Elucidation of the defence mechanism in microalgae Chlorella sorokiniana under mercury exposure. Identification of Hg–phytochelatins

Gómez-Jacinto, Veronica; García-Barrera, Tamara; Gómez-Ariza, José Luis; Garbayo-Nores, Inés; Vílchez, Carlos

doi:10.1016/j.cbi.2015.06.013

Cited by 72 publications

(31 citation statements)

References 52 publications

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“…[179,180]. Detoxification mechanisms to combat Hginduced oxidative stress include enzymatic antioxidants and some nonenzymatic antioxidants, such as the following: glutathione [181], phytochelatin [182], salicylic acids [183], ascorbic acid [184], selenium, [185], proline [186] and tocopherols [187]. This process is correlated with the disruption of biomembrane lipids and cellular metabolism, resulting in plant injury [188].…”

Section: Toxic Effects On Plantsmentioning

confidence: 99%

Mercury in the terrestrial environment: a review

2020

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Background Environmental contamination by mercury is and will continue to be a serious risk for human health. Pollution of the terrestrial environment is particularly important as it is a place of human life and food production. This publication presents a review of the literature on issues related to mercury pollution of the terrestrial environment: soil and plants and their transformations. Results Different forms of atmospheric Hg may be deposited on surfaces by way of wet and dry processes. These forms may be sequestered within terrestrial compartments or emitted back into the atmosphere, and the relative importance of these processes is dependent on the form of Hg, the surface chemistry, and the environmental conditions. On the land surface, Hg deposition mainly occurs in the oxidized form (Hg2+), and its transformations are associated primarily with the oxidation–reduction potential of the environment and the biological and chemical processes of methylation. The deposition of Hg pollutants on the ground with low vegetation is as 3–5 times lower than that in forests. The estimation of Hg emissions from soil and plants, which occur mainly in the Hg0 form, is very difficult. Generally, the largest amounts of Hg are emitted from tropical regions, followed by the temperate zone, and the lowest levels are from the polar regions. Areas with vegetation can be ranked according to the size of the emissions as follows: forests > other areas (tundra, savannas, and chaparral) > agricultural areas > grassland ecosystems; areas of land devoid of vegetation emit more Hg than those with plants. In areas with high pollution, such as areas near Hg mines, the Hg content in soil and plants is much higher than in other areas. Conclusions Mercury is recognized as a toxic, persistent, and mobile contaminant; it does not degrade in the environment and becomes mobile because of the volatility of the element and several of its compounds. Atmospheric contamination by mercury continues to be one of the most important environmental problems in the modern world. The general conclusions were drawn from a review of the literature and presented in this paper.

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Section: Toxic Effects On Plantsmentioning

confidence: 99%

Mercury in the terrestrial environment: a review

2020

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“…At low metal ion concentrations, active transport is favored by the cell [156]; trace concentrations of heavy metals in municipal wastewater usually do not inhibit significantly the growth of the algal consortium. Many algae strains even show high tolerance to trace amounts of Hg, Cd, Pb and Cr [58,[159][160][161][162].…”

Section: Heavy-metal Contamination In Wastewatermentioning

confidence: 99%

Algal Biomass from Wastewater and Flue Gases as a Source of Bioenergy

et al. 2018

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Algae are without doubt the most productive photosynthetic organisms on Earth; they are highly efficient in converting CO 2 and nutrients into biomass. These abilities can be exploited by culturing microalgae from wastewater and flue gases for effective wastewater reclamation. Algae are known to remove nitrogen and phosphorus as well as several organic contaminants including pharmaceuticals from wastewater. Biomass production can even be enhanced by the addition of CO 2 originating from flue gases. The algal biomass can then be used as a raw material to produce bioenergy; depending on its composition, various types of biofuels such as biodiesel, biogas, bioethanol, biobutanol or biohydrogen can be obtained. However, algal biomass generated in wastewater and flue gases also contains contaminants which, if not degraded, will end up in the ashes. In this review, the current knowledge on algal biomass production in wastewater and flue gases is summarized; special focus is given to the algal capacity to remove contaminants from wastewater and flue gases, and the consequences when converting this biomass into different types of biofuels.

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“…[219][220]. Detoxification mechanisms to combat Hg-induced oxidative stress include enzymatic antioxidants and some nonenzymatic antioxidants, such as the following: glutathione [221], phytochelatin [222], salicylic acids [223], ascorbic acid [224], selenium, [225], proline [226] and tocopherols [227]. This process is correlated with the disruption of biomembrane lipids and cellular metabolism, resulting in plant injury [228].…”

Section: Toxic Effects On Plantsmentioning

confidence: 99%

Mercury in the terrestrial environment: a review

Gworek¹,

Dmuchowski²,

Baczewska-Dąbrowska

2020

Preprint

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Environmental contamination by mercury is and will continue to be a serious risk for human health. Pollution of the terrestrial environment is particularly important as it is a place of human life and food production. Publication presents a review of the literature on issues related to Hg pollution of the terrestrial environment: soil and plants and their transformations. Different forms of atmospheric Hg may be deposited on surfaces by way of wet and dry processes. These forms may be sequestered within terrestrial compartments or emitted back into the atmosphere, and the relative importance of these processes is dependent on the form of Hg, the surface chemistry, and the environmental conditions. On the land surface, Hg deposition mainly occurs in the oxidized form (Hg 2+ ), and its transformations are associated primarily with the oxidation-reduction potential of the environment and the biological and chemical processes of methylation. The deposition of Hg on ground with low vegetation as 3–5 times lower than that in forests. The estimation of Hg emissions from soil and plants, which occur mainly in the Hg 0 form, is very difficult. Generally, the largest amounts of Hg are emitted from tropical regions, and the lowest levels are from the polar regions.

show abstract

Elucidation of the defence mechanism in microalgae Chlorella sorokiniana under mercury exposure. Identification of Hg–phytochelatins

Cited by 72 publications

References 52 publications

Mercury in the terrestrial environment: a review

Mercury in the terrestrial environment: a review

Algal Biomass from Wastewater and Flue Gases as a Source of Bioenergy

Mercury in the terrestrial environment: a review

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