Differential responses of root uptake kinetics of NH4+ and NO3- to enriched atmospheric CO2 concentration in field-grown loblolly pine
In: Plant, cell and environment (Print), Jg. 19 (1996), Heft 3, S. 367-371
Online
academicJournal
- print, 26 ref
Zugriff:
The nitrogen requirement of plants is predominantly supplied by NH4+ and/or NO3- from the soil solution, but the energetic cost of uptake and assimilation is generally higher for NO3- than for NH4+. We found that CO2 enrichment of the atmosphere enhanced the root uptake capacity for NO3-, but not for NH4+, in field-grown loblolly pine saplings. Increased preference for NO3- at the elevated CO2 concentration was accompanied by increased carbohydrate levels in roots. The results have important implications for the potential consequences of global climate change on plant- and ecosystem-level processes in many temperate forest ecosystems.
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Differential responses of root uptake kinetics of NH4+ and NO3- to enriched atmospheric CO2 concentration in field-grown loblolly pine
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Autor/in / Beteiligte Person: | BASSIRIRAD, H ; THOMAS, R. B ; REYNOLDS, J. F ; STRAIN, B. R |
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Zeitschrift: | Plant, cell and environment (Print), Jg. 19 (1996), Heft 3, S. 367-371 |
Veröffentlichung: | Oxford: Blackwell, 1996 |
Medientyp: | academicJournal |
Umfang: | print, 26 ref |
ISSN: | 0140-7791 (print) |
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