BdCIPK31, a Calcineurin B-Like Protein-Interacting Protein Kinase, Regulates Plant Response to Drought and Salt Stress

BdCIPK31, a Calcineurin B-Like Protein-Interacting Protein Kinase, Regulates Plant Response to Drought and Salt Stress

Calcineurin B-like protein interacting protein kinases (CIPKs) are vital elements in plant abiotic stress signaling pathways. However, the functional mechanism of CIPKs has not been understood clearly, especially in , a new monocot model plant. In this study, a gene from was characterized. was downr...

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Published in:Frontiers in plant science Vol. 8; p. 1184
Main Authors: Luo, Qingchen, Wei, Qiuhui, Wang, Ruibin, Zhang, Yang, Zhang, Fan, He, Yuan, Zhou, Shiyi, Feng, Jialu, Yang, Guangxiao, He, Guangyuan
Format: Journal Article
Language:English
Published: Switzerland Frontiers Media S.A 07-07-2017
Subjects:
ABA
Brachypodium distachyon
CIPK
drought stress
Nicotiana tabacum
Plant Science
salt stress
ABA
salt stress
drought stress
Nicotiana tabacum
Brachypodium distachyon
CIPK
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Summary:Calcineurin B-like protein interacting protein kinases (CIPKs) are vital elements in plant abiotic stress signaling pathways. However, the functional mechanism of CIPKs has not been understood clearly, especially in , a new monocot model plant. In this study, a gene from was characterized. was downregulated by polyethylene glycol, NaCl, H O , and abscisic acid (ABA) treatments. Transgenic tobacco plants overexpressing presented improved drought and salt tolerance, and displayed hypersensitive response to exogenous ABA. Further investigations revealed that BdCIPK31 functioned positively in ABA-mediated stomatal closure, and transgenic tobacco exhibited reduced water loss under dehydration conditions compared with the controls. BdCIPK31 also affected Na /K homeostasis and root K loss, which contributed to maintain intracellular ion homeostasis under salt conditions. Moreover, the reactive oxygen species scavenging system and osmolyte accumulation were enhanced by overexpression, which were conducive for alleviating oxidative and osmotic damages. Additionally, overexpression of could elevate several stress-associated gene expressions under stress conditions. In conclusion, BdCIPK31 functions positively to drought and salt stress through ABA signaling pathway. Overexpressing functions in stomatal closure, ion homeostasis, ROS scavenging, osmolyte biosynthesis, and transcriptional regulation of stress-related genes.
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Reviewed by: Hong Luo, Clemson University, United States; Li Huang, Montana State University, United States; Chang-Jie Jiang, National Institute of Agrobiological Sciences, Japan
This article was submitted to Plant Biotechnology, a section of the journal Frontiers in Plant Science
These authors have contributed equally to this work.
Edited by: Junhua Peng, Center for Life Sci&Tech of China National Seed Group Co. Ltd., China
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2017.01184