Tanner, Widmar and Beevers, H. (2001) Transpiration, a prerequisite for long-distance transport of minerals in plants? PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 98 (16). pp. 9443-9447. ISSN 0027-8424
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The major "benefit" alleged to accrue from transpiration (the evaporative loss of water from plant surfaces) is that it is essential for the long-distance transport of mineral ions, but the possible interrelation between these two processes has rarely been tested. Transpiration was experimentally dissociated from mineral supply by growing sunflowers (Helianthus anuus) in hydroculture and providing mineral nutrients only during the nights. These plants grew as well as a control group that received nutrients only during the day and transpired 12-15 times more water during the exposure period. It thus appears that convective water transport in the xylem, brought about by root pressure and the resultant guttation, "growth water," and Munch's phloem counterflow is in itself sufficient for long-distance mineral supply and that transpiration is not required for this function.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | WATER TRANSPORT; ION-TRANSPORT; |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Zellbiologie und Pflanzenphysiologie (Prof. Dr. Klaus Grasser) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 Dec 2021 08:04 |
| Last Modified: | 20 Dec 2021 08:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41249 |
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