Nitric oxide modulates antioxidant defense and the methylglyoxal detoxification system and reduces salinity-induced damage of wheat seedlings

2011 ◽  
Vol 5 (4) ◽  
pp. 353-365 ◽  
Author(s):  
Mirza Hasanuzzaman ◽  
Mohammad Anwar Hossain ◽  
Masayuki Fujita
Keyword(s):  
Nitric Oxide ◽  
Antioxidant Defense ◽  
Wheat Seedlings ◽  
Detoxification System

Salicylic acid and nitric oxide increase photosynthesis and antioxidant defense in wheat under UV-B stress

2016 ◽  
Vol 60 (4) ◽  
pp. 686-694 ◽  
Author(s):  
F. Yan ◽  
Y. Liu ◽  
H. Sheng ◽  
Y. Wang ◽  
H. Kang ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Salicylic Acid ◽  
Antioxidant Defense

CO2 laser enhances the chilling tolerance of wheat seedlings by stimulating NO synthesis

2016 ◽  
Vol 96 (5) ◽  
pp. 796-807
Author(s):  
Yi-ping Chen ◽  
Qiang Liu ◽  
Dong Chen
Keyword(s):  
Nitric Oxide ◽  
Laser Irradiation ◽  
Sodium Tungstate ◽  
Chilling Stress ◽  
Chilling Tolerance ◽  
The Other ◽  
Control Group ◽  
Wheat Seedlings ◽  
Oxide Synthase ◽  
Protein Treatment

To investigate the mechanism by which laser irradiation enhances the chilling tolerance of wheat seedlings, seeds were exposed to different treatments, and biochemical parameters were measured. Compared with the control group, chilling stress (CS) led to an increase in the concentrations of malondialdehyde (MDA) and H2O2, and decreases in the activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), catalase (CAT), peroxidase (POD), and nitric oxide synthase (NOS), and the concentrations of nitric oxide (NO) and protein. Treatment with 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (PTIO), sodium tungstate (ST), and NG-nitro-L-arginine methyl ester (L-NAME) followed by CS resulted in further increases in the concentrations of MDA and H2O2 and further decreases in the other parameters. However, treatment with PTIO, ST, and L-NAME followed by laser irradiation had the opposite effects on these parameters. When the seeds were treated with PTIO, ST, and L-NAME followed by laser and CS, the concentrations of MDA and H2O2 were significantly lower and the other parameters were higher than in the PTIO, ST, and L-NAME plus CS groups. These results suggest that CO2 laser irradiation enhances the chilling tolerance of wheat seedlings by stimulating endogenous NO synthesis.

scholarly journals Molecular Role of Nitric Oxide in Secondary Products Production in Ginkgo biloba Cell Suspension Culture

2015 ◽  
Vol 43 (1) ◽  
pp. 12-18 ◽  
Author(s):  
Hossam Saad EL-BELTAGI ◽  
Osama K. AHMED ◽  
Adel E. HEGAZY
Keyword(s):  
Nitric Oxide ◽  
Ginkgo Biloba ◽  
Antioxidant Defense ◽  
Nitric Oxide Donor ◽  
Peat Moss ◽  
Defense Enzymes ◽  
Secondary Products ◽  
Equal Concentration ◽  
Shoot Height ◽  
Antioxidant Defense Enzymes

Effects of sodium nitroprusside (SNP; nitric oxide donor) treatment on the enhancement of secondary metabolites production, oxidative stress mediators (O2-.) accumulation and antioxidant defense enzymes of Ginkgo biloba callus culture was investigated. On one hand, the obtained data showed a highly metabolic modification of chemical constituents, PAL activity and various antioxidant defense enzymes (APX, SOD), which gradually increased in response to SNP treatments. On the other hands the high NO levels significantly increased the accumulation of various oxidative burst of O2-.. MS basal medium supplemented with casein hydrolase (500 mg/L), NAA and BA at equal concentration (0.5 mg/L) recorded the highest number of regenerated shoots (4.81 cm) and shoot height (4.96 cm) as well as root number (2.25 cm) and root length (4.5 cm). The highest survival (40 %) was shown in acclimatization on the mixture containing sand, peat moss and vermiculite (1: 1: 1, v/v/v), which significantly confirmed and reflected the variation in survival percentage. Meanwhile, higher treatment (500 μM) of NO positively enhanced secondary products accumulation of total tannins, saponins, phenols and total flavonoids in G. biloba callus culture.

