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Hypoxia sensing in plants: On a quest for ion channels as putative oxygen sensors


Wang, F and Chen, Z-H and Shabala, S, Hypoxia sensing in plants: On a quest for ion channels as putative oxygen sensors, Plant and Cell Physiology, 58, (7) pp. 1126-1142. ISSN 0032-0781 (2017) [Refereed Article]

Copyright Statement

Copyright 2017 The Authors

DOI: doi:10.1093/pcp/pcx079


Over 17 million km2 of land is affected by soil flooding every year, resulting in substantial yield losses and jeopardizing food security across the globe. A key step in resolving this problem and creating stress-tolerant cultivars is an understanding of the mechanisms by which plants sense low-oxygen stress. In this work, we review the current knowledge about the oxygen-sensing and signaling pathway in mammalian and plant systems and postulate the potential role of ion channels as putative oxygen sensors in plant roots. We first discuss the definition and requirements for the oxygen sensor and the difference between sensing and signaling. We then summarize the literature and identify several known candidates for oxygen sensing in the mammalian literature. This includes transient receptor potential (TRP) channels; K+-permeable channels (Kv, BK and TASK); Ca2+ channels (RyR and TPC); and various chemo-and reactive oxygen species (ROS)-dependent oxygen sensors. Identified key oxygen-sensing domains (PAS, GCS, GAF and PHD) in mammalian systems are used to predict the potential plant counterparts in Arabidopsis. Finally, the sequences of known mammalian ion channels with reported roles in oxygen sensing were employed to BLAST the Arabidopsis genome for the candidate genes. Several plasma membrane and tonoplast ion channels (such as TPC, AKT and KCO) and oxygen domain-containing proteins with predicted oxygen-sensing ability were identified and discussed. We propose a testable model for potential roles of ion channels in plant hypoxia sensing.

Item Details

Item Type:Refereed Article
Keywords:AKT2, Arabidopsis thaliana, comparative bioinformatics, KCO4, oxygen-sensing domain, protein domain analysis, TPC1
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Horticultural crops not elsewhere classified
UTAS Author:Wang, F (Miss Feifei Wang)
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:119363
Year Published:2017
Web of Science® Times Cited:43
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2017-07-31
Last Modified:2018-05-23

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