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

Citation

Shabala, S, Linking ploidy level with salinity tolerance: NADPH-dependent 'ROS-Ca2+ hub' in the spotlight, Journal of Experimental Botany, 70, (4) pp. 1063-1067. ISSN 0022-0957 (2019) [Refereed Article]


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DOI: doi:10.1093/jxb/erz042

Abstract

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 Details

Item Type:Refereed Article
Keywords:Ca2+ transport, H2O2, K+ retention, K+/Na+ homeostasis, Na+ exclusion, polyploid, salinity stress, salinity, RBOH, ploidy, calcium
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other Plant Production and Plant Primary Products
Objective Field:Plant Production and Plant Primary Products not elsewhere classified
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:136640
Year Published:2019
Web of Science® Times Cited:1
Deposited By:Agriculture and Food Systems
Deposited On:2020-01-11
Last Modified:2020-01-14
Downloads:0

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