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Effect of Elevated Carbon Dioxide Concentration on Carbon Assimilation under Fluctuating Light

2012; Wiley; Volume: 41; Issue: 6 Linguagem: Inglês

10.2134/jeq2012.0113

1537-2537

Petra Holišová, Martina Zitová, Karel Klem, Otmar Urban,

Atmospheric chemistry and aerosols

Journal of Environmental QualityVolume 41, Issue 6 p. 1931-1938 Plant and Environment Interaction Effect of Elevated Carbon Dioxide Concentration on Carbon Assimilation under Fluctuating Light Petra Holišová, Petra Holišová Global Change Research Centre, Academy of Sciences of the Czech Republic, Bělidla 4a, CZ-60300 Brno, Czech Republic Mendel Univ. in Brno, Dep. of Forest Ecology, Zemědělská 3, CZ-61300 Brno, Czech RepublicAssigned to Associate Editor Carlo CalfapietraSearch for more papers by this authorMartina Zitová, Martina Zitová Global Change Research Centre, Academy of Sciences of the Czech Republic, Bělidla 4a, CZ-60300 Brno, Czech RepublicSearch for more papers by this authorKarel Klem, Karel Klem Global Change Research Centre, Academy of Sciences of the Czech Republic, Bělidla 4a, CZ-60300 Brno, Czech RepublicSearch for more papers by this authorOtmar Urban, Corresponding Author Otmar Urban urban.o@czechglobe.cz Global Change Research Centre, Academy of Sciences of the Czech Republic, Bělidla 4a, CZ-60300 Brno, Czech RepublicCorresponding author (urban.o@czechglobe.cz).Search for more papers by this author Petra Holišová, Petra Holišová Global Change Research Centre, Academy of Sciences of the Czech Republic, Bělidla 4a, CZ-60300 Brno, Czech Republic Mendel Univ. in Brno, Dep. of Forest Ecology, Zemědělská 3, CZ-61300 Brno, Czech RepublicAssigned to Associate Editor Carlo CalfapietraSearch for more papers by this authorMartina Zitová, Martina Zitová Global Change Research Centre, Academy of Sciences of the Czech Republic, Bělidla 4a, CZ-60300 Brno, Czech RepublicSearch for more papers by this authorKarel Klem, Karel Klem Global Change Research Centre, Academy of Sciences of the Czech Republic, Bělidla 4a, CZ-60300 Brno, Czech RepublicSearch for more papers by this authorOtmar Urban, Corresponding Author Otmar Urban urban.o@czechglobe.cz Global Change Research Centre, Academy of Sciences of the Czech Republic, Bělidla 4a, CZ-60300 Brno, Czech RepublicCorresponding author (urban.o@czechglobe.cz).Search for more papers by this author First published: 01 November 2012 https://doi.org/10.2134/jeq2012.0113Citations: 13 All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Natural fluctuations in light intensity may significantly affect the amount of CO2 assimilated by plants and ecosystems. Little is known, however, about the interactive effect of dynamic light conditions and atmospheric CO2 concentrations. The hypothesis that elevated CO2 concentration (EC; 700 μmol CO2 mol−1) increases photosynthetic efficiency in dynamic light environments as compared to ambient CO2 concentration (AC; 385 μmol CO2 mol−1) was tested. Sun leaves of European beech (Fagus sylvatica L.) and current-year shoots of Norway spruce [Picea abies (L). Karst.] were exposed to five dynamic light regimes (LRs) occurring within forest canopies due to variable cloud cover or self-shading of leaves and to a steady-state LR. The LRs differed in the time course of incident irradiance, whereas the overall duration (600 s) and total amount of radiation (35.88 mmol photons m−2) were the same in all LRs. The EC treatment enhanced the amount of CO2 assimilated under all LRs tested. While the stimulation was only 37 to 50% in beech, it was 52 to 85% in spruce. The hypothesis that photosynthetic efficiency is stimulated by EC was confirmed in LRs when the leaves were pre-exposed to low light intensity and photosynthetic induction was required. By contrast, only a minor effect of EC treatment was found on the rate of induction loss and postillumination CO2 fixation in both species studied. Citing Literature Volume41, Issue6November 2012Pages 1931-1938 RelatedInformation