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Effect of elevated CO2 on the stomatal distribution and leaf physiology of Alnus glutinosa

Published online by Cambridge University Press:  01 March 2000

I. POOLE ,
T. LAWSON ,
J. D. B. WEYERS  and
J. A. RAVEN
I. POOLE
Affiliation:
Department of Biological Sciences, University of Dundee, Dundee DD1 4HN, UK Present address: School of Earth Sciences, University of Leeds, Leeds LS2 9JT, UK.
T. LAWSON
Affiliation:
Department of Biological Sciences, University of Dundee, Dundee DD1 4HN, UK Present address: Department of Biology, John Tabor Laboratories, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK (tel +44 1206 873306; fax +44 1206 873416; e-mail [email protected]).
J. D. B. WEYERS
Affiliation:
Department of Biological Sciences, University of Dundee, Dundee DD1 4HN, UK
J. A. RAVEN
Affiliation:
Department of Biological Sciences, University of Dundee, Dundee DD1 4HN, UK
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Abstract

Variation in stomatal development and physiology of mature leaves from Alnus glutinosa plants grown under reference (current ambient, 360 μmol mol−1 CO2) and double ambient (720 μmol mol−1 CO2) carbon dioxide (CO2) mole fractions is assessed in terms of relative plant growth, stomatal characters (i.e. stomatal index and density) and leaf photosynthetic characters. This is the first study to consider the effects of elevated CO2 concentration on the distribution of stomata and epidermal cells across the whole leaf and to try to ascertain the cause of intraleaf variation. In general, a doubling of the atmospheric CO2 concentration enhanced plant growth and significantly increased stomatal index. However, there was no significant change in relative stomatal density. Under elevated CO2 concentration there was a significant decrease in stomatal conductance and an increase in assimilation rate. However, no significant differences were found for the maximum rate of carboxylation (Vcmax) and the light saturated rate of electron transport (Jmax) between the control and elevated CO2 treatment.

Keywords

Alnusstomatal indexstomatal densitycarbon dioxideconductancephotosynthesisvariation
Type
Research Article
Information
The New Phytologist , Volume 145 , Issue 3 , March 2000 , pp. 511 - 521
Copyright
© Trustees of the New Phytologist 2000

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