The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

Zhao, Zhao; Shi, Huijuan; Duan, Dongzhu; Li, Hongmei; Tong, Lei; Wang, Maolin; Zhao, Hai; Zhao, Yun

doi:10.1016/j.aquatox.2015.04.019

Cited by 31 publications

(11 citation statements)

References 35 publications

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“…This indicated that the decline of chlorophyll a is larger than chlorophyll b, which is similar to previous studies (Zhao and Shi, 2015).…”

Section: Discussion On the Determination Of Chlorophyll Content In Duckweedsupporting

confidence: 91%

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Analysis on Enrichment of Aquatic Plants Response to Different Heavy Metal Ions in Polluted Watertaking Duckweed as an Example

Ouyang¹,

Yang²,

Guo³

et al. 2019

Appl. Ecol. Env. Res.

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In order to improve the quality of water, the enrichment of different heavy metal ions by aquatic plants is studied-taking duckweed as an example. The site of the experiment is in Sichuan University of China, mainly from the following aspects of research: the heavy metal content in water, the heavy metal content in duckweed, chlorophyll content, adsorption capacity of Cadmium ions in different concentrations of nitric acid solution, enrichment capacity of Cadmium ion and the relationship between heavy metal content in duckweed and that of water. The study shows that the aquatic plants such as duckweed have a strong enrichment to Cu, Pb and Zn in the complex water body of heavy metals Cu, Pb and Zn, and their enrichment ability is higher than that of the water plants. With the increase of Cd 2+ concentration, the content of chlorophyll a and b in duckweed decreased significantly, and the decline is increased with the increase of Cd 2+ concentration. In 3 mg/L Cadmium nitrate solution, duckweed has a maximum absorption rate of Cd 2+ reaching 87%, the adsorption of duckweed decreased with increasing concentration and the enrichment of Cd 2+ in duckweed showed a nonmonotonic curve with the increase of treatment time. The concentration of Cd 2+ in the duckweed of 8d reached the maximum value (1.6 mg/g), and the concentration of Cd 2+ is reduced in the 9-12d duckweed, the concentration of heavy metals in water is significantly correlated with the concentration of Cu, Pb, Zn and Mn in aquatic plants duckweed. The method can effectively analyze the supposed enrichment. The sensitivity of duckweed can be used to detect changes of heavy metals in water, which can be used as an bioindicator of environmental pollution. At the same time, the accuracy of heavy metal determination by this method is high.

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“…This indicated that the decline of chlorophyll a is larger than chlorophyll b, which is similar to previous studies (Zhao and Shi, 2015).…”

Section: Discussion On the Determination Of Chlorophyll Content In Duckweedsupporting

confidence: 91%

“…The nitrate and perchloric acid (HNO3 40 mL, HCLO4 40 mL) added to 0.3 g duckweed powder were digested and heated on the electric heating board, and set up to (Zhao and Shi, 2015).…”

Section: Determination Of Heavy Metal Content In Duckweedmentioning

confidence: 99%

Analysis on Enrichment of Aquatic Plants Response to Different Heavy Metal Ions in Polluted Watertaking Duckweed as an Example

Ouyang¹,

Yang²,

Guo³

et al. 2019

Appl. Ecol. Env. Res.

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“…Other dominant plants, such as cattails ( Typha latifolia ), correlated with higher frequencies of neonicotinoid detection and higher concentrations in shallow marsh water; however, mechanisms were not elucidated with any plant species. Duckweed, and in some cases its associated microbial communities, can transform contaminants in water, e.g., antidepressants, anti-inflammatories, arsenic, and phenols. , Due to the prevalence of duckweed in aquatic environments worldwide, duckweed-facilitated transformation of neonicotinoids could represent a critical environmental fate mechanism. Therefore, the objectives of this work were (1) to determine if Lemna duckweed and/or its associated microbial community can remove imidacloprid and/or thiacloprid from water and (2) to quantify the formation of select environmentally relevant metabolites, including those with greater insect or vertebrate toxicity.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Lemna Duckweed and Microbial Transformation of Imidacloprid and Thiacloprid Neonicotinoids

Muerdter

Lefèvre

2019

Environ. Sci. Technol. Lett.

