The University of Southampton
University of Southampton Institutional Repository

Water pathways in higher plants II. water pathways in boots

Tanton, T.W. and Crowdy, S.H. (1972) Water pathways in higher plants II. water pathways in boots Journal of Experimental Botany, 23, (3), pp. 619-625. (doi:10.1093/jxb/23.3.619).

Record type: Article


The technique for studying the pathways of water movement described, in the first paper of this series has been applied to the transpiration stream in the roots of higher plants. Free space is confined to the cell walls except in flooded tissue where intercellular spaces are also included. Errors involved in free-space estimates are discussed and free-space volumes of 5.4 per cent have been obtained for wheat root cortex and 4.1 per cent for carrot xylem parenchyma. The main water-absorbing regions of roots begin immediately behind the elongating zone, where the first xylem elements are fully differentiated, and end when the endodermis undergoes secondary wall development. In the cortex the transpiration stream is located mainly in the cell wall. Calculations indicate that the symplastic pathway is of only minor importance in transpiring plants. At the endodermis the free-space pathway is blocked by the Casparian strip and all water and solute entering the stele must pass through the lumen of the endodermal cells. The permeability of individual endodermal cells varies considerably both between cells of the same species and between those of different species. Once inside the endodermis, the transpiration stream returns to the cell-wall pathway until it reaches the xylem vessels where it enters the lumen of the mature xylem elements.

Full text not available from this repository.

More information

Published date: August 1972


Local EPrints ID: 75320
ISSN: 0022-0957
PURE UUID: be12951e-59de-439d-885d-b3400447273f

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:43

Export record


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.