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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:	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:	Other 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:	12
Deposited By:	Agriculture and Food Systems
Deposited On:	2020-01-11
Last Modified:	2020-04-03
Downloads:	26 View Download Statistics