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Stalk cell polar ion transport provide for bladder-based salinity tolerance in Chenopodium quinoa


Bazihizina, N and Bohm, J and Messerer, M and Stigloher, C and Muller, HM and Cuin, TA and Maierhofer, T and Cabot, J and Mayer, KFX and Fella, C and Huang, S and Al-Rasheid, KSA and Alquraishi, S and Breadmore, MC and Mancuso, S and Shabala, S and Ache, P and Zhang, H and Zhu, J-K and Hendrich, R and Scherzer, S, Stalk cell polar ion transport provide for bladder-based salinity tolerance in Chenopodium quinoa, The New phytologist, 235, (5) pp. 1822-1835. ISSN 1469-8137 (2022) [Refereed Article]

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Copyright 2022 The Authors. This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

DOI: doi:10.1111/nph.18205


Chenopodium quinoa uses epidermal bladder cells (EBCs) to sequester excess salt. Each EBC complex consists of a leaf epidermal cell, a stalk cell, and the bladder. Under salt stress, sodium (Na+ ), chloride (Cl- ), potassium (K+ ) and various metabolites are shuttled from the leaf lamina to the bladders. Stalk cells operate as both a selectivity filter and a flux controller. In line with the nature of a transfer cell, advanced transmission electron tomography, electrophysiology, and fluorescent tracer flux studies revealed the stalk cell's polar organization and bladder-directed solute flow. RNA sequencing and cluster analysis revealed the gene expression profiles of the stalk cells. Among the stalk cell enriched genes, ion channels and carriers as well as sugar transporters were most pronounced. Based on their electrophysiological fingerprint and thermodynamic considerations, a model for stalk cell transcellular transport was derived.

Item Details

Item Type:Refereed Article
Keywords:quinoa; salt bladders; potassium; sodium; salinity stress
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant cell and molecular biology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Grains and seeds not elsewhere classified
UTAS Author:Bazihizina, N (Dr Nadia Bazihizina)
UTAS Author:Cuin, TA (Dr Tracey Cuin)
UTAS Author:Breadmore, MC (Professor Michael Breadmore)
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:155132
Year Published:2022
Web of Science® Times Cited:1
Deposited By:Agriculture and Food Systems
Deposited On:2023-01-30
Last Modified:2023-03-20

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