Complete mechanical impedance increases the turgor of cells in the apex of pea roots

A - Papers appearing in refereed journals

Clark, L. J., Whalley, W. R., Dexter, A. R., Barraclough, P. B. and Leigh, R. A. 1996. Complete mechanical impedance increases the turgor of cells in the apex of pea roots. Plant, Cell and Environment. 19 (9), pp. 1099-1102. https://doi.org/10.1111/j.1365-3040.1996.tb00217.x

AuthorsClark, L. J., Whalley, W. R., Dexter, A. R., Barraclough, P. B. and Leigh, R. A.
Abstract

In this paper we describe an experimental approach which allows turgor (P) in an impeded root to be measured without the need to remove the root from the impeding environment, The maximum axial growth pressure (sigma(max)) generated by completely impeded pea (Pisum sativum L.) roots was measured using a novel apparatus incorporating a force transducer, The apparatus was designed so that it was possible to gain access to the impeded root with the microcapillary of a pressure probe and so obtain in situ measurements of P, Turgor in cells in the apical region of impeded roots was 0.78 MPa, compared with 0.55 MPa in unimpeded roots, In impeded roots, sigma(max) was 0.52 MPa, showing that the pressure component resulting from cell wall tension (W, where W = P - sigma) decreased from 0.55 to 0.26 MPa as the roots became impeded, When impeded roots were removed from the apparatus, there was no decrease in P over the following 90 min, Impedance did not cause P to change in the non-elongating part of the roots further from the apex.

KeywordsPlant Sciences
Year of Publication1996
JournalPlant, Cell and Environment
Journal citation19 (9), pp. 1099-1102
Digital Object Identifier (DOI)https://doi.org/10.1111/j.1365-3040.1996.tb00217.x
Open accessPublished as non-open access
Funder project or code114
212
442
Project: 011351
ISSN01407791
PublisherWiley

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