Title
Leaf temperatures in glasshouses and open-top chambers Leaf temperatures in glasshouses and open-top chambers
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Oxford ,
Subject
Biology
Source (journal)
New phytologist. - Oxford
Volume/pages
194(2012) :4 , p. 1155-1164
ISSN
0028-646X
ISI
000303435400027
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Climate manipulation experiments are of key importance in identifying possible responses of plant communities and ecosystems to climate change. Experiments for warming the air under sunlit conditions are carried out in (partial) enclosures. These inevitably alter the energy balance inside, potentially altering tissue temperatures which affect metabolism and growth. Using an empirically validated energy balance model, we investigate effects of two widely used warming methods, climate-controlled glasshouses and passively warmed open-top chambers (OTCs), on leaf temperatures. The model applies standard energy balance formulas, supplemented with data on optical properties of glasshouse materials and wind conditions inside OTCs. Results show that the different radiation environment inside glasshouses did not produce large leaf temperature deviations compared with outside. Poor glasshouse design with significant radiation blockage by the structure or with insufficient ventilation did affect tissue temperatures more significantly. The drastic wind speed reduction inside OTCs approximately doubled the actual (canopy) warming compared with earlier reported increases in air temperature provided by this technique an effect that was inflated if the plants stomates closed. These results demonstrate that leaf temperatures were higher than previously considered in OTCs but not in climate-controlled glasshouses.
E-info
https://repository.uantwerpen.be/docman/iruaauth/e608f3/49f1655.pdf
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