Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L.
| ISSN: |
1365-3040
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|---|---|
| Source: |
Blackwell Publishing Journal Backfiles 1879-2005
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| Topics: |
Biology
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| Notes: |
The objective of this investigation was to examine the effect of an elevated atmospheric CO2 partial pressure (pCO2) on the N-sink strength and performance of symbiotic N2 fixation in Trifolium repens L. cv. Milkanova. After initial growth under ambient pCO2 in a nitrogen-free nutrient solution, T. repens in the exponential growth stage was exposed to ambient and elevated pCO2 (35 and 60 Pa) and two levels of mineral N (N-free and 7·5 mol m–3 N) for 36 d in single pots filled with silica sand in growth chambers. Elevated pCO2 evoked a significant increase in biomass production from day 12 after the start of CO2 enrichment. For plants supplied with 7·5 mol m–3 N, the relative contribution of symbiotically fixed N (%Nsym) as opposed to N assimilated from mineral sources (15N-isotope-dilution method), dropped to 40%. However, in the presence of this high level of mineral N, %Nsym was unaffected by atmospheric pCO2 over the entire experimental period. In plants fully dependent on N2 fixation, the increase in N yield reflects a stimulation of symbiotic N2 fixation that was the result of the formation of more nodules rather than of higher specific N2 fixation. These results are discussed with regard to physiological processes governing symbiotic N2 fixation and to the response of symbiotic N2 fixation to elevated pCO2 in field-grown T. repens.
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| Type of Medium: |
Electronic Resource
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| URL: |
| _version_ | 1798290228697366528 |
|---|---|
| autor | Zanetti, S. Hartwig, U.A. Nösberger, J. |
| book_url | http://dx.doi.org/10.1046/j.1365-3040.1998.00307.x |
| datenlieferant | nat_lic_papers |
| hauptsatz | hsatz_simple |
| identnr | NLZ243847173 |
| insertion_date | 2012-04-27 |
| issn | 1365-3040 |
| journal_name | Plant, cell & environment |
| materialart | 1 |
| notes | The objective of this investigation was to examine the effect of an elevated atmospheric CO2 partial pressure (pCO2) on the N-sink strength and performance of symbiotic N2 fixation in Trifolium repens L. cv. Milkanova. After initial growth under ambient pCO2 in a nitrogen-free nutrient solution, T. repens in the exponential growth stage was exposed to ambient and elevated pCO2 (35 and 60 Pa) and two levels of mineral N (N-free and 7·5 mol m–3 N) for 36 d in single pots filled with silica sand in growth chambers. Elevated pCO2 evoked a significant increase in biomass production from day 12 after the start of CO2 enrichment. For plants supplied with 7·5 mol m–3 N, the relative contribution of symbiotically fixed N (%Nsym) as opposed to N assimilated from mineral sources (15N-isotope-dilution method), dropped to 40%. However, in the presence of this high level of mineral N, %Nsym was unaffected by atmospheric pCO2 over the entire experimental period. In plants fully dependent on N2 fixation, the increase in N yield reflects a stimulation of symbiotic N2 fixation that was the result of the formation of more nodules rather than of higher specific N2 fixation. These results are discussed with regard to physiological processes governing symbiotic N2 fixation and to the response of symbiotic N2 fixation to elevated pCO2 in field-grown T. repens. |
| package_name | Blackwell Publishing |
| publikationsjahr_anzeige | 1998 |
| publikationsjahr_facette | 1998 |
| publikationsjahr_intervall | 8004:1995-1999 |
| publikationsjahr_sort | 1998 |
| publikationsort | Oxford, UK |
| publisher | Blackwell Science Ltd, UK |
| reference | 21 (1998), S. 0 |
| search_space | articles |
| shingle_author_1 | Zanetti, S. Hartwig, U.A. Nösberger, J. |
| shingle_author_2 | Zanetti, S. Hartwig, U.A. Nösberger, J. |
| shingle_author_3 | Zanetti, S. Hartwig, U.A. Nösberger, J. |
| shingle_author_4 | Zanetti, S. Hartwig, U.A. Nösberger, J. |
| shingle_catch_all_1 | Zanetti, S. Hartwig, U.A. Nösberger, J. Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. Blackwell Science Ltd, UK The objective of this investigation was to examine the effect of an elevated atmospheric CO2 partial pressure (pCO2) on the N-sink strength and performance of symbiotic N2 fixation in Trifolium repens L. cv. Milkanova. After initial growth under ambient pCO2 in a nitrogen-free nutrient solution, T. repens in the exponential growth stage was exposed to ambient and elevated pCO2 (35 and 60 Pa) and two levels of mineral N (N-free and 7·5 mol m–3 N) for 36 d in single pots filled with silica sand in growth chambers. Elevated pCO2 evoked a significant increase in biomass production from day 12 after the start of CO2 enrichment. For plants supplied with 7·5 mol m–3 N, the relative contribution of symbiotically fixed N (%Nsym) as opposed to N assimilated from mineral sources (15N-isotope-dilution method), dropped to 40%. However, in the presence of this high level of mineral N, %Nsym was unaffected by atmospheric pCO2 over the entire experimental period. In plants fully dependent on N2 fixation, the increase in N yield reflects a stimulation of symbiotic N2 fixation that was the result of the formation of more nodules rather than of higher specific N2 fixation. These results are discussed with regard to physiological processes governing symbiotic N2 fixation and to the response of symbiotic N2 fixation to elevated pCO2 in field-grown T. repens. 1365-3040 13653040 |
