Anthocyanins, thiols, and antioxidant scavenging enzymes are involved in <i>Lemna gibba</i> tolerance to arsenic

Leão, Gabriela Alves; Oliveira, Juraci Alves de; Felipe, Rafaella Teles Arantes; Farnese, Fernanda dos Santos; Gusman, Grasielle Soares

doi:10.1080/17429145.2013.784815

Cited by 58 publications

(20 citation statements)

References 50 publications

(45 reference statements)

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“…Similarly in Arabidopsis thaliana seedlings, exposure to 60 mg•L -1 IHg induced a 10× increase in anthocyanin content [33]. Arsenic stress increased anthocyanin content in Lemna gibba [31]. To summarize, data in E. nuttallii suggested that both enzymatic and non-enzymatic antioxidant defenses were triggered by MeHg treatments, certainly to cope with an increase of ROS, while IHg treatments resulted in a higher binding in cell walls and decreased chlorophyll content.…”

Section: Pigment Content and Anti-oxidative Stress Enzymesmentioning

confidence: 90%

“…In shoots exposed to 0.1 and 1 µg•L -1 MeHg, we observed a 3.3× and 2.4× increase of POD activity, respectively. Finally, the content of the pigment anthocyanin, a non-enzymatic antioxidant compound (secondary metabolite), was determined because of its role in tolerance to reactive oxygen species (ROS) [31]. An increase of 4.8× to 7.6× at 0.01 and 10 µg•L -1 MeHg vs control of anthocyanin content was observed, while no significant effect on this pigment was measured for IHg when exposed 24h to 0.077 and 77 µg•L -1 IHg vs control (80.6 ± 23.7% and 59.0 ± 7.9%, for 0.077 and 77 µg•L -1 IHg, respectively) [16].…”

Section: Pigment Content and Anti-oxidative Stress Enzymesmentioning

confidence: 99%

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Molecular Effects, Speciation, and Competition of Inorganic and Methyl Mercury in the Aquatic Plant Elodea nuttallii

Beauvais-Flück

Skyllberg

Cosio

2018

Environ. Sci. Technol.

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Mercury (Hg) remains hazardous in aquatic environments because of its biomagnification in food webs. Nonetheless, Hg uptake and impact in primary producers is still poorly understood. Here, we compared the cellular toxicity of inorganic and methyl Hg (IHg and MeHg, respectively) in the aquatic plant Elodea nuttallii. IHg and MeHg regulated contigs involved in similar categories (e.g., energy metabolism, development, transport, secondary metabolism), but MeHg regulated more contigs, supporting a higher molecular impact than IHg. At the organism level, MeHg induced antioxidants, while IHg decreased chlorophyll content. The uptake of Hg and expression of a subset of contigs was subsequently studied in complex media. Measured uptake pointed to a contrasted impact of cell walls and copper (Cu) on IHg and MeHg. Using a speciation modeling, differences in uptake were attributed to the differences in affinities of IHg and MeHg to organic matter in relation to Cu speciation. We also identified a distinct gene expression signature for IHg, MeHg, and Cu, further supporting different molecular toxicity of these trace elements. Our data provided fundamental knowledge on IHg and MeHg uptake in a key aquatic primary producer and confirmed the potential of transcriptomics to assess Hg exposure in environmentally realistic systems.

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Section: Pigment Content and Anti-oxidative Stress Enzymesmentioning

confidence: 90%

Section: Pigment Content and Anti-oxidative Stress Enzymesmentioning

confidence: 99%

Molecular Effects, Speciation, and Competition of Inorganic and Methyl Mercury in the Aquatic Plant Elodea nuttallii

Beauvais-Flück

Skyllberg

Cosio

2018

Environ. Sci. Technol.

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“…For example, when E. camaldulensis species was exposed to 45 μmol/L cadmium there was an increase of carotenoids (related to the tolerance to oxidative stress), and there is also an increase in the thickness of the epidermis and root endoderm according to the increased doses of the metal and the decrease in the thickness of the mesophyll and leaf limb related to the decrease of the photosynthetic capacity [37,51]. The tolerance could be due to some phytocompounds such as anthocyanins, thiols, and antioxidant scavenging enzymes [52]. Furthermore, at 50 mg/kg of Co, there was an increase in nutrient content of tomato plants [53] and increase in plant growth, nutrient content, biochemical content, and antioxidant enzyme activities (catalase) in radish and mung bean [54,55].…”

