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Revealing the role of the calcineurin B-like protein-interacting protein kinase 9 (CIPK9) in rice adaptive responses to salinity, osmotic stress, and K+ deficiency

Citation

Shabala, S and Alnayef, M and Bose, J and Chen, Z-H and Ventkataraman, G and Zhou, M and Shabala, L and Yu, M, Revealing the role of the calcineurin B-like protein-interacting protein kinase 9 (CIPK9) in rice adaptive responses to salinity, osmotic stress, and K+ deficiency, Plants, 10, (8) Article 1513. ISSN 2223-7747 (2021) [Refereed Article]


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Copyright Statement

Copyright: 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons 4.0 International (CC BY 4.0) license (https://creativecommons.org/licenses/by/4.0/).

DOI: doi:10.3390/plants10081513

Abstract

In plants, calcineurin B-like (CBL) proteins and their interacting protein kinases (CIPK) form functional complexes that transduce downstream signals to membrane effectors assisting in their adaptation to adverse environmental conditions. This study addresses the issue of the physiological role of CIPK9 in adaptive responses to salinity, osmotic stress, and K+ deficiency in rice plants. Whole-plant physiological studies revealed that Oscipk9 rice mutant lacks a functional CIPK9 gene and displayed a mildly stronger phenotype, both under saline and osmotic stress conditions. The reported difference was attributed to the ability of Oscipk9 to maintain significantly higher stomatal conductance (thus, a greater carbon gain). Oscipk9 plants contained much less K+ in their tissues, implying the role of CIPK9 in K+ acquisition and homeostasis in rice. Oscipk9 roots also showed hypersensitivity to ROS under conditions of low K+ availability suggesting an important role of H2O2 signalling as a component of plant adaptive responses to a low-K environment. The likely mechanistic basis of above physiological responses is discussed.

Item Details

Item Type:Refereed Article
Keywords:rice, salinity, osmotic stress, K<sup>+</sup> deficiency, calcineurin, CIPK9, calcium signalling, potassium transport, AKT, HAK, reactive oxygen species, ABA, stomata, CBL, CIPK
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)
UTAS Author:Alnayef, M (Mr Mohammad Alnayef)
UTAS Author:Zhou, M (Professor Meixue Zhou)
UTAS Author:Shabala, L (Associate Professor Lana Shabala)
ID Code:147640
Year Published:2021
Deposited By:TIA - Research Institute
Deposited On:2021-11-10
Last Modified:2022-04-08
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