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Linking ploidy level with salinity tolerance: NADPH-dependent 'ROS-Ca2+ hub' in the spotlight

Shabala, S ORCID: 0000-0003-2345-8981 2019 , 'Linking ploidy level with salinity tolerance: NADPH-dependent 'ROS-Ca2+ hub' in the spotlight' , Journal of Experimental Botany, vol. 70, no. 4 , pp. 1063-1067 , doi:

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Polyploidy is considered to be a driving force in plant evolution that enabled adaptation to adverse environmental conditions such as soil salinity. This phenomenon is examined by Liu et al. (2019) in relation to root-zone-specific ion transport, and can be explained by more efficient operation of an NADPH-dependent ‘ROS–Ca2+ hub’ and desensitization of ROS-inducible cation channels in polyploid lines. Two hypotheses include that non-selective cation channels in polyploid lines are formed of chimeric tetramers, with some subunits having modified thiol groups (hence, reduced sensitivity to H2O2), or alternatively that inactivation of Ca2+ channels and higher Ca2+-ATPase pump activity may reduce the level of cytosolic free Ca2+ and provide a negative control over NADPH oxidase operation.

Item Type: Article
Authors/Creators:Shabala, S
Keywords: Ca2+ transport, H2O2, K+ retention, K+/Na+ homeostasis, Na+ exclusion, polyploid, salinity stress, salinity, RBOH, ploidy, calcium
Journal or Publication Title: Journal of Experimental Botany
Publisher: Oxford Univ Press
ISSN: 0022-0957
DOI / ID Number:
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© The Author(s) 2019. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

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