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Water transport across roots

Title data

Steudle, Ernst:
Water transport across roots.
In: Plant and Soil. Vol. 167 (November 1994) Issue 1 . - pp. 79-90.
ISSN 1573-5036
DOI: https://doi.org/10.1007/BF01587602

Abstract in another language

Usually, roots are looked at as rather perfect osmometers with the endodermis being the "root membrane" which is equivalent to the plasma membrane of cells. However, this "single-equivalent-membrane model" of the root does not explain the findings of a variable hydraulic resistance of roots as well as of differences between hydraulic and osmotic water flow and of low reflection coefficients of roots. Recent work with the root pressure probe is reviewed and discussed which indicates that the simple osmometer model of the root has to be extended by incorporating its composite structure, i.e. the fact that there are different parallel pathways for water in the root, namely, the cell-to-cell and apoplasmic path. The new "composite transport model of the root" readily explains the experimental findings mentioned above. Pressure probe work with roots in which the endodermis was punctured to create an additional parallel path as well as anatomical studies support the model.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER33684
Institutions of the University: Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 12 Nov 2015 07:44
Last Modified: 12 Nov 2015 07:44
URI: https://eref.uni-bayreuth.de/id/eprint/22422