Article (Scientific journals)
Clear link between drought stress, photosynthesis and biogenic volatile organic compounds in Fagus sylvatica L.
Šimpraga, M.; Verbeeck, H.; Demarcke, M. et al.
2011In Atmospheric Environment, 45 (30), p. 5254-5259
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Keywords :
Biogenic volatile organic compounds; Drought stress; European beech; Photosynthesis; Radial stem growth
Abstract :
[en] Direct plant stress sensing is the key for a quantitative understanding of drought stress effects on biogenic volatile organic compound (BVOC) emissions. A given level of drought stress might have a fundamentally different effect on the BVOC emissions of different plants. For the first time, we continuously quantified the level of drought stress in a young potted beech (Fagus sylvatica L.) with a linear variable displacement transducer (LVDT) installed at stem level in combination with simultaneous measurements of BVOC emissions and photosynthesis rates at leaf level. This continuous set of measurements allowed us to examine how beech alters its pattern of photosynthesis and carbon allocation to BVOC emissions (mainly monoterpenes, MTs) and radial stem growth during the development of drought stress. We observed an increasing-decreasing trend in the MT emissions as well as in the fraction of assimilated carbon re-emitted back into the atmosphere (ranging between 0.14 and 0.01%). We were able to link these dynamics to pronounced changes in radial stem growth, which served as a direct plant stress indicator. Interestingly, we detected a sudden burst in emission of a non-identified, non-MT BVOC species when drought stress was acute (i.e. pronounced negative stem growth). This burst might have been caused by a certain stress-related green leaf volatile, which disappeared immediately upon re-watering and thus the alleviation of drought stress. These results highlight that direct plant stress sensing creates opportunities to understand the overall complexity of stress-related BVOC emissions.
Disciplines :
Physics
Author, co-author :
Šimpraga, M.;  Ghent University, Faculty of Bioscience Engineering, Ghent, Belgium > Department of Applied Ecology and Environmental Biology > Laboratory of Plant Ecology
Verbeeck, H.;  Ghent University, Faculty of Bioscience Engineering, Ghent, Belgium > Department of Applied Ecology and Environmental Biology > Laboratory of Plant Ecology
Demarcke, M.;  Belgian Institute for Space Aeronomy, Brussels, Belgium
Joó, T.;  Ghent University, Faculty of Bioscience Engineering, Ghent, Belgium > Research Group Environmental Organic Chemistry and Technology
Pokorska, O.;  Ghent University, Faculty of Bioscience Engineering, Ghent, Belgium > Research Group Environmental Organic Chemistry and Technology
Amelynck, C.;  Belgian Institute for Space Aeronomy, Brussels, Belgium
Schoon, N.;  Belgian Institute for Space Aeronomy, Brussels, Belgium
Dewulf, J.;  Ghent University, Faculty of Bioscience Engineering, Ghent, Belgium > Research Group Environmental Organic Chemistry and Technology
van Langenhove, H.;  Ghent University, Faculty of Bioscience Engineering, Ghent, Belgium > Research Group Environmental Organic Chemistry and Technology
Heinesch, Bernard  ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Physique des bio-systèmes
Aubinet, Marc ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Physique des bio-systèmes
Laffineur, Quentin ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Physique des bio-systèmes
Müller, J.-F.;  Belgian Institute for Space Aeronomy, Brussels, Belgium
Steppe, K.;  Ghent University, Faculty of Bioscience Engineering, Ghent, Belgium > Department of Applied Ecology and Environmental Biology > Laboratory of Plant Ecology
More authors (4 more) Less
Language :
English
Title :
Clear link between drought stress, photosynthesis and biogenic volatile organic compounds in Fagus sylvatica L.
Publication date :
September 2011
Journal title :
Atmospheric Environment
ISSN :
1352-2310
eISSN :
1873-2844
Publisher :
Pergamon Press - An Imprint of Elsevier Science
Volume :
45
Issue :
30
Pages :
5254-5259
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 February 2013

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