scholarly journals The effect of antimycin A on the intensity of oxidative stress, the level of lipid peroxidation and antioxidant enzyme activities in different organs of wheat (Triticum aestivum L.) seedlings subjected to high temperature

2017 ◽  
Vol 69 (4) ◽  
pp. 743-752
Author(s):  
Anna Batjuka ◽  
Nataļja Skute
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Triticum Aestivum ◽  
High Temperature ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Triticum Aestivum L ◽  
Antioxidant Enzyme Activities ◽  
Antimycin A

scholarly journals Effect of Exogenous Treatment with Nitric Oxide (NO) on Redox Homeostasis in Barley Seedlings (Hordeum vulgare L.) Under Copper Stress

2022 ◽  
Author(s):  
Marouane Ben Massoud ◽  
Oussama Kharbech ◽  
Yathreb Mahjoubi ◽  
Abdelilah Chaoui ◽  
Astrid Wingler
Keyword(s):  
Oxidative Stress ◽  
Nitric Oxide ◽  
Lipid Peroxidation ◽  
Hordeum Vulgare ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Redox Homeostasis ◽  
Copper Stress ◽  
Antioxidant Enzyme Activities ◽  
Cu Toxicity

AbstractThe protective mechanism of nitric oxide (NO) in regulating tolerance to Cu-induced toxicity in shoots of barley (Hordeum vulgare L.) was studied. The experiment consisted of four treatments based on additions to basal nutrient solutions (BNS): control (CTR), Cu (200 µM), SNP (500 µM), and Cu (200 µM) + SNP (500 µM) over a period of 10 days. Treatment with Cu significantly reduced seedling growth and photosynthetic efficiency concomitant with an increase in reactive oxygen species contents, lipid peroxidation markers, and antioxidant enzyme activities, indicating that Cu induced oxidative stress. Furthermore, growth inhibition of Cu-treated plants was associated with a reduction in photosynthetic pigments and maximum photosystem II efficiency as well as a strong decrease in levels of glutathione (GSH) and ascorbate (AsA). Addition of a nitric oxide (NO) donor, sodium nitroprusside (SNP), to the growth medium alleviated Cu toxicity by decreasing Cu uptake and enhancing antioxidant capacity, as indicated by increased contents of GSH and AsA. The application of SNP decreased oxidative stress and lipid peroxidation by suppressing lipoxygenase activity and enhancing some antioxidant enzyme activities. The results obtained indicate the potential of exogenously applied SNP in the management of metal toxicity. Hence, NO generating compounds have potential agronomical applications when cultivating in contaminated areas. Our findings indicate that NO can alleviate Cu toxicity by affecting the antioxidant defense system and maintaining the glutathione-ascorbate cycle status, suggesting that SNP treatment protects proteins against oxidation by regulating the cellular redox homeostasis.

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