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The dynamics of xylem sap pH under drought: a universal response in herbs?

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<mark>Journal publication date</mark>12/2016
<mark>Journal</mark>Plant and Soil
Issue number1-2
Volume409
Number of pages14
Pages (from-to)259-272
Publication StatusPublished
Early online date22/06/16
<mark>Original language</mark>English

Abstract

Long distance signals in xylem from roots to leaves are important in plant response to drought stress. Abscisic acid (ABA) plays a key role in drought signaling in plants but apoplastic pH may modulate its effect by distributing ABA into various compartments in leaves. We aimed to reveal the dynamics of changes in sap pH and its relationships with the transport of inorganic and organic ions in eight herbaceous plant species under continuously declining soil water content. We tested several hypotheses related to the mechanism of pH changes in xylem.