Zinc-induced stress on cells of<i>Halamphora luciae</i>(Bacillariophyceae)

Antoni, Julieta; Daglio, Yasmín; Areco, María Mar; Rodríguez, María Cecilia

doi:10.1080/09670262.2020.1758961

Cited by 3 publications

(6 citation statements)

References 96 publications

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“…and also for the synthesis of significant components such as nucleic acid and proteins (Ismaiel et al 2018 ; Nowicka 2022 ; Sun et al 2021 ). Other studies have shown that the exponential growth rate of the green alga Chlamydomonas reinhardtii and the diatom Halamphora luciae was significantly ( P < 0.05) reduced only at the higher tested concentration of Cu (100 µM) and Zn (120 µM) (Antoni et al 2021 ; Luis et al 2006 ), which is consistent with our results. Moreover, Mao et al ( 2022 ) showed that the growth of the green alga Chlorella thermophila and the blue-green alga Leptolyngbya sp.…”

Section: Discussionsupporting

confidence: 93%

“…The duration of exposure is another important factor that may affect the survival of algae to stress. The exposure to stress may be divided into two phases; acute (short phase) and chronic (long phase) (Ajitha et al 2019 ; Antoni et al 2021 ). Usually the metabolic activity of stressed algae increased under the acute phase to resist harsh conditions including high ROS production.…”

Section: Discussionmentioning

confidence: 99%

“…The increased activity of SOD (in addition to other antioxidants) in different algae of Cyanophyta, Chlorophyta, Rhodophyta, and Bacillariophyta under heavy metal and salinity stress has been reported in the literature. However, high doses of heavy metals or salts and/or prolonged exposure may lower the SOD activity (Antoni et al 2021 ; Nowicka 2022 ; Önem et al 2018 ; Pietryczuk et al 2014 ; Zhao et al 2022 ). Yet, despite the studies that highlight the essential role of FeSOD under different heavy metals and salinity stress (Mallik et al 2011 ; Okamoto et al 2001 ; Pinto et al 2003 ), further investigation is needed to identify, and discriminate between the SOD isoforms present in different eukaryotic algae and to compare their roles under environmental stress.…”

Section: Introductionmentioning

confidence: 99%

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Antioxidant enzymes of Pseudochlorella pringsheimii under two stressors: variation of SOD Isoforms activity

Ismaiel

Piercey‐Normore

2023

J Plant Res

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Algae are always facing the challenge of exposure to different stress conditions, therefore raising challenges of adaptation for survival. In this context, the growth and the antioxidant enzymes of the green stress-tolerant alga Pseudochlorella pringsheimii were investigated under two environmental stresses viz. iron and salinity. The number of algal cells was moderately increased by iron treatment in the range of 0.025–0.09 mM of iron, yet, the number of cells decreased at high iron concentrations (0.18 to 0.7 mM Fe). Furthermore, the different NaCl concentrations (8.5–136.0 mM) had an inhibitory effect on the algal cell number, compared to the control.The superoxide dismutase (SOD) showed three isoforms namely; Mn, Fe, and Cu/Zn SOD. The in gel and in vitro (tube-test) activities of FeSOD were higher compared with the other SOD isoforms. The activity of total SOD and its isoforms increased significantly by the different concentrations of Fe and non-significantly by NaCl. The maximum SOD activity was recorded at 0.7 mM Fe (67.9% above control). The relative expression of FeSOD was high under iron and NaCl at 8.5 and 34 mM, respectively. However, FeSOD expression was reduced at the highest NaCl tested concentration (136 mM). In addition, the antioxidant enzyme activity of catalase (CAT) and peroxidase (POD) were accelerated by increasing iron and salinity stress which indicates the essential role of these enzymes under stress. The correlation between the investigated parameters was also investigated. A highly significant positive correlation between the activity of total SOD and its isoforms, and with the relative expression of FeSOD was observed.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Antioxidant enzymes of Pseudochlorella pringsheimii under two stressors: variation of SOD Isoforms activity

Ismaiel

Piercey‐Normore

2023

J Plant Res

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“…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). Again, Antoni et al (2020) observed bigger lipid bodies in cells treated with Zn than control ones. Pham (2019) found that silver nanoparticles (AgNPs) increased the total lipid production in Thalassiosira sp.…”

Section: Introductionmentioning

confidence: 70%

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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“…These deformed frustules can be effective indicators of water quality of wastewaters. 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.…”

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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Zinc-induced stress on cells ofHalamphora luciae(Bacillariophyceae)

Cited by 3 publications

References 96 publications

Antioxidant enzymes of Pseudochlorella pringsheimii under two stressors: variation of SOD Isoforms activity

Antioxidant enzymes of Pseudochlorella pringsheimii under two stressors: variation of SOD Isoforms activity

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

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

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