Interspecific variation in the diets of herbivores in an industrial environment: implications for exposure to fluoride emissions

Davis, Naomi E.; Death, Clare; Coulson, Geoff; Newby, Lora; Hufschmid, Jasmin

doi:10.1007/s11356-016-6234-z

Cited by 8 publications

(3 citation statements)

References 64 publications

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“…Similar to previous studies, these species showed tolerance to heavy metal pollution [ 60 , 61 ]. These tolerant species are not only pollution indicators but could also be used as bioremediators [ 62 ]. In this regard, bioremediation by higher plants is an efficient process that remediates soil pollutants [ 63 ].…”

Section: Discussionmentioning

confidence: 99%

High Redox Status as the Basis for Heavy Metal Tolerance of Sesuvium portulacastrum L. Inhabiting Contaminated Soil in Jeddah, Saudi Arabia

et al. 2021

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Because sewage sludge is contaminated with heavy metals, its disposal in the soil may pose risks to the ecosystem. Thus, heavy metal remediation is necessary to reduce the associated risks. The goal of this research is to introduce a heavy metal resistant species and to assess its phytoremediation, oxidative damage markers and stress tolerance mechanisms. To this end, field research was done to compare the vegetation of polluted sites to that of a healthy site. We found 42 plant species identified in the study, Sesuvium portulacastrum L. was chosen because of its high relative density (10.3) and maximum frequency (100 percent) in the most contaminated areas. In particular, S. portulacastrum plants were characterized by strong Cu, Ni, and As uptake. At the organ level, to control growth reduction and oxidase damage, particularly in roots, increased detoxification (e.g., metallothionein, phytochelatins) and antioxidants mechanisms (e.g., tocopherols, glutathione, peroxidases). On the other hand, flavonoids content and the activity of glutathione-S transferase, glutathione reductase and dehydroascorbate reductase were increased manly in the shoots. These biochemical markers can be applied to select tolerance plant species grown under complex heavy metal contamination. Our findings also introduced S. portulacastrum to reduce soil contamination0associated risks, making the land resource available for agricultural production.

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Section: Discussionmentioning

confidence: 99%

High Redox Status as the Basis for Heavy Metal Tolerance of Sesuvium portulacastrum L. Inhabiting Contaminated Soil in Jeddah, Saudi Arabia

et al. 2021

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“…The other species including Aizoon canariense , Aerva javanica and Leptadenia pyrotechnica appeared to be saved in the control site, indicating high sensitivity to the toxicity of heavy metals. The tolerant species could also be pollutants bioremediators [ 65 ]. Out of the identified tolerant species, we selected A. retroflexus because it showed the highest frequencies and relative densities at contaminated sites.…”

Section: Discussionmentioning

confidence: 99%

Heavy Metal Effects on Biodiversity and Stress Responses of Plants Inhabiting Contaminated Soil in Khulais, Saudi Arabia

Alsherif

Al-Shaikh

AbdElgawad

2022

Biology

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Accumulation of heavy metals in soil is becoming an increasingly serious eco-environmental problem. Thus, investigating how plants mitigate heavy metal toxicity is necessary to reduce the associated risks. Here, we aimed to assess the bioremediation and stress defense strategies of tolerant plant species grown under complex heavy metals contamination. To this end, a field study was conducted on the vegetation cover of sites with different soil pollution levels. Forty-two plant species that belong to 38 genera and 21 families were identified. The pollution had a significant impact on plant richness in the polluted sites. Out of several screened plants, Amaranthus retroflexus L. was selected because of its high relative density (16.7) and a high frequency (100%) in the most polluted sites. The selected species showed a high biological concentration factor (BCF) and low translocation factor (TF) for Cu, As and Ni. To control the heavy metal-induced oxidative damage, A. retroflexus invested in detoxification (metallothionein and phytochelatins, glutathione and glutathione-S-transferase (GST). At the organ level, oxidase damage (H2O2, lipid and protein peroxidation) was observed, particularly in the roots. To mitigate heavy metal oxidative stress, antioxidant mechanisms (e.g., tocopherols, glutathione, peroxidases, catalase, peroxide dismutase and ASC-GSH cycle) were upregulated, mainly in the roots. Overall, our results suggested the potentiality of A. retroflexus as a promising bioremediatory and stress-tolerant plant at the same time; moreover, defense and detoxification mechanisms were uncovered.

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“…Although low concentrations of fluoride in water were proven to benefit human health concerning dental well-being, elevated concentrations could lead to high rates of fluorosis and other diseases. This anion reaches fresh waters either through the weathering of geological material or via human activities, such as effluent disposal [1,2]. The World Health Organization (WHO) recommends a maximum value of 1.5 mg L −1 of fluoride in drinking water.…”

Section: Introductionmentioning

confidence: 99%

Exogenous Auxin and Gibberellin on Fluoride Phytoremediation by Eichhornia crassipes

Vaz

Borges

Ribeiro

2023

Plants

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High rates of fluorosis were reported worldwide as a result of human consumption of water with fluoride contents. Adjusting fluoride concentration in water as recommended by the World Health Organization (<1.5 mg L−1) is a concern and it needs to be conducted through inexpensive, but efficient techniques, such as phytoremediation. The application of phytohormones was investigated as a strategy to improve this process. Thus, the main goal of this research was to evaluate the effect of exogenous auxin and gibberellin on the tropical duckweed Eichhornia crassipes performance for fluoride phytoremediation. Definitive screening and central composite rotatable designs were used for experiments where fluoride concentration (5~15 mg L−1), phosphorus concentration (1~10 mg L−1), and pH (5~9) were assessed as well throughout 10 days. Fluoride contents were determined in solution and plant tissues by potentiometry. Higher concentrations of fluoride reflected on greater absorptions by plants, though in relative terms removal efficiencies were quite similar for all treatments (~60%). Auxin and acidic conditions favored fluoride removals per mass of plant. Fluoride accumulated mostly in leaves and auxin probably alleviated toxic effects on E. crassipes while gibberellin showed no effect. Therefore, E. crassipes could be employed as a fluoride accumulator plant for water treatment and exogenous auxin may be used to improve the process.

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Interspecific variation in the diets of herbivores in an industrial environment: implications for exposure to fluoride emissions

Cited by 8 publications

References 64 publications

High Redox Status as the Basis for Heavy Metal Tolerance of Sesuvium portulacastrum L. Inhabiting Contaminated Soil in Jeddah, Saudi Arabia

High Redox Status as the Basis for Heavy Metal Tolerance of Sesuvium portulacastrum L. Inhabiting Contaminated Soil in Jeddah, Saudi Arabia

Heavy Metal Effects on Biodiversity and Stress Responses of Plants Inhabiting Contaminated Soil in Khulais, Saudi Arabia

Exogenous Auxin and Gibberellin on Fluoride Phytoremediation by Eichhornia crassipes

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