Antioxidant enzyme responses of plants to heavy metal stress

2011 ◽  
Vol 11 (1) ◽  
pp. 55-69 ◽  
Author(s):  
Anwesha M. Bhaduri ◽  
M. H. Fulekar
Keyword(s):  
Heavy Metal ◽  
Antioxidant Enzyme ◽  
Heavy Metal Stress ◽  
Metal Stress

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 Effects of Fly Ash Amended Soil on Biochemical Attributes and Antioxidant Responses of Medicinally Potent Plant Calendula Officinalis

2021 ◽  
Author(s):  
Ayushi Varshney ◽  
Praveen Dahiya ◽  
Sumedha Mohan
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Antioxidant Enzyme ◽  
Biochemical Parameters ◽  
Photosynthetic Pigment ◽  
Heavy Metal Stress ◽  
Metal Stress ◽  
Antioxidant Enzyme Activities ◽  
Calendula Officinalis ◽  
The Impact

Abstract Phytoremediation of fly ash (FA) deposits using metal tolerant plant species has become an important eco-friendly technique for reclamation nowadays. The present study was carried out to determine the impact of FA application on photosynthetic pigments (chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids), biochemical parameters (soluble protein, reducing sugar, nitrate and nitrate reductase (NR) activity), metal accumulation (Fe, Zn, Cu, Co, Cd, Cr, and Mn) and antioxidant defense activity (SOD, CAT, POD, and APX) of Calendula officinalis. With this aim in mind, under pot culture conditions, Calendula officinalis was grown in different combinations of FA and soil which include: Control, 10%, 20%, 40%, 60%, 80%, and 100% FA. The results from the study indicated that the addition of FA (40%) in soil not only improved the physico-chemical properties of soil but also increased the photosynthetic pigment and other biochemical parameters in plants, however, these parameters declined under high FA applications. On the other hand, antioxidant enzyme activities (SOD, CAT, APX and Peroxidase) of Calendula increased with increasing FA application to combat heavy metal stress from fly ash. At high FA applications, antioxidant enzyme levels increased in leaves thereby reflecting heavy metal stress and mitigation of reactive oxygen species.

scholarly journals Salicylic acid in combination with kinetin or calcium ameliorates heavy metal stress in Phaseolus vulgaris plant

2021 ◽  
pp. 100182
Author(s):  
Radwan Khalil ◽  
Samia Haroun ◽  
Fardous Bassyoini ◽  
Aziza Nagah ◽  
Mohammad Yusuf
Keyword(s):  
Heavy Metal ◽  
Salicylic Acid ◽  
Phaseolus Vulgaris ◽  
Heavy Metal Stress ◽  
Metal Stress

Effects of Metal Stress on Visible/Near-Infrared Reflectance Spectra of Vegetation

2011 ◽  
Vol 347-353 ◽  
pp. 2735-2738 ◽  
Author(s):  
Guang Yu Chi ◽  
Yi Shi ◽  
Xin Chen ◽  
Jian Ma ◽  
Tai Hui Zheng
Keyword(s):  
Heavy Metal ◽  
Structural Changes ◽  
Near Infrared ◽  
Leaf Surface ◽  
Spectral Response ◽  
Spectral Characteristics ◽  
Surface Characteristics ◽  
Heavy Metal Stress ◽  
Metal Stress ◽  
Near Infrared Reflectance

Vegetation which suffers from heavy metal stresses can cause changes of leaf color, shape and structural changes. The spectral characteristics of vegetation leaves is related to leaf thickness, leaf surface characteristics, the content of water, chlorophyll and other pigments. So the eco-physiology changes of plants can be reflected by spectral reflectance. Studies on the spectral response of vegetation to heavy metal stress can provide a theoretical basis for remote sensing monitoring of metal pollution in soils. In recent decades, there are substantial amounts of literature exploring the effects of heavy metals on vegetation spectra.

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