Effects of TiO 2 nanoparticles on the aquatic plant Spirodela polyrrhiza : Evaluation of growth parameters, pigment contents and antioxidant enzyme activities

2018 ◽  
Vol 64 ◽  
pp. 130-138 ◽  
Author(s):  
Ali Movafeghi ◽  
Alireza Khataee ◽  
Mahboubeh Abedi ◽  
Roshanak Tarrahi ◽  
Mohammadreza Dadpour ◽  
...  
Keyword(s):  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Aquatic Plant ◽  
Growth Parameters ◽  
Antioxidant Enzyme Activities ◽  
Spirodela Polyrrhiza ◽  
Pigment Contents

scholarly journals Sodium Nitroprusside Mitigates the Inhibitory Effect of Salt and Heavy Metal Stress on Lupine Yield and Downregulates Antioxidant Enzyme Activities

2020 ◽  
Vol 73 (3) ◽  
Author(s):  
Amira Hassanein ◽  
Nihal Esmail ◽  
Hanan Hashem
Keyword(s):  
Heavy Metal ◽  
Sodium Nitroprusside ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Glutathione Transferase ◽  
Growth Parameters ◽  
Foliar Spray ◽  
Heavy Metal Stress ◽  
Metal Stress ◽  
Antioxidant Enzyme Activities

This study was conducted to investigate the effects of sodium nitroprusside (SNP) on antioxidant enzyme activities in <em>Lupinus </em><em>albus </em>subsp. <em>termis </em>(Forssk.) Ponert plants subjected to salt and heavy metal stress. Foliar spray of SNP (0.4 and 0.6 mM) was used as a nitric oxide (NO) donor to treat lupine plants grown under different levels of salinity (0, 75, and 150 mM NaCl) and nickel (Ni) stress (100 and 150 mM Ni sulfate). Growth parameters and yield as well as total phenols, flavonoids, and antioxidant enzyme activities (including those of superoxide dismutase, peroxidase, ascorbate peroxidase, catalase, and glutathione transferase) in NO-treated and untreated plants grown under normal or salt/heavy metal  stress conditions were determined. We found that exogenously applied SNP effectively mitigated the inhibitory effects of salinity and Ni stresses on all measured growth parameters and yield components of lupine plants. In addition, NO downregulated antioxidant enzyme activities, which proved to be a good indicator reflecting changes in the oxidative status of lupine plants in response to SNP, salt, and Ni sulfate treatments.

scholarly journals Effect of Pyrazosulfuron-Methyl on the Photosynthetic Characteristics and Antioxidant Systems of Foxtail Millet

2021 ◽  
Vol 12 ◽  
Author(s):  
Ke Ma ◽  
Weili Zhang ◽  
Liguang Zhang ◽  
Xiaoyong He ◽  
Yu Fan ◽  
...  
Keyword(s):  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Field Experiments ◽  
Photosynthetic Pigment ◽  
Foxtail Millet ◽  
Antioxidant Systems ◽  
Antioxidant Enzyme Activities ◽  
Gas Exchange Parameters ◽  
Chlorophyll Fluorescence Parameters ◽  
Pigment Contents

Foxtail millet (Setaria Italica L.) plays a principal role in food security in Africa and Asia, but it is sensitive to a variety of herbicides. This study was performed to clarify whether pyrazosulfuron-methyl can be used in foxtail millet fields and the effect of pyrazosulfuron-methyl on the photosynthetic performance of foxtail millet. Two foxtail millet varieties (Jingu 21 and Zhangzagu 10) were subjected to five doses (0, 15, 30, 60, and 120 g ai ha−1) of pyrazosulfuron-methyl in pot and field experiments. The plant height, leaf area, stem diameter, photosynthetic pigment contents, gas exchange parameters, chlorophyll fluorescence parameters, antioxidant enzyme activities, and antioxidant contents at 7 and 15 days after pyrazosulfuron-methyl application, and the yield of foxtail millet were measured. The results suggested that pyrazosulfuron-methyl inhibited the growth of foxtail millet and reduced the photosynthetic pigment contents, photosynthetic rate, and photosynthetic system II activity. Similarly, pyrazosulfuron-methyl decreased the antioxidant enzyme activities and antioxidant contents. These results also indicated that the toxicity of pyrazosulfuron-methyl to foxtail millet was decreased gradually with the extension of time after application; however, the foxtail millet yield was still significantly reduced. Therefore, pyrazosulfuron-methyl is not recommended for application in foxtail millet fields.

scholarly journals Antioxidant Enzyme Activities Correlated with Growth Parameters of Wheat Sprayed with Silver and Gold Nanoparticle Suspensions

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1494
Author(s):  
Abdul Manaf ◽  
Xiukang Wang ◽  
Fatima Tariq ◽  
Hafiz Muhammad Jhanzab ◽  
Yamin Bibi ◽  
...  
Keyword(s):  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Growth Parameters ◽  
Nutrient Use Efficiency ◽  
Antioxidant Enzyme Activities ◽  
Guaiacol Peroxidase ◽  
Au Nps ◽  
Chlorophyll Contents ◽  
Nutrient Use ◽  
Metabolic Activities

Application of nanotechnology is crucial for a sustainable increase in food production to cope with the increasing food demand of the burgeoning population. Wheat production has to increase significantly for food security in Pakistan with the help of nanotechnology. In biological systems, utilization of nanoparticles has been increased due to their growth-promoting effects on germination, photosynthetic attributes, nutrient use efficiency and metabolic activities. An experiment was conducted with the objective to establish a relationship between growth parameters and antioxidant enzyme activity in response to silver (Ag) and gold (Au) nanoparticles (NPs). Application of Ag (20 mg/L) and Au NPs (10 mg/L) significantly enhanced the antioxidant enzyme activities of ascorbate peroxidase, catalase and guaiacol peroxidase. Consequently, growth parameters: fresh and dry biomass, leaf area, chlorophyll (a, b) and total chlorophyll contents, also increased significantly. These results suggest that application of Ag and Au NPs has the potential to promote wheat growth through enhancing the antioxidant enzyme activities.

Sign in / Sign up

Export Citation Format

Share Document