marine botany
|x Aquatic plants
|x Macrophytes
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650 |
|
4 |
|a Biological sciences
|x Biology
|x Botany
|x Plant physiology
|x Plant growth
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650 |
|
4 |
|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Topography
|x Lowlands
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|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Bodies of water
|x Lakes
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650 |
|
4 |
|a Physical sciences
|x Chemistry
|x Chemical properties
|x Alkalinity
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650 |
|
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|a Biological sciences
|x Ecology
|x Population ecology
|x Synecology
|x Habitats
|x Aquatic habitats
|x Stream habitats
|x Research
|x Full papers
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|a research-article
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|i Enthalten in
|t New Phytologist
|d New Phytologist Trust
|g 198(2013), 4, Seite 1135-1142
|w (DE-627)268132674
|w (DE-600)1472194-6
|x 14698137
|7 nnns
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|g volume:198
|g year:2013
|g number:4
|g pages:1135-1142
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|u https://www.jstor.org/stable/newphytologist.198.4.1135
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|d 198
|j 2013
|e 4
|h 1135-1142
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