Toxicity of copper on marine diatoms, Chaetoceros calcitrans and Nitzchia closterium from Cochin estuary, India

Neethu, K; Saranya, K; Krishna, N.; Praved, P. Hari; Aneesh, Balakrishna Pillai; Nandan, S. Bijoy; Marigoudar, Shambanagouda Rudragouda

doi:10.1007/s10646-021-02410-9

Cited by 9 publications

(3 citation statements)

References 50 publications

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“…Alterations in chlorophyll and carotenoid content after Cu exposure was also reported for two other marine species: Chaetoceros calcitrans and Nitzchia closterium. C. calcitrans was found to be the most sensitive one, showing also an increase in activity of antioxidant enzymes such as catalase (CAT) and APX [63]. Cu can also determine cytoplasmic and chloroplast vacuolization in algal cells, as demonstrated in the diatom S. costatum; this metal entered the cell and was partially located in spherical bodies found within the vacuoles [55].…”

Section: Detrimental Effects Of Cu At High Concentrationsmentioning

confidence: 97%

Copper Effect on Microalgae: Toxicity and Bioremediation Strategies

Cavalletti

Romano

Esposito

et al. 2022

Toxics

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Microalgae are increasingly recognised as suitable microorganisms for heavy metal (HM) removal, since they are able to adsorb them onto their cell wall and, in some cases, compartmentalise them inside organelles. However, at relatively high HM concentrations, they could also show signs of stress, such as organelle impairments and increased activities of antioxidant enzymes. The main aim of this review is to report on the mechanisms adopted by microalgae to counteract detrimental effects of high copper (Cu) concentrations, and on the microalgal potential for Cu bioremediation of aquatic environments. Studying the delicate balance between beneficial and detrimental effects of Cu on microalgae is of particular relevance as this metal is widely present in aquatic environments facing industrial discharges. This metal often induces chloroplast functioning impairment, generation of reactive oxygen species (ROS) and growth rate reduction in a dose-dependent manner. However, microalgae also possess proteins and small molecules with protective role against Cu and, in general, metal stress, which increase their resistance towards these pollutants. Our critical literature analysis reveals that microalgae can be suitable indicators of Cu pollution in aquatic environments, and could also be considered as components of eco-sustainable devices for HM bioremediation in association with other organisms.

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Section: Detrimental Effects Of Cu At High Concentrationsmentioning

confidence: 97%

Copper Effect on Microalgae: Toxicity and Bioremediation Strategies

Cavalletti

Romano

Esposito

et al. 2022

Toxics

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“…In the experiment presented here, at concentrations of 2•10 −5 g•dm 3 and 2•10 −3 g•dm 3 , the presence of copper resulted in a 57% reduction in the abundance of E. paludosa compared to the control solution after seven days, while no representatives of C. closterium were observed. In tests conducted on microalgae isolated from the Cochin estuary in India, it was shown that the EC 50 for the diatom Nitzschia closterium (synonym of Cylindrotheca closterium) was 2.045•10 −6 g•dm −3 [92]. In tests on freshwater communities [80] at a concentration of 1.5•10 −5 g•dm −3 copper ions, a significant change in community structure was observed with a marked decrease in the abundance of the diatoms Synedra ulna and Achnanthes minutissima after seven days of testing.…”

Section: Response At Population Levelmentioning

confidence: 99%

Are Toxic Substances Always Toxic? Case Studies of Different Organismal Responses Based on Brackish-Water Microphytobenthic Communities from the Baltic Sea

