The University of Southampton
University of Southampton Institutional Repository

Increased root growth in elevated CO2: a biophysical analysis of root cell elongation

Ferris, R. and Taylor, Gail (1994) Increased root growth in elevated CO2: a biophysical analysis of root cell elongation Journal of Experimental Botany, 45, (11), pp. 1603-1612.

Record type: Article


A biophysical analysis of root expansion was conducted in four chalk downland herbs (Sanguisorba minor Scop., Lotus corniculatus L., Anthyllis vul-neraria L. and Plantago media L.) exposed to either ambient or elevated CO2in controlled environment cabinets. Measurements of fine (F) and extra-fine (EF) root extension rate (RER), water relations, and cell wall tensiometric extensibility revealed differences in the diurnal pattern of root growth between species. After 35 d of exposure to elevated CO2, RER of both F and EF roots increased significantly in darkness and on illumination for S. minor, whilst for A. vulneraria (EF roots only) and L. corniculatus a significant increase occurred at night whereas for P. media a significant increase occurred during the day. Cells measured in the zone of elongation were longer in all species exposed to elevated CO2. Water potential ({Psi}), solute potential ({Psi}), turgor pressure (P), yield turgor (Y) and effective turgor (Pe) were measured by stress-relaxation of excised root tips placed in psychro-meters. Solute potentials decreased significantly for all species following exposure to elevated CO2. In S. minor and L. corniculatus, P and Pe, respectively, were higher in elevated CO2. No significant effects of CO2 on Y were observed (not shown). Root cell wall tensiometric extensibility, measured as % plasticity, increased in all species exposed to elevated CO2. These results suggest that root growth is enhanced following increased cell expansion and that increased P and cell wall tensiometric extensibility are both important for root growth in elevated CO2.

PDF Increased_root_growth_in_elevated_CO2__a_biophysical_analysis_of_root_cell_elongation.pdf - Version of Record
Restricted to Repository staff only
Download (1MB)

More information

Published date: 1994


Local EPrints ID: 159899
ISSN: 0022-0957
PURE UUID: 319f398d-22b1-4f11-b3a6-6f773c077928

Catalogue record

Date deposited: 08 Jul 2010 09:27
Last modified: 18 Jul 2017 12:36

Export record


Author: R. Ferris
Author: Gail Taylor

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.