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Research article - Peer-reviewed, 2020

N2O emissions from plants are reduced under photosynthetic activity

Schützenmeister, Klaus; Meurer, Katharina; Gronwald, Marco; Hartmann, Antonia B. D.; Gansert, Dirk; Jungkunst, Hermann F.


  • New plant functions in the exchange of greenhouse gases between ecosystems and atmosphere have recently been discovered. We tested whether photosynthetic activity has an effect on N2O emission rates from incubated plant–soil systems.
  • Two laboratory experiments were performed. One to unravel possible effect of photosynthetic activity on the net N2O ecosystem exchange for two species (beech and ash saplings). The other to account for possible effects from rhizosphere and aboveground plant parts separately (ash sapling only).
  • Total N2O emissions from both plant and plant–soil systems were significantly lower under light than in darkness (31%–65%). The photosynthetic effect only applied to the aboveground plant parts.
  • Underlying processes have now to be unraveled to improve our understanding of ecosystem functioning. This will improve modeling and budgeting of greenhouse gas exchanges between ecosystems and the atmosphere.

Published in

Plant-Environment Interactions
2020, volume: 1, number: 1, pages: 48-56

Authors' information

Schützenmeister, Klaus
University of Koblenz-Landau
Swedish University of Agricultural Sciences, Department of Soil and Environment
University of Koblenz-Landau
Gronwald, Marco
University of Osnabrück
Hartmann, Antonia B. D.
University of Koblenz-Landau
Gansert, Dirk
University of Göttingen
Jungkunst, Hermann F.
University of Koblenz-Landau

UKÄ Subject classification

Climate Research

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