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NADPH oxidases and the evolution of plant salinity tolerance


Liu, M and Yu, H and Ouyang, B and Shi, C and Demidchik, V and Hao, Z and Yu, M and Shabala, SN, NADPH oxidases and the evolution of plant salinity tolerance, Plant Cell and Environment, 43, (12) pp. 2957-2968. ISSN 0140-7791 (2020) [Refereed Article]

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DOI: doi:10.1111/pce.13907


Soil salinization is a major threat to global food security and the biodiversity of natural ecosystems. To adapt to salt stress, plants rely on ROS-mediated signalling networks that operate upstream of a broad array of physiological and genetic processes. A key player in ROS signalling is NADPH oxidase, a plasma-membrane-bound enzyme encoded by RBOH genes. In this study, we have conducted a comprehensive bioinformatic analysis of over 50 halophytic and glycophytic species to link the difference in the kinetics of ROS signalling between contrasting species with the abundance and/or structure of NADPH oxidases. The RBOH proteins were predicted in all the tested plant lineages except some algae species from the Rhodophyta, Chlorophyta and Streptophyta. Within the glycophytic group, the number of RBOH copies correlated negatively with salinity stress tolerance, suggesting that a reduction in the number of RBOH isoforms may be potentially related to the evolution of plant salinity tolerance. While halophytes did not develop unique protein families during evolution, they evolved additional phosphorylation target sites at the N-termini of NADPH oxidases, potentially modulating enzyme activity and allowing more control over their function, resulting in more efficient ROS signalling and adaptation to saline conditions.

Item Details

Item Type:Refereed Article
Keywords:glycophy, tehalophy, tephosphorylation, phylogenetic analysis, reactive oxygen species (ROS), respiratory burst oxidase homologue (RBOH), salinity stress
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant biochemistry
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other plant production and plant primary products
Objective Field:Plant product traceability and quality assurance (excl. forest products)
UTAS Author:Shabala, SN (Professor Sergey Shabala)
ID Code:151902
Year Published:2020
Web of Science® Times Cited:19
Deposited By:Agriculture and Food Systems
Deposited On:2022-08-08
Last Modified:2022-08-18

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