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hydrilla verticillata/antiossidante
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Pagina 1 a partire dal 22 risultati
Effects of ammonium on the antioxidative response in Hydrilla verticillata (L.f.) Royle plants.
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To investigate ammonium toxicity, the submerged plant Hydrilla verticillata (L.f.) Royle was treated with 0.1-3.0mM ammonium for 12h and 4d. After exposure to ammonium for 4d, content of O2(-) and H2O2 increased in leaves of H. verticillata exposed to 3mM ammonium compared with control (0mM NH4Cl),
Effect of variable sulfur supply on arsenic tolerance and antioxidant responses in Hydrilla verticillata (L.f.) Royle.
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In the present study, Hydrilla verticillata plants were exposed to arsenate (AsV; 50 microM) and arsenite (AsIII; 5 microM) under variable S supply: deficient (2 microM S, -S), normal (1 mM S, +S) and excess (2 mM S, +HS). Arsenic accumulation (microg g(-1) dw) in +HS plants was about 2-fold higher
Phytochelatins and antioxidant systems respond differentially during arsenite and arsenate stress in Hydrilla verticillata (L.f.) Royle.
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Serious contamination of aquatic systems by arsenic (As) in different parts of the world calls for the development of an in situ cost-effective phytoremediation technology. In the present investigation, plants of Hydrilla verticillata (L.f.) Royle were exposed to various concentrations of arsenate
Antioxidative response of the three macrophytes Ceratophyllum demersum, Egeria densa, and Hydrilla verticillata to a time dependent exposure of cell-free crude extracts containing three microcystins from cyanobacterial blooms of Lake Amatitlán, Guatemala.
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Microcystins (MCs) produced by cyanobacteria in natural environments are a potential risk to the integrity of ecosystems. In this study, the effects of cyanobacterial cell-free crude extracts from a Microcystis aeruginosa bloom containing three MC-congeners MC-LR, -RR, and -YR at environmental
[Protective effects of exogenous ascorbic acid on antioxidant system in Hydrilla verticillata under Cd2+].
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In this paper, Hydrilla verticillata was cultured in the hoagland solution containing 5 mg L(-1) Cd2+ and different concentration ascorbic acid (AsA) to investigate the protective action of AsA to aquatic plant suffered from heavy metal's stress. The O2 generation rate, H2O2 content, antioxidants
[Effects of different concentration ammonium-n on Hydrilla verticillata antioxidant enzymes under Cd stress].
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In this paper, submersed plant Hydrilla verticillata was cultivated in a 1/10 Hoagland culture medium added with different concentration NH4 + -N (0, 0. 5, 2. 0, 4. 0 mg x L(-1)) and 10 mg x L(-1) cadmium to study the effects of NH4 + -N on H. verticillata growth and its antioxidant enzyme system
Effect of Fluoride on photosynthetic pigment content and antioxidant system of Hydrilla verticillata.
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Fluoride can either inhibit or enhance the growth of aquatic macrophytes, depending upon fluoride concentration and exposure time. To investigate fluoride toxicity, the submerged plant Hydrilla verticillata was treated with various concentrations of fluoride (F) (0, 10, 20 and 40 mg/L) for different
Oxidative stress induced by iron in Hydrilla verticillata (l.f.) Royle: response of antioxidants.
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The effect of iron (FeCl3) on chlorophyll content, lipid peroxidation product, potassium ion leakage (a measure of damage to the permeability barrier), and antioxidants was studied in Hydrilla verticillata. The effect of iron-induced damage to the plant was compared with those of N-ethyl maleimide
Excess Zn alters the nutrient uptake and induces the antioxidative responses in submerged plant Hydrilla verticillata (L.f.) Royle.
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To investigate the effects of zinc (Zn) on aquatic macrophyte, the submerged plant Hydrilla verticillata (L.f.) Royle was cultured in control solution or together with 0.05-30 mg L(-1) Zn(2+) for 7 d. The alterations in nutrient uptake and antioxidative response were assayed. Zn stress increased the
Copper-induced oxidative stress and responses of antioxidants and phytochelatins in Hydrilla verticillata (L.f.) Royle.
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Copper, though essential, is potentially toxic heavy metal at supraoptimal level and has widespread contamination. The present investigation was carried out to study the responses induced by lower as well as higher doses of copper (0.1-25 microM) in an aquatic macrophyte, Hydrilla verticillata
Subcellular accumulation and source of O2- and H2O2 in submerged plant Hydrilla verticillata (L.f.) Royle under NH4+-N stress condition.
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In this study, the effects of excess NH4+-N on the subcellular accumulation of O2- and H2O2 in submerged plant Hydrilla verticillata (L.f.) Royle were investigated using both histochemical and cytochemical methods. Treatments with ≥
Nitric oxide supplementation alleviates ammonium toxicity in the submerged macrophyte Hydrilla verticillata (L.f.) Royle.
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The likely protective effects of nitric oxide (NO) against ammonium toxicity were investigated in the submerged macrophyte Hydrilla verticillata. The plants were subjected to ammonium stress (3mM ammonium chloride) in the presence of sodium nitroprusside (SNP, 10 μM), an NO donor. Treatment with SNP
Zinc supplementation imparts tolerance to arsenite stress in Hydrilla verticillata (L.f.) Royle.
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The present study was aimed to analyze the effects of external Zn supply on arsenic (As) toxicity in Hydrilla verticillata (L.f.) Royle. The plants were exposed to arsenite (AsIII; 10 μM) with or without 50 and 100 μM Zn. The level of As accumulation (μg g-1 dw) after 2 and 4 days was not
Toxic effects of Hydrilla verticillata exposed to toluene, ethylbenzene and xylene and safety assessment for protecting aquatic macrophytes.
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Little information is available about the toxicity of toluene, ethylbenzene and xylene acting on macrophytes, and their toxicity data are rarely used in regulation and criteria decisions. The results extended the knowledge on toxic effects of toluene, ethylbenzene and xylene on aquatic plants. The
Phytotoxicity and accumulation of zinc oxide nanoparticles on the aquatic plants Hydrilla verticillata and Phragmites Australis: leaf-type-dependent responses.
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The phytotoxicity and accumulation of zinc oxide nanoparticles (ZnO NPs) on aquatic plant Hydrilla verticillata and Phragmites australis were investigated using mesocosms. The percentage of dissolved Zn in the ZnO NP treatment solutions was measured along with plant shoot growth, antioxidant enzyme
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