Chloride on the Move

Bo Li, Mark A. Tester, Matthew Gilliham

Research output: Contribution to journalArticlepeer-review

142 Scopus citations

Abstract

Chloride (Cl−) is an essential plant nutrient but under saline conditions it can accumulate to toxic levels in leaves; limiting this accumulation improves the salt tolerance of some crops. The rate-limiting step for this process – the transfer of Cl− from root symplast to xylem apoplast, which can antagonize delivery of the macronutrient nitrate (NO3−) to shoots – is regulated by abscisic acid (ABA) and is multigenic. Until recently the molecular mechanisms underpinning this salt-tolerance trait were poorly defined. We discuss here how recent advances highlight the role of newly identified transport proteins, some that directly transfer Cl− into the xylem, and others that act on endomembranes in ‘gatekeeper’ cell types in the root stele to control root-to-shoot delivery of Cl−.
Original languageEnglish (US)
Pages (from-to)236-248
Number of pages13
JournalTrends in Plant Science
Volume22
Issue number3
DOIs
StatePublished - Jan 9 2017

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors thank the Australian Research Council (ARC) for funding M.G. through FT130100709 and CE140100008, and M.T. through DP1095542; the Grains Research and Development Corporation (Australia) for funding M.T. through UA00118 and M.G. through UA00145; and Wine Australia and the Waite Research Institute for funding M.G. Financial support to M.T. from the King Abdullah University of Science and Technology is also gratefully acknowledged.

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