Development of antioxidant materials based on Persian gum and Zataria essential oil: modulation of superoxide-producing and nitric oxide-producing enzymes in wheat seedlings

2021 ◽  
pp. 102035
Author(s):  
Maryam Aminizadeh ◽  
Ahmadreza Rahimi ◽  
Fatemeh Sohrabi ◽  
Gholamreza Kavoosi
Keyword(s):  
Nitric Oxide ◽  
Essential Oil ◽  
Wheat Seedlings

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.

Involvement of Nitric Oxide in the Mediation of the Hypotensive Action of the Essential Oil of Mentha × villosa in Normotensive Conscious Rats

Planta Medica ◽  
2002 ◽  
Vol 68 (8) ◽  
pp. 694-699 ◽  
Author(s):  
Saad Lahlou ◽  
Pedro Jorge Caldas Magalhães ◽  
Ricardo Ferreira Lima Carneiro-Leão ◽  
José Henrique Leal-Cardoso
Keyword(s):  
Nitric Oxide ◽  
Essential Oil ◽  
Hypotensive Action ◽  
Conscious Rats

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

Nitric Oxide Alleviates Iron Toxicity by Reducing Oxidative Damage and Growth Inhibition in Wheat (Triticum aestivum L.) Seedlings

2019 ◽  
Vol 5 (01) ◽  
pp. 16-22
Author(s):  
Nalini Pandey ◽  
Laxmi Verma
Keyword(s):  
Oxidative Stress ◽  
Nitric Oxide ◽  
Oxidative Damage ◽  
Sodium Nitroprusside ◽  
Dry Weight ◽  
Triticum Aestivum L ◽  
Tolerance Index ◽  
Promoting Effect ◽  
Wheat Seedlings ◽  
Protein Thiols

Nitric oxide (NO) is an important bioactive signaling molecule in plants which modulates a variety of physiological processes and responses to abiotic and biotic stresses. In this study, the effects of exogenous NO supplied as sodium nitroprusside (SNP) in wheat seedlings under ironinduced oxidative damage was investigated. An appropriate concentration of NO was determined by conducting a preliminary experiment. In solution culture, wheat seeds were grown in the control (100 μM Fe), and toxic Fe (400 μM Fe) levels and the toxic Fe supply was treated with various levels of (50, 100, 200 and 500 μM) sodium nitroprusside (SNP). The results indicated that 400 μM Fe significantly decreased percentage germination, tolerance index, root lengths as well as fresh and dry weight compared to control. Exogenous SNP attenuated the inhibition of wheat seed germination. The promoting effect was most pronounced at 100 μM SNP. The accumulated concentration of iron and active Fe was significantly decreased by SNP treated Fe toxic seedlings. Toxicity of Fe caused oxidative stress by elevating hydrogen peroxide (H2O2), malondialdehyde (MDA) and proline contents in roots of wheat seedlings. One hundred μM SNP counteracted Fe toxicity by reducing the H2O2, MDA and proline contents of toxic Fe exposed seedlings. Meanwhile, application of SNP markedly reduced the activities of superoxide dismutases (SOD), catalases (CAT), peroxidase (POD), ascorbate peroxidases (APX), non protein thiols (NPT) and of glutathione reductase (GR) and increased ascorbate (ASc) compared with Fe toxic treatment alone, thereby indicating the modulation of the antioxidative capacity in the root under Fe stress by NO. The results indicated that the exogenous application of SNP, improved the antioxidant enzymes activity of wheat seedlings against Fe induced oxidative stress.

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