Effects of elevated carbon dioxide and sucrose concentrations onArabidopsis thalianaroot architecture and anatomy

Elaine Lee-Ho; Linda J. Walton; David M. Reid; Edward C. Yeung; Leonid V. Kurepin

doi:10.1139/b07-009

journal article Mar 01, 2007

Effects of elevated carbon dioxide and sucrose concentrations onArabidopsis thalianaroot architecture and anatomy

Elaine Lee-Ho Linda J. Walton David M. Reid Edward C. Yeung Leonid V. Kurepin

Canadian Journal of Botany Vol. 85 No. 3 pp. 324-330 · Canadian Science Publishing

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Abstract

The objective of this study was to evaluate the effects of elevated carbon dioxide and sucrose concentrations on Arabidopsis thaliana L. Heynh root growth, morphology, and architecture. Two levels of CO2, 360 (ambient) and 900 (elevated) μmol·mol–1, and various sucrose concentrations were used. A. thaliana plants grown on a phytagar medium in small chambers with elevated CO2had longer roots, more lateral root growth and a more dichotomous branching pattern than plants grown in ambient CO2. Roots in elevated CO2had wider root diameters, and showed considerably more secondary growth such as larger diameter vascular cylinders and better-developed periderm. Addition of sucrose to the media closely resembled the effects of elevated CO2. Further, the increase in sucrose concentration had a more pronounced effect on root morphology under ambient, than elevated CO2. Thus, both elevated CO2and increased sucrose concentrations promote root growth by increasing their number, length, and diameter, and by changing the branching pattern from herringbone to dichotomous.

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Details

Published: Mar 01, 2007
Vol/Issue: 85(3)
Pages: 324-330
License: View

Authors

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Elaine Lee-Ho