Skip Navigation


JXB Advance Access originally published online on January 24, 2005
Journal of Experimental Botany 2005 56(413):857-864; doi:10.1093/jxb/eri072
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
56/413/857    most recent
eri072v1
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (17)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Pieruschka, R.
Right arrow Articles by Jahnke, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Pieruschka, R.
Right arrow Articles by Jahnke, S.
Agricola
Right arrow Articles by Pieruschka, R.
Right arrow Articles by Jahnke, S.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author [2005]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

RESEARCH PAPER

Lateral gas diffusion inside leaves

Roland Pieruschka1, Ulrich Schurr1 and Siegfried Jahnke1,2,*

1Forschungszentrum Jülich GmbH, ICG III: Phytosphere, D-52425 Jülich, Germany
2FB 9–Botanik, Universität Duisburg-Essen, D-45117 Essen, Germany

* To whom correspondence should be addressed in Jülich. Fax: +49 2461 61 2492. E-mail: s.jahnke{at}fz-juelich.de

Diffusion of CO2 inside leaves is generally regarded to be from the substomatal cavities to the assimilating tissues, i.e. in the vertical direction of the leaf blades. However, lateral gas diffusion within intercellular air spaces may be much more effective than hitherto considered. In a previous work it was demonstrated that, when ‘clamp-on’ leaf chambers are used, leaf internal ‘CO2 leakage’ beyond the leaf chamber gaskets may seriously affect gas exchange measurement. This effect has been used in the present paper to quantify gas conductance (gleaf,l, mmol m–2 s–1) in the lateral directions within leaves and significant differences between homo- and heterobaric leaves were observed. For the homobaric leaves, lateral gas conductance measured over a distance of 6 or 8 mm (the widths of the chamber gaskets) was 2–20% of vertical conductance taken from published data measured over much smaller distances of 108–280 µm (the thickness of the leaves). The specific internal gas diffusion properties of the leaves have been characterized by gas conductivities ( µmol m–1 s–1). Gas conductivities in the lateral directions of heterobaric leaves were found to be small but not zero. In homobaric leaves, they were between 67 and 209 µmol m–1 s–1 and thus even larger than those in the vertical direction of the leaf blades (between 15 and 78 µmol m–1 s–1). The potential implications for experimentalists performing gas exchange measurements are discussed.

Key words: Gas conductance, gas conductivity, gas exchange measurement, heterobaric leaf anatomy, homobaric leaf anatomy, respiration


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Plant Physiol.Home page
J. I.L. Morison, T. Lawson, and G. Cornic
Lateral CO2 Diffusion inside Dicotyledonous Leaves Can Be Substantial: Quantification in Different Light Intensities
Plant Physiology, November 1, 2007; 145(3): 680 - 690.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Bot.Home page
T. Kenzo, T. Ichie, Y. Watanabe, and T. Hiromi
Ecological distribution of homobaric and heterobaric leaves in tree species of Malaysian lowland tropical rainforest
Am. J. Botany, May 1, 2007; 94(5): 764 - 775.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
J. Galmes, H. Medrano, and J. Flexas
Acclimation of Rubisco specificity factor to drought in tobacco: discrepancies between in vitro and in vivo estimations
J. Exp. Bot., November 1, 2006; 57(14): 3659 - 3667.
[Abstract] [Full Text] [PDF]

Home page
 Proc. Natl. Acad. Sci. USAHome page
P. Cloetens, R. Mache, M. Schlenker, and S. Lerbs-Mache
Quantitative phase tomography of Arabidopsis seeds reveals intercellular void network
PNAS, September 26, 2006; 103(39): 14626 - 14630.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
S. Jahnke and R. Pieruschka
Air pressure in clamp-on leaf chambers: a neglected issue in gas exchange measurements
J. Exp. Bot., August 1, 2006; 57(11): 2553 - 2561.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
J. Y. Tang, R. E. Zielinski, A. R. Zangerl, A. R. Crofts, M. R. Berenbaum, and E. H. DeLucia
The differential effects of herbivory by first and fourth instars of Trichoplusia ni (Lepidoptera: Noctuidae) on photosynthesis in Arabidopsis thaliana
J. Exp. Bot., February 1, 2006; 57(3): 527 - 536.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
J. I.L. Morison, E. Gallouet, T. Lawson, G. Cornic, R. Herbin, and N. R. Baker
Lateral Diffusion of CO2 in Leaves Is Not Sufficient to Support Photosynthesis
Plant Physiology, September 1, 2005; 139(1): 254 - 266.
[Abstract] [Full Text] [PDF]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.