PuSH - Publication Server of Helmholtz Zentrum München: Contrasting carbon allocation responses of juvenile European beech (<em>Fagus sylvatica</em>) and Norway spruce (<em>Picea abies</em>) to competition and ozone.

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Ritter, W.* ; Lehmeier, C.A.* ; Winkler, J.B. ; Matyssek, R.* ; Grams, T.E.E.*

Contrasting carbon allocation responses of juvenile European beech (Fagus sylvatica) and Norway spruce (Picea abies) to competition and ozone.

Environ. Pollut. 196, 534-543 (2015)

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Open Access Green as soon as Postprint is submitted to ZB.

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Allocation of recent photoassimilates of juvenile beech and spruce in response to twice-ambient ozone (2 × O₃) and plant competition (i.e. intra vs. inter-specific) was examined in a phytotron study. To this end, we employed continuous ¹³CO₂/¹²CO₂ labeling during late summer and pursued tracer kinetics in CO₂ released from stems. In beech, allocation of recent photoassimilates to stems was significantly lowered under 2 × O₃ and increased in spruce when grown in mixed culture. As total tree biomass was not yet affected by the treatments, C allocation reflected incipient tree responses providing the mechanistic basis for biomass partitioning as observed in longer experiments. Compartmental modeling characterized functional properties of substrate pools supplying respiratory C demand. Respiration of spruce appeared to be exclusively supplied by recent photoassimilates. In beech, older C, putatively located in stem parenchyma cells, was a major source of respiratory substrate, reflecting the fundamental anatomical disparity between angiosperm beech and gymnosperm spruce.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Compartmental modeling; Plant–plant competition (intra versus inter-specific); CO2 efflux; Stable carbon isotope (13CO2/12CO2) labeling; Tropospheric ozone (O3); Birch Betula-pendula; Free-air Fumigation; Stem Co2 Efflux; Climate-change; Perennial Ryegrass; Tropospheric Ozone; Foliar Injury; Gas-exchange; Forest Trees; Pine Trees

ISSN (print) / ISBN 0269-7491

e-ISSN 1873-6424

Journal Environmental Pollution

Quellenangaben Volume: 196, Pages: 534-543

Publisher Elsevier

Publishing Place Oxford

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Research Unit Environmental Simulation (EUS)