scholarly journals Seed Treatment with Trichoderma longibrachiatum T6 Promotes Wheat Seedling Growth under NaCl Stress Through Activating the Enzymatic and Nonenzymatic Antioxidant Defense Systems

2019 ◽  
Vol 20 (15) ◽  
pp. 3729 ◽  
Author(s):  
Shuwu Zhang ◽  
Bingliang Xu ◽  
Yantai Gan
Keyword(s):  
Salt Stress ◽  
Antioxidant Defense ◽  
Wheat Seedling ◽  
Nacl Stress ◽  
Ros Scavenging ◽  
Wheat Seedlings ◽  
Defense Systems ◽  
Antioxidant Defense Systems ◽  
Scavenging Enzymes ◽  
Different Levels

Salt stress is one of the major abiotic stresses limiting crop growth and productivity worldwide. Species of Trichoderma are widely recognized for their bio-control abilities, but little information is regarding to the ability and mechanisms of their promoting plant growth and enhancing plant tolerance to different levels of salt stress. Hence, we determined (i) the role of Trichoderma longibrachiatum T6 (TL-6) in promoting wheat (Triticum aestivum L.) seed germination and seedling growth under different levels of salt stress, and (ii) the mechanisms responsible for the enhanced tolerance of wheat to salt stress by TL-6. Wheat seeds treated with or without TL-6 were grown under different levels of salt stress in controlled environmental conditions. As such, the TL-6 treatments promoted seed germination and increased the shoot and root weights of wheat seedlings under both non-stress and salt-stress conditions. Wheat seedlings with TL-6 treatments under different levels of NaCl stress increased proline content by an average of 11%, ascorbate 15%, and glutathione 28%; and decreased the contents of malondialdehyde (MDA) by an average of 19% and hydrogen peroxide (H2O2) 13%. The TL-6 treatments induced the transcriptional level of reactive oxygen species (ROS) scavenging enzymes, leading to the increases of glutathione s-transferase (GST) by an average of 17%, glutathione peroxidase (GPX) 16%, ascorbate peroxidase (APX) 17%, glutathione reductase (GR) 18%, dehydroascorbate reductase (DHAR) 5%. Our results indicate that the beneficial strain of TL-6 effectively scavenged ROS under NaCl stress through modulating the activity of ROS scavenging enzymes, regulating the transcriptional levels of ROS scavenging enzyme gene expression, and enhancing the nonenzymatic antioxidants in wheat seedling in response to salt stress. Our present study provides a new insight into the mechanisms of TL-6 can activate the enzymatic and nonenzymatic antioxidant defense systems and enhance wheat seedling tolerance to different levels of salt stress at physiological, biochemical and molecular levels.

Hydrogen peroxide and nitric oxide mediate K+/Na+ homeostasis and antioxidant defense in NaCl-stressed callus cells of two contrasting poplars

2010 ◽  
Vol 103 (2) ◽  
pp. 205-215 ◽  
Author(s):  
Jian Sun ◽  
Lisi Li ◽  
Meiqin Liu ◽  
Meijuan Wang ◽  
Mingquan Ding ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Hydrogen Peroxide ◽  
Antioxidant Defense

Functional Interaction of ROS and Nitric Oxide during Induction of Heat Resistance of Wheat Seedlings by Hydrogen Sulfide Donor

2020 ◽  
Vol 67 (4) ◽  
pp. 653-660
Author(s):  
Yu. V. Karpets ◽  
Yu. E. Kolupaev ◽  
A. A. Lugovaya ◽  
N. V. Shvidenko ◽  
M. A. Shkliarevskyi ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Hydrogen Sulfide ◽  
Heat Resistance ◽  
Functional Interaction ◽  
Wheat Seedlings
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