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Drought Stress alters Solute Allocation in Broadleaf Dock (Rumex obtusifolius)

Published online by Cambridge University Press:  20 January 2017

Anna Katarina Gilgen  and
Urs Feller
Anna Katarina Gilgen*
Affiliation:
Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland
Urs Feller
Affiliation:
Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland
*
Corresponding author's E-mail: [email protected]
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Abstract

According to climate models, drier summers must be expected more frequently in Central Europe during the next decades, which may influence plant performance and competition in grassland. The overall source–sink relations in plants, especially allocation of solutes to above- and below-ground parts, may be affected by drought. To investigate solute export from a given leaf of broadleaf dock, a solution containing 57Co and 65Zn was introduced through a leaf flap. The export from this leaf was detected by analysing radionuclide contents in various plant parts. Less label was allocated to new leaves and more to roots under drought. The observed alterations of source–sink relations in broadleaf dock were reversible during a subsequent short period of rewatering. These findings suggest an increased resource allocation to roots under drought improving the functionality of the plants.

Keywords

Broadleaf dock, Rumex obtusifolius L. RUMOBClimate changegrasslandphloem transportrecoverywater limitation
Type
Weed Biology and Ecology
Information
Weed Science , Volume 61 , Issue 1 , March 2013 , pp. 104 - 108
Copyright
Copyright © Weed Science Society of America 

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