Document Detail

Temperature responses of mesophyll conductance differ greatly between species.
MedLine Citation:
PMID:  25224884     Owner:  NLM     Status:  Publisher    
The temperature responses of mesophyll conductance (gm ) were investigated for nine species using carbon isotope techniques combining tuneable diode laser spectroscopy and gas exchange measurements. Species included the evergreen trees Eucalyptus pauciflora, Quercus engelmannii, the tropical evergreen tree Lophostemon confertus, as well as herbaceous species Nicotiana tabacum, Oryza sativa, Triticum aestivum, Gossypium hirsutum, Glycine max and Arabidopsis thaliana. Responses varied from a two to threefold increase in mesophyll conductance between 15 and 40°C observed for Nicotiana tabacum, Gossypium hirsutum, Glycine max and Eucalyptus pauciflora to almost no change in Lophostemon confertus and Triticum aestivum. To account for different temperature responses between species, we suggest that there must be variation in both the activation energy for membrane permeability and the effective pathlength for liquid phase diffusion. Stomatal conductance was relatively independent of increases in leaf temperature and concomitant increases in leaf to air vapour pressure difference. Two exceptions were Eucalyptus and Gossypium, where stomatal conductance increased with temperature up to 35°C despite increasing leaf to air vapour pressure. For a given species, temperature responses of stomatal and mesophyll conductance were independent of one another.
Susanne von Caemmerer; John R Evans
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-9-16
Journal Detail:
Title:  Plant, cell & environment     Volume:  -     ISSN:  1365-3040     ISO Abbreviation:  Plant Cell Environ.     Publication Date:  2014 Sep 
Date Detail:
Created Date:  2014-9-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9309004     Medline TA:  Plant Cell Environ     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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This article is protected by copyright. All rights reserved.
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