The epidermal bladder cell-free mutant of the salt tolerant quinoa challenges our understanding of halophyte crop salinity tolerance
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The epidermal bladder cell-free mutant of the salt tolerant quinoa challenges our understanding of halophyte crop salinity tolerance. / Moog, Max William; Trinh, Mai Duy Luu; Nørrevang, Anton Frisgaard; Bendtsen, Amalie Kofoed; Wang, Cuiwei; Østerberg, Jeppe Thulin; Shabala, Sergey; Hedrich, Rainer; Wendt, Toni; Palmgren, Michael.
In: New Phytologist, Vol. 236, No. 4, 2022, p. 1409-1421.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - The epidermal bladder cell-free mutant of the salt tolerant quinoa challenges our understanding of halophyte crop salinity tolerance
AU - Moog, Max William
AU - Trinh, Mai Duy Luu
AU - Nørrevang, Anton Frisgaard
AU - Bendtsen, Amalie Kofoed
AU - Wang, Cuiwei
AU - Østerberg, Jeppe Thulin
AU - Shabala, Sergey
AU - Hedrich, Rainer
AU - Wendt, Toni
AU - Palmgren, Michael
N1 - This article is protected by copyright. All rights reserved.
PY - 2022
Y1 - 2022
N2 - Halophytes tolerate high salinity levels that would kill conventional crops. Understanding salt tolerance mechanisms will provide clues for breeding salt-tolerant plants. Many halophytes such as quinoa (Chenopodium quinoa) are covered by a layer of epidermal bladder cells (EBCs) that are thought to mediate salt tolerance by serving as salt dumps. We isolated an epidermal bladder cell-free quinoa mutant (ebcf) that completely lacked EBCs and was mutated in REBC and REBC-like1. This mutant showed no loss of salt stress tolerance. When wild-type quinoa plants were exposed to saline soil, EBCs accumulated K + as the major cation, in quantities far exceeding those for Na + . Emerging leaves densely packed with EBCs had the lowest Na + content, whereas old leaves with deflated EBCs served as Na + sinks. When the leaves expanded, K + was recycled from EBCs, resulting in turgor loss that led to a progressive deflation of EBCs. Our findings suggest that EBCs in young leaves serve as a K + -powered hydrodynamic system that functions as a water sink for solute storage. Na + accumulates within old leaves that subsequently wilt and are shed. This mechanism improves the survival of quinoa under high salinity.
AB - Halophytes tolerate high salinity levels that would kill conventional crops. Understanding salt tolerance mechanisms will provide clues for breeding salt-tolerant plants. Many halophytes such as quinoa (Chenopodium quinoa) are covered by a layer of epidermal bladder cells (EBCs) that are thought to mediate salt tolerance by serving as salt dumps. We isolated an epidermal bladder cell-free quinoa mutant (ebcf) that completely lacked EBCs and was mutated in REBC and REBC-like1. This mutant showed no loss of salt stress tolerance. When wild-type quinoa plants were exposed to saline soil, EBCs accumulated K + as the major cation, in quantities far exceeding those for Na + . Emerging leaves densely packed with EBCs had the lowest Na + content, whereas old leaves with deflated EBCs served as Na + sinks. When the leaves expanded, K + was recycled from EBCs, resulting in turgor loss that led to a progressive deflation of EBCs. Our findings suggest that EBCs in young leaves serve as a K + -powered hydrodynamic system that functions as a water sink for solute storage. Na + accumulates within old leaves that subsequently wilt and are shed. This mechanism improves the survival of quinoa under high salinity.
U2 - 10.1111/nph.18420
DO - 10.1111/nph.18420
M3 - Journal article
C2 - 35927949
VL - 236
SP - 1409
EP - 1421
JO - New Phytologist
JF - New Phytologist
SN - 0028-646X
IS - 4
ER -
ID: 316017802