Sylwestrzak,

Zgrundo

2023

Applied Sciences

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In this manuscript, we present the results of ecotoxicological tests conducted on the Baltic microphytobenthos community consisting largely of cosmopolitan species showing the responses at the community (taxonomic composition and structure), population (abundance), and cellular (chloroplast shape) levels. The tests were carried out for three chemicals with different modes of action on photosynthetic organisms, i.e., copper (II) chloride (at concentrations of 2·10−5 g·dm3 and 2·10−3 g·dm−3), glyphosate in the form of Roundup® (concentrations ranging from 4.2·10−2 to 8.5 g·dm−3), and the ionic liquid [BMIM]Cl (at concentrations of 1.13·10−3 g·dm−3 and 1.75·10−2 g·dm−3). The results of the study indicate that the responses of microphytobenthos at each level analysed are highly variable and difficult to predict a priori based on experiments performed on single strains. In addition, it was shown that microphytobenthic communities are relatively resistant to the substances tested, which is due to taxonomic richness and the resulting potential for substitution of sensitive taxa by more resistant taxa. The results obtained in the tests also indicate that the number of cells of individual taxa can remain at a similar level or increase over short periods of time despite the deformation of chloroplasts in a numerous group of cells.

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“…However, the response depends on the organisms. There are studies that report a decrease in carbohydrates to Eisenia foetida [ 77 ] and to Chaetoceros calcitrans and Nitzchia closterium [ 78 ], as a consequence of the exposure to low concentrations of a fluorinated herbicide (oxyfluorfen). Other studies highlight an increase in the glucose levels on Thalassiosira weissflogii after exposure to copper and oxyfluorfen [ 18 ] and the accumulation of non-structural carbohydrates, at high levels of copper on Citrus grandis and Citrus sinensis [ 79 ].…”

Section: Introductionmentioning

confidence: 99%

The Lethal and Sub-Lethal Effects of Fluorinated and Copper-Based Pesticides—A Review

Mesquita

Gonçalves

2023

IJERPH

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In recent decades, pollution levels have increased, mainly as a result of the intensive anthropogenic activities such industrial development, intensive agricultural practices, among others. The impact of metals and organic contaminants is, nowadays, a great concern to the scientific and political communities. Copper compounds are the main sold pesticides in Europe, as well as herbicides, including glyphosate. Diphenyl ethers are the second ones most sold. Glyphosate and copper compounds are intensively studied, but the opposite is seen in the case of diphenyl ethers, including fluorinated pesticides (e.g., oxyfluorfen). Some research has been performed to increase the knowledge about these contaminants, daily inputted on the aquatic systems and with dangerous effects at physical and biochemical levels on the organisms. A wide range of biomarkers (e.g., growth, survival, reproductive success, enzymatic activity, lipid metabolism) has been applied to determine the potential effects in many species. This review intends to: (a) perform a compilation of the knowledge in previous research about the action mode of organic (fluorinated-based herbicide) and inorganic (copper-based pesticides) contaminants; (b) carry out an information survey about the lethal and sub-lethal effects of the fluorinated-based pesticides, namely the oxyfluorfen and the copper-based pesticides, on aquatic species from different trophic levels, according to in vitro and in vivo studies; (c) understand the impact of oxyfluorfen and copper-based pesticides, considering their effects reported in in vitro studies and, simultaneously, the authorized concentrations by legal organizations and the effective concentrations of each pollutant found in the environment. The literature analyzed revealed noxious effects of Cu and oxyfluorfen to aquatic organisms, including freshwater and marine species, even when exposed to the reference as well as to environmental concentrations, thus highlighting the importance of more monitoring and ecotoxicological studies, to chemical pollutants and different species from different ecological niches, to sustain and improve the legislation.

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Toxicity of copper on marine diatoms, Chaetoceros calcitrans and Nitzchia closterium from Cochin estuary, India

Cited by 9 publications

References 50 publications

Copper Effect on Microalgae: Toxicity and Bioremediation Strategies

Copper Effect on Microalgae: Toxicity and Bioremediation Strategies

Are Toxic Substances Always Toxic? Case Studies of Different Organismal Responses Based on Brackish-Water Microphytobenthic Communities from the Baltic Sea

The Lethal and Sub-Lethal Effects of Fluorinated and Copper-Based Pesticides—A Review

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