Skip Navigation



JXB Advance Access published online on May 11, 2009
Journal of Experimental Botany, doi:10.1093/jxb/erp115
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
60/8/2315    most recent
erp115v1
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 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 arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Vrábl, D.
Right arrow Articles by Santrucek, J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Vrábl, D.
Right arrow Articles by Santrucek, J.
Agricola
Right arrow Articles by Vrábl, D.
Right arrow Articles by Santrucek, J.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author [2009]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

RESEARCH PAPER

Mesophyll conductance to CO2 transport estimated by two independent methods: effect of variable CO2 concentration and abscisic acid

D. Vrábl1,*, M. Vasková1, M. Hronková1,2, J. Flexas3 and J. Santrucek1,2

1The University of South Bohemia, Faculty of Science, Department of Plant Physiology, Branisovská 31, Ceské Budejovice, CZ-370-05, Czech Republic
2Institute of Plant Molecular Biology, Biology Centre of the Academy of Sciences of the Czech Republic, Branisovská 31, Ceské Budejovice, CZ-370-05, Czech Republic
3Research Group on ‘Plant Biology under Mediterranean Conditions’, Departament de Biologia, Universitat de les Illes Balears. Carretera de Valldemossa Km 7.5, 07122 Palma de Mallorca, Balears

* To whom correspondence should be addressed. E-mail: daniel.vrabl{at}prf.jcu.cz

Mesophyll conductance (gm) and stomatal conductance (gs) are two crucial components of the diffusive limitation of photosynthesis. Variation of gm in response to CO2 concentration was evaluated by using two independent methods based on measurements of variable electron transport rate (J) and instantaneous carbon isotope discrimination, respectively. Both methods of gm estimation showed a very similar shape of the gm/Ci relationship, with an initial increase at low substomatal CO2 concentrations (Ci), a peak at 180–200 µmol mol–1 Ci, and a subsequent decrease at higher Ci. A good correlation was observed between values of gm estimated from the two methods, except when Ci <200 µmol mol–1, suggesting that the initial increase of gm at low Ci was probably due to unreliable estimates over that range of Ci. Plants were also treated with abscisic acid (ABA), which induced a reduction in gs without significantly affecting the rate of photosynthesis, gm or the photosynthetic capacity. The present results confirm, using two independent methods, that gm is strongly sensitive to Ci, and that the relationship between gs and gm is not conservative, differing between control and ABA-treated plants.

Key words: Abscisic acid, carbon dioxide, Helianthus annuus, mesophyll conductance, photosynthesis

Received 17 February 2009; Accepted 16 March 2009


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
 Tree PhysiolHome page
B. Duan, Y. Li, X. Zhang, H. Korpelainen, and C. Li
Water deficit affects mesophyll limitation of leaves more strongly in sun than in shade in two contrasting Picea asperata populations
Tree Physiol, October 13, 2009; (2009) tpp085v1.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
T. L. Pons, J. Flexas, S. von Caemmerer, J. R. Evans, B. Genty, M. Ribas-Carbo, and E. Brugnoli
Estimating mesophyll conductance to CO2: methodology, potential errors, and recommendations
J. Exp. Bot., May 1, 2009; 60(8): 2217 - 2234.
[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.