scholarly journals Glucosyltransferase CsUGT78A14 Regulates Flavonols Accumulation and Reactive Oxygen Species Scavenging in Response to Cold Stress in Camellia sinensis

2019 ◽  
Vol 10 ◽  
Author(s):  
Mingyue Zhao ◽  
Jieyang Jin ◽  
Ting Gao ◽  
Na Zhang ◽  
Tingting Jing ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cold Stress ◽  
Camellia Sinensis ◽  
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 Reactive oxygen species as important regulators of cell division

2020 ◽  
Author(s):  
Weiliang Qi ◽  
Li Ma ◽  
Fei Wang ◽  
Ping Wang ◽  
Junyan Wu ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cell Wall ◽  
Cell Division ◽  
Cold Stress ◽  
Reactive Oxygen ◽  
Vascular Bundles ◽  
Oxygen Species ◽  
Root Primordia ◽  
Lateral Root Primordia

AbstractCurrently, the role of reactive oxygen species (ROS) in plant growth is a topic of interest. In this study, we discuss the role of ROS in cell division. We analyzed ROS’ impact on the stiffness of plant cell walls and whether ROS play an important role in Brassica napus’ ability to adapt to cold stress. Cultivated sterile seedlings and calli of cold-tolerant cultivar 16NTS309 were subjected to cold stress at 25°C and 4°C, respectively. Under normal conditions, O2.− mainly accumulated in the leaf edges, shoot apical meristem, leaf primordia, root tips, lateral root primordia, calli of meristematic nodular tissues, cambia, vascular bundles and root primordia, which are characterized by high division rates. After exposure to cold stress, the malondialdehyde and ROS (O2.−) contents in roots, stems and leaves of cultivar 16NTS309 were significantly higher than under non-cold conditions (P < 0.05). ROS (O2.−) were not only distributed in these zones, but also in other cells, at higher levels than under normal conditions. A strong ROS-based staining appeared in the cell wall. The results support a dual role for apoplastic ROS, in which they have direct effects on the stiffness of the cell wall, because ROS cleave cell-wall, and act as wall loosening agents, thereby either promoting or restricting cellular division. This promotes the appearance of new shoots and a strong root system, allowing plants to adapt to cold stress.

scholarly journals Crosstalk between Brassinosteroid and Redox Signaling Contributes to the Activation of CBF Expression during Cold Responses in Tomato

Antioxidants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 509
Author(s):  
Pingping Fang ◽  
Yu Wang ◽  
Mengqi Wang ◽  
Feng Wang ◽  
Cheng Chi ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cold Stress ◽  
Stress Responses ◽  
Critical Role ◽  
Reactive Oxygen ◽  
Central Component ◽  
H2o2 Production ◽  
Plant Responses ◽  
Oxygen Species ◽  
Loss Of Function

Brassinosteroids (BRs) play a critical role in plant responses to stress. However, the interplay of BRs and reactive oxygen species signaling in cold stress responses remains unclear. Here, we demonstrate that a partial loss of function in the BR biosynthesis gene DWARF resulted in lower whilst overexpression of DWARF led to increased levels of C-REPEAT BINDING FACTOR (CBF) transcripts. Exposure to cold stress increased BR synthesis and led to an accumulation of brassinazole-resistant 1 (BZR1), a central component of BR signaling. Mutation of BZR1 compromised the cold- and BR-dependent increases in CBFs and RESPIRATORY BURST OXIDASE HOMOLOG 1(RBOH1) transcripts, as well as preventing hydrogen peroxide (H2O2) accumulation in the apoplast. Cold- and BR-induced BZR1 bound to the promoters of CBF1, CBF3 and RBOH1 and promoted their expression. Significantly, suppression of RBOH1 expression compromised cold- and BR-induced accumulation of BZR1 and related increases in CBF transcripts. Moreover, RBOH1-dependent H2O2 production regulated BZR1 accumulation and the levels of CBF transcripts by influencing glutathione homeostasis. Taken together, these results demonstrate that crosstalk between BZR1 and reactive oxygen species mediates cold- and BR-activated CBF expression, leading to cold tolerance in tomato (Solanum lycopersicum).

scholarly journals Mechanisms of Chitosan Nanoparticles in the Regulation of Cold Stress Resistance in Banana Plants

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2670
Author(s):  
Anbang Wang ◽  
Jingyang Li ◽  
Arwa Abdulkreem AL-Huqail ◽  
Mohammad S. AL-Harbi ◽  
Esmat F. Ali ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cold Stress ◽  
Stress Tolerance ◽  
Foliar Application ◽  
Growth Parameters ◽  
Chitosan Nanoparticles ◽  
Reactive Oxygen ◽  
Soluble Carbohydrates ◽  
Antioxidant Enzyme Activities ◽  
Oxygen Species

Exposure of banana plants, one of the most important tropical and subtropical plants, to low temperatures causes a severe drop in productivity, as they are sensitive to cold and do not have a strong defense system against chilling. Therefore, this study aimed to improve the growth and resistance to cold stress of banana plants using foliar treatments of chitosan nanoparticles (CH-NPs). CH-NPs produced by nanotechnology have been used to enhance tolerance and plant growth under different abiotic stresses, e.g., salinity and drought; however, there is little information available about their effects on banana plants under cold stress. In this study, banana plants were sprayed with four concentrations of CH-NPs—i.e., 0, 100, 200, and 400 mg L−1 of deionized water—and a group that had not been cold stressed or undergone CH-NP treatment was used as control. Banana plants (Musa acuminata var. Baxi) were grown in a growth chamber and exposed to cold stress (5 °C for 72 h). Foliar application of CH-NPs caused significant increases (p < 0.05) in most of the growth parameters and in the nutrient content of the banana plants. Spraying banana plants with CH-NPs (400 mg L−1) increased the fresh and dry weights by 14 and 41%, respectively, compared to the control. A positive correlation was found between the foliar application of CH-NPs, on the one hand, and photosynthesis pigments and antioxidant enzyme activities on the other. Spraying banana plants with CH-NPs decreased malondialdehyde (MDA) and reactive oxygen species (ROS), i.e., hydrogen peroxide (H2O2), hydroxyl radicals (•OH), and superoxide anions (O2•−). CH-NPs (400 mg L−1) decreased MDA, H2O2, •OH, and O2•− by 33, 33, 40, and 48%, respectively, compared to the unsprayed plants. We hypothesize that CH-NPs increase the efficiency of banana plants in the face of cold stress by reducing the accumulation of reactive oxygen species and, in consequence, the degree of oxidative stress. The accumulation of osmoprotectants (soluble carbohydrates, proline, and amino acids) contributed to enhancing the cold stress tolerance in the banana plants. Foliar application of CH-NPs can be used as a sustainable and economically feasible approach to achieving cold stress tolerance.

scholarly journals Cold stress increases reactive oxygen species formation via TRPA1 activation in A549 cells

2015 ◽  
Vol 21 (2) ◽  
pp. 367-372 ◽  
Author(s):  
Wenwu Sun ◽  
Zhonghua Wang ◽  
Jianping Cao ◽  
Haiyang Cui ◽  
Zhuang Ma
Keyword(s):  
Reactive Oxygen Species ◽  
Cold Stress ◽  
A549 Cells ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Reactive Oxygen Species Formation ◽  
Species Formation
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