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Understanding the molecular basis of salt sequestration in epidermal bladder cells of Chenopodium quinoa

Bohm, J ORCID: 0000-0002-8104-8705, Messerer, M, Muller, HM, Scholz-Starke, J, Gradogna, A, Scherzer, S, Maierhofer, T, Bazihizina, N, Zhang, H, Stigloher, C, Ache, P, Al-Rasheid, KAS, Mayer, KFX, Shabala, S ORCID: 0000-0003-2345-8981, Carpaneto, A, Haberer, G, Zhu, J-K and Hedrich, R 2018 , 'Understanding the molecular basis of salt sequestration in epidermal bladder cells of Chenopodium quinoa' , Current Biology, vol. 28, no. 19 , pp. 3075-3085 , doi: 10.1016/j.cub.2018.08.004.

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Soil salinity is destroying arable land and is considered to be one of the major threats to global food security in the 21st century. Therefore, the ability of naturally salt-tolerant halophyte plants to sequester large quantities of salt in external structures, such as epidermal bladder cells (EBCs), is of great interest. Using Chenopodium quinoa, a pseudo-cereal halophyte of great economic potential, we have shown previously that, upon removal of salt bladders, quinoa becomes salt sensitive. In this work, we analyzed the molecular mechanism underlying the unique salt dumping capabilities of bladder cells in quinoa. The transporters differentially expressed in the EBC transcriptome and functional electrophysiological testing of key EBC transporters in Xenopus oocytes revealed that loading of Na+ and Cl− into EBCs is mediated by a set of tailored plasma and vacuole membrane-based sodium-selective channel and chloride-permeable transporter.

Item Type: Article
Authors/Creators:Bohm, J and Messerer, M and Muller, HM and Scholz-Starke, J and Gradogna, A and Scherzer, S and Maierhofer, T and Bazihizina, N and Zhang, H and Stigloher, C and Ache, P and Al-Rasheid, KAS and Mayer, KFX and Shabala, S and Carpaneto, A and Haberer, G and Zhu, J-K and Hedrich, R
Keywords: quinoa, HKT, sodium, potassium, bladder cells
Journal or Publication Title: Current Biology
Publisher: Cell Press
ISSN: 0960-9822
DOI / ID Number: 10.1016/j.cub.2018.08.004
Copyright Information:

Copyright 2018 Elsevier Ltd.

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