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Bazihizina, N.* ; Böhm, J.* ; Messerer, M. ; Stigloher, C.* ; Müller, H.M.* ; Cuin, T.A.* ; Maierhofer, T.* ; Cabot, J.* ; Mayer, K.F.X. ; Fella, C.* ; Huang, S.* ; Al-Rasheid, K.A.S.* ; Alquraishi, S.A.* ; Breadmore, M.* ; Mancuso, S.* ; Shabala, S.* ; Ache, P.* ; Zhang, H.* ; Zhu, J.K.* ; Hedrich, R.* ; Scherzer, S.*

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

New Phytol. 235, 1822-1835 (2022)

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Chenopodium quinoa uses epidermal bladder cells (EBCs) to sequester excess salt. Each EBC complex consist of a leaf epidermal cell, a stalk cell, and the very bladder. Under salt stress, Na⁺ , Cl^- , K⁺ and 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 spotted the stalk cell's polar organization and bladder-directed solute flow. RNA sequencing and cluster analysis revealed the stalk cells gene expression profiles. 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.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Quinoa ; Halophyte ; Polar Ion Transport ; Salt Tolerance ; Stalk Cell

ISSN (print) / ISBN 0028-646X

e-ISSN 1469-8137

Journal New Phytologist

Quellenangaben Volume: 235, Issue: 5, Pages: 1822-1835

Publisher Wiley

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Research Unit Plant Genome and Systems Biology (PGSB)

Grants King Saud University
Chinese Academy of Sciences
National Natural Science Foundation of China
Deutsche Forschungsgemeinschaft
Australian Research Council
European Commission
Pakistan Science Foundation
National Distinguished Expert Project
King Saud University´s International Cooperation and Scientific Twinning Dept.