Copper-induced oxidative stress and responses of antioxidants and phytochelatins in Hydrilla verticillata (L.f.) Royle

Srivastava, Sudhakar; Mishra, Seema; Tripathi, Rudra Deo; Dwivedi, Sanjay; Gupta, Dharmendra K.

doi:10.1016/j.aquatox.2006.10.006

Cited by 207 publications

(121 citation statements)

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“…However, when present in excess, it becomes toxic and inhibits growth. Previous studies have shown that toxic metal concentrations generally inhibit cell elongation and expansion (Srivastava et al, 2006). The results presented here indicate that excess copper was toxic to L. punctata and L. minor under monoculture or mixed culture conditions.…”

Section: Discussionmentioning

confidence: 48%

“…Our results showed that the activity of SOD tended to be higher at high copper concentrations (Table 3). Some studies also showed an increased activity of this enzyme after an exposure to Cu (Rama Devi and Prasad, 1998;Srivastava et al, 2006). Although SOD could block the increase in the level of O 2− radicals, it could not protect the cell completely since the production of H 2 O 2 could damage the cell.…”

Section: Tablementioning

confidence: 99%

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The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

et al. 2015

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Section: Discussionmentioning

confidence: 48%

Section: Tablementioning

confidence: 99%

The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

et al. 2015

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“…SOD (EC 1.1.5.1.1) activity was assayed using the method of Srivastava et al (2006) APX (EC 1.11.1.11) activity was measured by estimating the rate of ascorbate oxidation (extinction coefficient 2.8 mM -1 cm -1 ). The 3 mL reaction mixture contained 50 mM phosphate buffer (pH 7.0), 0.1 mM H 2 O 2 , 0.5 mM sodium ascorbate, 0.1 mM EDTA and a suitable aliquot of enzyme extract.…”

Section: Stress Indicators and Antioxidant Enzymesmentioning

confidence: 99%

“…The 3 mL reaction mixture contained 50 mM phosphate buffer (pH 7.0), 0.1 mM H 2 O 2 , 0.5 mM sodium ascorbate, 0.1 mM EDTA and a suitable aliquot of enzyme extract. The change in absorbance was monitored at 290 nm (Srivastava et al 2006) and the enzyme activity expressed as units mg -1 protein.…”

Section: Stress Indicators and Antioxidant Enzymesmentioning

confidence: 99%

Copper microlocalisation and changes in leaf morphology, chloroplast ultrastructure and antioxidative response in white lupin and soybean grown in copper excess

2013

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El acceso a la versión del editor puede requerir la suscripción del recurso Abstract The microlocalisation of Cu was examined in the leaves of white lupin and soybean grown hydroponically in the presence of 1.6 or 192 µM Cu, along with its effect on leaf morphology, (ultra)structure and the antioxidative response. The 192 µM dose led to a reduction in the total leaf area and leaf thickness in both species, although more strongly so in white lupin. In the latter species it was also associated with smaller spongy parenchyma cells, and smaller spaces between them, while in the soybean it more strongly reduced the size of the palisade parenchyma and epidermal cells. Energydispersive X-ray microanalysis showed that under Cu excess the metal was mainly localised inside the spongy parenchyma cells of the white lupin leaves, and in the lower epidermis cell walls in those of the soybean. Cu excess also promoted ultrastructural chloroplast alterations, reducing the photosynthetic capacity index and the green area of the leaves, especially in the soybean. Despite this, the soybean appeared to be more tolerant to Cu excess than the white lupin, perhaps because i) soybean accumulates 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 Certainly, marked differences in Cu tolerance have been observed in different plants.While

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“…The plantlets were rinsed with 0.01 M NaOCl for 30 s to prevent algal growth. Before metal treatment, plants were acclimatized for 5 days in laboratory conditions (160 lmol m 22 s 21 light with 16 h photoperiod at 25 6 18C) in 10% Hoagland's solution (Hoagland and Arnon, 1950;Srivastava et al, 2006). At the end of this period, uniform and healthy plants were collected and put into 10% Hoagland's solution containing 1, 10, and 100 mg L 21 Fe 31 or Cu 21 (added in the form of FeCl 3 Á6H 2 O and CuSO 4 Á5H 2 O).…”

Section: Plant Materials and Treatment Conditionsmentioning

confidence: 99%

Effect of excess iron and copper on physiology of aquatic plant Spirodela polyrrhiza (L.) Schleid

Xing

Huang

Liu

2009

Environmental Toxicology

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To elucidate effect of chemical reagents addition on growth of aquatic plants in restoration of aquatic ecosystem, Spirodela polyrrhiza (L.) Schleid was used to evaluate its physiological responses to excess iron (Fe 31 ) and copper (Cu 21 ) in the study. Results showed that accumulation of iron and copper both reached maximum at 100 mg L 21 iron or copper after 24 h short-term stress, but excess iron and copper caused plants necrosis or death and colonies disintegration as well as roots abscission at excess metal concentrations except for 1 mg L 21 iron. Significant differences in chlorophyll fluorescence (Fv/Fm) were observed at 1-100 mg L 21 iron or copper. The synthesis of chlorophyll and protein as well as carbohydrate and the uptake of phosphate and nitrogen were inhibited seriously by excess iron and copper. Proline content decreased with increasing iron or copper concentration, however, MDA content increased with increasing iron or copper concentration. # 2009 Wiley Periodicals, Inc. Environ Toxicol 25: 103-112, 2010.

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Copper-induced oxidative stress and responses of antioxidants and phytochelatins in Hydrilla verticillata (L.f.) Royle

Cited by 207 publications

References 54 publications

The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

Copper microlocalisation and changes in leaf morphology, chloroplast ultrastructure and antioxidative response in white lupin and soybean grown in copper excess

Effect of excess iron and copper on physiology of aquatic plant Spirodela polyrrhiza (L.) Schleid

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