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    Rights statement: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Annals of Botany following peer review. The definitive publisher-authenticated version Francisco Jose Valenzuela, Daniela Reineke, Dante Leventini, Christopher Cody Lee Chen, Edward G Barrett-Lennard, Timothy D Colmer, Ian C Dodd, Sergey Shabala, Patrick Brown, Nadia Bazihizina, Plant responses to heterogeneous salinity: agronomic relevance and research priorities, Annals of Botany, 2022, 129, 5: 499-518 is available online at: https://academic.oup.com/aob/article/129/5/499/6529474

    Accepted author manuscript, 11.5 MB, PDF document

    Embargo ends: 16/02/23

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

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Plant responses to heterogeneous salinity: agronomic relevance and research priorities

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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  • Francisco Jose Valenzuela
  • Daniela Reineke
  • Dante Leventini
  • Christopher Cody Lee Chen
  • Edward G Barrett-Lennard
  • Timothy D Colmer
  • Ian C Dodd
  • Sergey Shabala
  • Patrick Brown
  • Nadia Bazihizina
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<mark>Journal publication date</mark>30/04/2022
<mark>Journal</mark>Annals of Botany
Issue number5
Volume129
Number of pages20
Pages (from-to)499-518
Publication StatusPublished
Early online date16/02/22
<mark>Original language</mark>English

Abstract

Soil salinity, in both natural and managed environments, is highly heterogeneous and understanding how plants respond to this spatiotemporal heterogeneity is increasingly important for sustainable agriculture in the era of global climate change. While the vast majority of research on crop response to salinity utilises homogenous saline conditions, a much smaller, but important, effort has been made in the past decade to understand plant molecular and physiological responses to heterogeneous salinity mainly by using split-root studies. These studies have begun to unravel how plants compensate for water/nutrient deprivation and limit salt stress by optimising root-foraging in the most favourable parts of the soil. This review provides an overview of the patterns of salinity heterogeneity in rain-fed and irrigated systems. We then discuss results from split-root studies and the recent progress in understanding physiological and molecular mechanisms regulating plant responses to heterogeneous root-zone salinity and nutrient conditions. We focus on mechanisms by which plants (salt/nutrient sensing, root-shoot signalling and water uptake) could optimise the use of less-saline patches within the root-zone, thereby enhancing growth under heterogeneous soil salinity conditions. Finally, we place these findings in the context of defining future research priorities, possible irrigation management and crop breeding opportunities to improve productivity from salt-affected lands.

Bibliographic note

This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Annals of Botany following peer review. The definitive publisher-authenticated version Francisco Jose Valenzuela, Daniela Reineke, Dante Leventini, Christopher Cody Lee Chen, Edward G Barrett-Lennard, Timothy D Colmer, Ian C Dodd, Sergey Shabala, Patrick Brown, Nadia Bazihizina, Plant responses to heterogeneous salinity: agronomic relevance and research priorities, Annals of Botany, 2022, 129, 5: 499-518 is available online at: https://academic.oup.com/aob/article/129/5/499/6529474