Section: Plantmentioning

confidence: 99%

Phytoremediation of Polluted Waterbodies with Aquatic plants: Recent Progress on Heavy Metal and Organic Pollutants

Christian¹,

Beniah²

2019

Preprint

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Heavy metals and organic pollutants are ubiquitous environmental pollutants affecting the quality of soil, water and air. Over the past 5 decades, many strategies have been developed for the remediation of polluted water. Strategies involving aquatic plant use are preferable to conventional methods. In this study, an attempt was made to provide a brief review on recent progresses in research and practical applications of phytoremediation for water resources with the following objectives: (1) to discuss the toxicity of toxic chemicals pollution in water to plant, animals and human health (2) to summarise the physicochemical factors affecting removal of toxic chemicals such as heavy metals and organic contaminants in aqueous solutions by aquatic plants; (3) to summarise and compare the removal rates of heavy metals and organic contaminants in aqueous solutions by diverse aquatic plants; and (4) to summarise chemometric models for testing aquatic plant performance. More than 20 aquatic plants specie have been used extensively while duckweed (L. minor), water hyacinth (Eichhornia crassipes), water lettuce (P. stratiotes) are the most common. Overall, chemometrics for performance assessment reported include: Growth rate (GR), Growth rate inhibition (% Inhibition), Metal uptake (MU), translocation/transfer factor (TF), bioconcentration factor (BCF), Percent metal uptake (% MU), Removal capacity (RC) and Tolerance index (TI) while absorption rate have been studied using the sorption kinetics and isotherms models such as pseudo-first-order (PFO), pseudo-second-order (PSO), Freundlich, Langmuir and Temkin. Using modeling and interpretation of adsorption isotherms for performance assessment is particularly good and increases level of accuracy obtained from adsorption processes of contaminant on plant. Conclusion was drawn by highlighting the gap in knowledge and suggesting key future areas of research for scientists and policymakers.

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“…One of the most damaging eff ects of As in plants is oxidative stress caused by an increase in the production of reactive oxygen species (ROS), which may alter the normal metabolism of plants and damage cell membranes, causing inhibition of photosynthesis and growth (Silveira et al 2015) and eventual cell death (Sharma et al 2012). However, plants have developed mechanisms to mitigate these effects using enzymatic and non-enzymatic antioxidants, such as superoxide dismutase (SOD), peroxidases (POXs) and catalases (Gusman et al 2013), as well as anthocyanins (Srivastava et al 2016) and non-protein thiols (Leão et al 2014b).…”

Section: Introductionmentioning

confidence: 99%

Phytoremediation of arsenic-contaminated water: the role of antioxidant metabolism of Azolla caroliniana Willd. (Salviniales)

et al. 2017

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Phytoremediation has proven to be an effi cient technology for removing arsenic (As) from water, but the plants used in this process need to be tolerant to the damage caused by As. Th e toxic eff ect of As on growth and functioning of the antioxidant system was studied in individual plants of Azolla caroliniana exposed to fi ve concentrations of As (0.0, 0.25, 0.5, 1.0 and 1.5 mg L -1 ) for the course of fi ve days. Growth, As absorption, enzymatic activity, total and non-protein thiols and anthocyanin content were assessed. Azolla caroliniana was able to take up large amounts of the pollutant, reaching As concentrations of 386.1 µg g -1 dry weight without saturating the absorption mechanism. Th e tolerance index and the growth of A. caroliniana decreased with the increased As uptake. Superoxide dismutase, peroxidases, catalases and glutathione reductase activities increased at lower doses of As and subsequently declined with higher concentrations, whereas ascorbate peroxidase activity was reduced in all treatments. Unlike the enzymatic defence system, anthocyanin and thiol content increased consistently in all treatments and showed a positive correlation with As concentration. Th erefore, the increased synthesis of non-enzymatic antioxidants is most likely the main factor responsible for the high As tolerance of A. caroliniana.

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Anthocyanins, thiols, and antioxidant scavenging enzymes are involved in Lemna gibba tolerance to arsenic

Cited by 58 publications

References 50 publications

Molecular Effects, Speciation, and Competition of Inorganic and Methyl Mercury in the Aquatic Plant Elodea nuttallii

Molecular Effects, Speciation, and Competition of Inorganic and Methyl Mercury in the Aquatic Plant Elodea nuttallii

Phytoremediation of Polluted Waterbodies with Aquatic plants: Recent Progress on Heavy Metal and Organic Pollutants

Phytoremediation of arsenic-contaminated water: the role of antioxidant metabolism of Azolla caroliniana Willd. (Salviniales)

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