scholarly journals Tobacco Transcription Factor NtbHLH123 Confers Tolerance to Cold Stress by Regulating the NtCBF Pathway and Reactive Oxygen Species Homeostasis

2018 ◽  
Vol 9 ◽  
Author(s):  
Qiang Zhao ◽  
Xiaohua Xiang ◽  
Dan Liu ◽  
Aiguo Yang ◽  
Yuanying Wang
Keyword(s):  
Reactive Oxygen Species ◽  
Transcription Factor ◽  
Cold Stress ◽  
Reactive Oxygen ◽  
Oxygen Species

scholarly journals Reactive Oxygen Species and the Redox-Regulatory Network in Cold Stress Acclimation

Antioxidants ◽  
2018 ◽  
Vol 7 (11) ◽  
pp. 169 ◽  
Author(s):  
Anna Dreyer ◽  
Karl-Josef Dietz
Keyword(s):  
Reactive Oxygen Species ◽  
Cold Stress ◽  
Regulatory Network ◽  
Chilling Stress ◽  
Nicotinamide Adenine Dinucleotide Phosphate ◽  
Reactive Oxygen ◽  
Cold Climate ◽  
Oxygen Species ◽  
Cold Temperatures ◽  
Stress Acclimation

Cold temperatures restrict plant growth, geographical extension of plant species, and agricultural practices. This review deals with cold stress above freezing temperatures often defined as chilling stress. It focuses on the redox regulatory network of the cell under cold temperature conditions. Reactive oxygen species (ROS) function as the final electron sink in this network which consists of redox input elements, transmitters, targets, and sensors. Following an introduction to the critical network components which include nicotinamide adenine dinucleotide phosphate (NADPH)-dependent thioredoxin reductases, thioredoxins, and peroxiredoxins, typical laboratory experiments for cold stress investigations will be described. Short term transcriptome and metabolome analyses allow for dissecting the early responses of network components and complement the vast data sets dealing with changes in the antioxidant system and ROS. This review gives examples of how such information may be integrated to advance our knowledge on the response and function of the redox regulatory network in cold stress acclimation. It will be exemplarily shown that targeting the redox network might be beneficial and supportive to improve cold stress acclimation and plant yield in cold climate.

scholarly journals Protein Kinase D Mediates Mitochondrion-to-Nucleus Signaling and Detoxification from Mitochondrial Reactive Oxygen Species

2005 ◽  
Vol 25 (19) ◽  
pp. 8520-8530 ◽  
Author(s):  
Peter Storz ◽  
Heike Döppler ◽  
Alex Toker
Keyword(s):  
Reactive Oxygen Species ◽  
Transcription Factor ◽  
Protein Kinase ◽  
Reactive Oxygen ◽  
Protein Kinase D ◽  
Oxygen Species ◽  
Mitochondrial Reactive Oxygen Species ◽  
Mitochondrial Oxidative Stress ◽  
Cellular Survival ◽  
Mitochondrial Ros

ABSTRACT Efficient elimination of mitochondrial reactive oxygen species (mROS) correlates with increased cellular survival and organism life span. Detoxification of mitochondrial ROS is regulated by induction of the nuclear SOD2 gene, which encodes the manganese-dependent superoxide dismutase (MnSOD). However, the mechanisms by which mitochondrial oxidative stress activates cellular signaling pathways leading to induction of nuclear genes are not known. Here we demonstrate that release of mROS activates a signal relay pathway in which the serine/threonine protein kinase D (PKD) activates the NF-κB transcription factor, leading to induction of SOD2. Conversely, the FOXO3a transcription factor is dispensable for mROS-induced SOD2 induction. PKD-mediated MnSOD expression promotes increased survival of cells upon release of mROS, suggesting that mitochondrion-to-nucleus signaling is necessary for efficient detoxification mechanisms and cellular viability.

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