Effects of lead on growth, photosynthetic characteristics and production of reactive oxygen species of two freshwater green algae

Aquatic organisms are exposed to many stressors, e.g., heavy metals. Brassinosteroids, a plant hormone group, can effectively stimulate plants to defend against the negative impact of a heavy metal. The present study was conducted with an aim to find out the influence of 24-epibrassinolide (EBL) on Acutodesmus obliquus treated with 0.01 and 500 μM of lead (Pb) ions during 7 days of cultivation. Pb has a toxic effect on algal cultures because it limits both the growth and development and induces oxidative stress. Simultaneously, 1 μM EBL was involved in protecting algal cells against the toxic effect of Pb. Despite the presence of Pb, EBL significantly increased the number of algal cells and their metabolite content (e.g., proteins, monosaccharides, chlorophylls, carotenes, and xanthophylls). Cultures treated concurrently with EBL and Pb were characterized by a reduction in their content of endogenous Pb, H 2 O 2 , and malondialdehyde. Also, EBL increased the activity of catalase, ascorbate peroxidase, superoxide dismutase, glutathione reductase, and the content of ascorbate and glutathione. EBL increased the phytochelatin synthase activity, thereby enhancing the production of phytochelatins accountable for both binding and detoxification of Pb. These results indicate the influence of EBL on the inhibitory effect of Pb in A. obliquus. These findings help to clarify the role of BRs in the algal adaptation to the prevailing stressful conditions.

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“…2 and 5). Dao and Beardall (2016) confirmed that Scenedesmus sp. was very sensitive to 0.03-0.87 nM Pb with a continuous decline in growth rate.…”

Section: Discussionsupporting

confidence: 53%

24-Epibrassinolide modulates primary metabolites, antioxidants, and phytochelatins in Acutodesmus obliquus exposed to lead stress

Talarek-Karwel

Bajguz

Piotrowska‐Niczyporuk

2019

J Appl Phycol

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“…Lead. Dao and Beardall (2016) pore water into the water column, thereby reducing the bioavailability of zinc in pore water to the chironomid larvae. This factor suggest that pore water was the major exposure path for the chironomids to metals in sediment.…”

Section: Metalsmentioning

confidence: 99%

Effects of Pollution on Freshwater Organisms

Choudri

Baawain²

2017

Water Environment Research

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This review covers research papers and scientific literature published in the year 2016 on the effects of anthropogenic pollutants on freshwater organisms. In the first, the review begins with two broad sections thate are mainly focused on research reviews and broad field studies and surveys. This is followed by reviews of research categorized in sections to reflect the pollutant class. These sections include wastewater, stormwater and non-point source pollution, nutrients, sediment cap materials and suspended clays, botanical extracts, surfactants, metals, persistent organic pollutants, pharmaceuticals, endocrine disruptors, pesticides, petroleum hydrocarbons and polycyclic aromatic hydrocarbons (PAHs), ionic liquids, and nanomaterials. The final section of the review highlights the research published on describing innovations in the field of freshwater pollution research.

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“…[20,22] Therefore, they were tested for use as a novel fibrous adsorbent of lead(II), nickel(II), and cadmium(II) from model solutions and wastewater. Those metals were chosen due their high toxicity and cancerous effect, [23][24][25][26] high influence on the environment, [27][28][29] and relatively high abundance in industrial wastewater. The listed ions are among metal ions considered as harmful for the environment.…”

Section: Introductionmentioning

confidence: 99%

Adhesive Stalks of DiatomDidymosphenia geminataas a Novel Biological Adsorbent for Hazardous Metals Removal

Wysokowski

Bartczak

Żółtowska-Aksamitowska

et al. 2017

CLEAN Soil Air Water

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The application of biomass derived from the nuisance fresh‐water diatom species Didymosphenia geminata toward the adsorption and removal of heavy‐metal ions from water is reported. The cell‐free polysaccharide‐based stalks of these diatoms are used as adsorbents to remove harmful metal ions: Pb(II), Ni(II), and Cd(II). Detailed analyses of the adsorption kinetics using both pseudo‐first‐order model and pseudo‐second‐order models are performed. The results show a strong correspondence to a pseudo‐second‐order kinetic model. The Langmuir and Freundlich models are used to describe the adsorption isotherms. The correlation coefficients (r2) of the Langmuir model are equal to 0.994 (Pb2+), 0.995 (Cd2+), and 0.995 (Ni2+), and the r2 for the Freundlich model are equal to 0.991 (Pb2+), 0.991 (Cd2+), and 0.987 (Ni2+). The experimental data for all metal ions strongly support the Langmuir isotherm model. It is shown that stalks of D. geminata exhibit exceptional sorption capacity (qm) for Pb(II) ions of 175.48 mg g−1. Additionally, a high sorption capacity for Cd(II) (145.86 mg g−1), and Ni(II) (130.27 mg g−1) is observed. The thermodynamic aspects of the adsorption process of selected metal ions are also discussed. Preliminary tests investigating applications of D. geminata stalks for sewage purification from galvanic industry and battery and accumulator production were performed. These comprehensive studies show that D. geminata can be robustly applied for the removal of harmful metal ions from wastewater.

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Effects of lead on growth, photosynthetic characteristics and production of reactive oxygen species of two freshwater green algae

Cited by 85 publications

References 62 publications

24-Epibrassinolide modulates primary metabolites, antioxidants, and phytochelatins in Acutodesmus obliquus exposed to lead stress

24-Epibrassinolide modulates primary metabolites, antioxidants, and phytochelatins in Acutodesmus obliquus exposed to lead stress

Effects of Pollution on Freshwater Organisms

Adhesive Stalks of DiatomDidymosphenia geminataas a Novel Biological Adsorbent for Hazardous Metals Removal

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