Assessment of five live-cell characteristics in periphytic diatoms as a measure of copper stress

Park, Ji‐Hae; Lee, Hojun; Depuydt, Stephen; Han, Taejun; Pandey, Lakshman

doi:10.1016/j.jhazmat.2020.123113

Cited by 15 publications

(6 citation statements)

References 45 publications

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“…In this context, Pandey & Bergey (2018) found significantly higher percentages of lipid droplets in diatoms exposed to trace metal contamination, with Cu resulting more toxic than Zn. The same results were recently obtained by Park et al (2020) who observed a significant increase in lipid bodies volume in the genera Amphora Ehrenberg ex Kützing and Nitzschia Hassall, as response to Cu contamination. Another study statistically confirmed a positive correlation between trace metal contamination (especially Pb and Se) and lipid bodies production in Gomphonema pseudoaugur Lange-Bertalot, which also resulted as one of the most resistant species in communities exposed to such impairment (Gautam et al, 2017).…”

Section: Introductionsupporting

confidence: 88%

Looking back, looking forward: a review of the new literature on diatom teratological forms (2010–2020)

et al. 2021

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Over the last years, issues concerning diatom teratological forms and environmental stress have received growing interest within the scientific community. Publications on this topic dated back to 1890 and were summarized in a review published in 2009 by the journal Hydrobiologia, accounting for high citation rates (i.e. 117 citations Scopus and 232 citations Google Scholar, October 2020). This wide interest stimulates the authors to further unravel teratological forms significance in the light of the most recent publications (2010–2020). Diatom teratological forms are one of the best individual-level biomarkers since they provide a rapid response to several environmental stressors, including new emerging pollutants. The mechanisms involved in teratological valve likely involve both cytoskeleton and silicon metabolic pathway impairments. However, teratologies do not seem to weaken the reproduction capacity and viability of the affected individuals. We recognized eight types of teratologies as involving different parts of the valve, depending on genus. In order to summarize the information obtained by several years of research, we suggest a four-step procedure aimed at providing a theoretical pathway that researchers should follow to better explain results obtained in next-future studies and representing a starting point for the development of an environmental index based on teratological forms.

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Section: Introductionsupporting

confidence: 88%

Looking back, looking forward: a review of the new literature on diatom teratological forms (2010–2020)

et al. 2021

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“…environmental factors (Pandey et al, 2020), on the live features of the six diatom groups (Navicula, Nitzschia, Pinnularia Amphora, Achnanthes, and Diploneis).…”

Section: Metalsmentioning

confidence: 99%

Interactive effects of metal and metalloids on diatom motility and protoplasmic conditions

Sangeeta

Pandey

Negi

et al. 2023

Preprint

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Metal and metalloid contamination in the waterbodies and its undesirable effect on the residing diatom communities is a problem of global concern. In the present study, the effect of metals (Fe and Zn) and metalloids (As and Hg) was examined (for 15 days) in the motility and protoplasmic content of different live diatom genera under laboratory conditions. Under Hg treatment, the % motile frustules in the six diatom genera lies between 2–5% after one day of exposure, while under As treatment value lies between 30–80%. In contrast, under Zn treatment % motile frustules in the six diatom genera lie between 60–80% after one day of exposure, while under Fe treatment value lies between 40–80%. However, after 15 days of exposure to Hg, the % motile frustules in the six diatom genera lies between 0–3%, while under As treatment value lies between 5–20%. In contrast, under Zn treatment % of motile frustules in the six diatom genera lies between 10–40% after one day of exposure, while under Fe treatment value lies between 10–20%. Based on the above results, the toxicity trends of metals and metalloids showed the following: Hg > As > Fe > Zn. Based on correlation ship analysis, it is found that % motile frustules in different diatom genera showed an inverse relationship with the % reduction in the protoplasmic content of the live cells i.e., the higher the value of the reduction in protoplasmic content lower will be the % motile frustules in the community. Based on obtained results, we can conclude that motility in live diatoms is the highly sensitive endpoint to assess the impact of metal and metalloid contamination in the water bodies. However, in comparison to metals, diatoms are more sensitive to the metalloid’s exposure, especially for Hg. Finally, we conclude that % motile diatom frustules in the community is a highly sensitive, quick, and easy-to-assess biomonitoring tool for assessing the metal and metalloid contamination in the water bodies.

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“…Antoni et al [ 104 ] found big LB in diatom cells treated with Zn compared to the control ones, and found that AgNP enhanced LB in Thalassiosira sp [ 105 ]. On the other hand [ 106 ], they observed no increase in LB in diatoms treated with Pb. [ 107 ].…”

Section: Diatoms Silica Shells As Robust Nanomaterials To Treat Heavy Metals In Waste Watermentioning

confidence: 99%

“…This could be helpful in economical harvest of lipid/biofuel from diatoms also known as Diafuel TM [ 109 ], unlike the difficulties faced by researchers in optimizing the economical yet viable way of harvesting biofuel from diatoms using centrifugation, pulse electric field and resonance energies [ 110 ]. Besides teratological changes in diatoms there was decrease in chlorophyll pigments on exposure to trace metals [ 106 , 111 , 112 ], although it increased in some cases [ 113 ] whereas no changes were observed in many other cases [ 114 ]. Not limiting to this there is an alteration in the physiology as well organ structure of diatom on exposure to heavy metals.…”

Section: Diatoms Silica Shells As Robust Nanomaterials To Treat Heavy Metals In Waste Watermentioning

confidence: 99%

Diatom microalgae as smart nanocontainers for biosensing wastewater pollutants: recent trends and innovations

Khan

Rai²,

Ahirwar

et al. 2021

Bioengineered

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Microalgae have been recognized as one of the most efficient microorganisms to remediate industrial effluents. Among microalgae diatoms are silica shelled unicellular eukaryotes, found in all types of water bodies and flourish very well even in wastewater. They have their silica cell wall made up of nano arrayed pores arranged in a uniform fashion. Therefore, they act as smart nanocontainers to adsorb various trace metals, dyes, polymers, and drugs which are hazardous to human as well to aquatic life. The beautiful nanoarchitecture in diatoms allows them to easily bind to ligands of choice to form a nanocomposite structure with the pollutants which can be a chemical or biological component. Such naturally available diatom nanomaterials are economical and highly sensitive compared to manmade artificial silica nanomaterials to help in facile removal of the toxic pollutants from wastewater. This review is thus focused on employing diatoms to remediate various pollutants such as heavy metals, dyes, hydrocarbons detected in the wastewater. It also includes different microalgae as biosensors for determination of pollutants in effluents and the perspectives for nanotechnological applications in the field of remediating pollutants through microalgae. The review also discusses in length the hurdles and perspectives of employing microalgae in wastewater remediation.

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Assessment of five live-cell characteristics in periphytic diatoms as a measure of copper stress

Cited by 15 publications

References 45 publications

Looking back, looking forward: a review of the new literature on diatom teratological forms (2010–2020)

Looking back, looking forward: a review of the new literature on diatom teratological forms (2010–2020)

Interactive effects of metal and metalloids on diatom motility and protoplasmic conditions

Diatom microalgae as smart nanocontainers for biosensing wastewater pollutants: recent trends and innovations

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