| shingle_catch_all_2 | Zanetti, S. Hartwig, U.A. Nösberger, J. Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. Blackwell Science Ltd, UK The objective of this investigation was to examine the effect of an elevated atmospheric CO2 partial pressure (pCO2) on the N-sink strength and performance of symbiotic N2 fixation in Trifolium repens L. cv. Milkanova. After initial growth under ambient pCO2 in a nitrogen-free nutrient solution, T. repens in the exponential growth stage was exposed to ambient and elevated pCO2 (35 and 60 Pa) and two levels of mineral N (N-free and 7·5 mol m–3 N) for 36 d in single pots filled with silica sand in growth chambers. Elevated pCO2 evoked a significant increase in biomass production from day 12 after the start of CO2 enrichment. For plants supplied with 7·5 mol m–3 N, the relative contribution of symbiotically fixed N (%Nsym) as opposed to N assimilated from mineral sources (15N-isotope-dilution method), dropped to 40%. However, in the presence of this high level of mineral N, %Nsym was unaffected by atmospheric pCO2 over the entire experimental period. In plants fully dependent on N2 fixation, the increase in N yield reflects a stimulation of symbiotic N2 fixation that was the result of the formation of more nodules rather than of higher specific N2 fixation. These results are discussed with regard to physiological processes governing symbiotic N2 fixation and to the response of symbiotic N2 fixation to elevated pCO2 in field-grown T. repens. 1365-3040 13653040 |
| shingle_catch_all_3 | Zanetti, S. Hartwig, U.A. Nösberger, J. Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. Blackwell Science Ltd, UK The objective of this investigation was to examine the effect of an elevated atmospheric CO2 partial pressure (pCO2) on the N-sink strength and performance of symbiotic N2 fixation in Trifolium repens L. cv. Milkanova. After initial growth under ambient pCO2 in a nitrogen-free nutrient solution, T. repens in the exponential growth stage was exposed to ambient and elevated pCO2 (35 and 60 Pa) and two levels of mineral N (N-free and 7·5 mol m–3 N) for 36 d in single pots filled with silica sand in growth chambers. Elevated pCO2 evoked a significant increase in biomass production from day 12 after the start of CO2 enrichment. For plants supplied with 7·5 mol m–3 N, the relative contribution of symbiotically fixed N (%Nsym) as opposed to N assimilated from mineral sources (15N-isotope-dilution method), dropped to 40%. However, in the presence of this high level of mineral N, %Nsym was unaffected by atmospheric pCO2 over the entire experimental period. In plants fully dependent on N2 fixation, the increase in N yield reflects a stimulation of symbiotic N2 fixation that was the result of the formation of more nodules rather than of higher specific N2 fixation. These results are discussed with regard to physiological processes governing symbiotic N2 fixation and to the response of symbiotic N2 fixation to elevated pCO2 in field-grown T. repens. 1365-3040 13653040 |
| shingle_catch_all_4 | Zanetti, S. Hartwig, U.A. Nösberger, J. Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. Blackwell Science Ltd, UK The objective of this investigation was to examine the effect of an elevated atmospheric CO2 partial pressure (pCO2) on the N-sink strength and performance of symbiotic N2 fixation in Trifolium repens L. cv. Milkanova. After initial growth under ambient pCO2 in a nitrogen-free nutrient solution, T. repens in the exponential growth stage was exposed to ambient and elevated pCO2 (35 and 60 Pa) and two levels of mineral N (N-free and 7·5 mol m–3 N) for 36 d in single pots filled with silica sand in growth chambers. Elevated pCO2 evoked a significant increase in biomass production from day 12 after the start of CO2 enrichment. For plants supplied with 7·5 mol m–3 N, the relative contribution of symbiotically fixed N (%Nsym) as opposed to N assimilated from mineral sources (15N-isotope-dilution method), dropped to 40%. However, in the presence of this high level of mineral N, %Nsym was unaffected by atmospheric pCO2 over the entire experimental period. In plants fully dependent on N2 fixation, the increase in N yield reflects a stimulation of symbiotic N2 fixation that was the result of the formation of more nodules rather than of higher specific N2 fixation. These results are discussed with regard to physiological processes governing symbiotic N2 fixation and to the response of symbiotic N2 fixation to elevated pCO2 in field-grown T. repens. 1365-3040 13653040 |
| shingle_title_1 | Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. |
| shingle_title_2 | Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. |
| shingle_title_3 | Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. |
| shingle_title_4 | Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. |
| sigel_instance_filter | dkfz geomar wilbert ipn albert |
| source_archive | Blackwell Publishing Journal Backfiles 1879-2005 |
| timestamp | 2024-05-06T08:13:22.385Z |
| titel | Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. |
| titel_suche | Elevated atmospheric CO2 does not affect per se the preference for symbiotic nitrogen as opposed to mineral nitrogen of Trifolium repens L. |
| topic | W |
| uid | nat_lic_papers_NLZ243847173 |