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Neonicotinoids are the most widely used insecticides in the world and are commonly measured in aquatic environments, including freshwater wetlands. We report for the first time the synergistic transformation of neonicotinoids by a Lemna duckweed and microbial system collected from an agricultural pond in Iowa, USA. Imidacloprid and thiacloprid were removed at statistically indistinguishable rates (0.63 ± 0.07 and 0.62 ± 0.05 day–1, respectively) from hydroponic medium only when in the presence of both duckweed and its associated microbial community. As evidence for this duckweed–microbial synergy, experiments with surface-sterilized duckweed, duckweed-associated microbes, pond water microbes alone, and two other plant species (Typha sp. and Ceratophyllum demersum) did not yield significant neonicotinoid removal beyond initial biomass sorption. Degradation of imidacloprid and thiacloprid by the duckweed–microbial system generated multiple, known neonicotinoid metabolites (desnitro-imidacloprid, imidacloprid urea, thiacloprid amide, and 6-chloronicotinic acid). Measured metabolites with increased insect or vertebrate toxicity were either absent (imidacloprid olefin) or present only in small amounts (desnitro-imidacloprid; <1% of the parent). The neonicotinoid parent and metabolite mass balance did not fully account for total neonicotinoid removal, suggesting mineralization and/or other unidentified transformation products with unknown toxicity. This novel duckweed- and microbe-facilitated neonicotinoid degradation may represent an important contribution to the environmental fate of neonicotinoids.

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“…Limited research has been conducted assessing differences in monoculture and mixed plantings of aquatic plants, and none has been conducted evaluating N and P uptake with plants established in FTWs. 21,23 The objectives of this study were (1) to quantify the influence of monoculture or mixed species plantings in FTWs on N and P remediation efficacy and (2) to determine if species effects on nutrient remediation efficacy and plant uptake in mixed plantings were additive, synergistic, or antagonistic.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Research that enhanced the understanding of how survival and nutrient uptake of individual plants change in a monoculture versus when grown in a mixed planting was conducted in forest and grassland ecosystems. , Plants grown in mixtures often demonstrate increased growth and performance in comparison to those in monocultures . Some plant species perform better in mixtures, increasing the resilience of systems and remediation efficacy through additive effects, , while other plant species perform best when grown in a monoculture, without competition . An additive effect refers to a plant combination in which the mixture effect sum (e.g., nutrient uptake into plant tissues) is equal to the individual effects of the species; a synergistic effect occurs when the effect is greater than the sum of the individual species, and antagonism occurs if the sum of the plant effects is less than the modeled sum of the individual species.…”

Section: Introductionmentioning

confidence: 99%

Comparative Nutrient Remediation by Monoculture and Mixed Species Plantings within Floating Treatment Wetlands

Chance

Majsztrik

Bridges

et al. 2020

Environ. Sci. Technol.

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Irrigation return water from container plant nurseries often contains elevated levels of nitrogen (N) and phosphorus (P). Floating treatment wetlands (FTWs) are one solution for removing nutrients from irrigation return flow. This study assessed how FTW planting strategy (monoculture vs mixed planting) influenced removal of N and P. Tanks containing FTWs received water with ∼22.3 N and 3.12 mg•L −1 P water-soluble fertilizer every 7 days for two, 8-week experiments. Experimental treatments were a control (open water); monoculture plantings (Iris ensata 'Rising Sun', Canna ×generalis 'Firebird', Agrostis alba, Carex stricta, or Panicum virgatum); or mixed plantings [2 mixtures: partial (monocots only) or a complete mixture of all plants]. For FTWs established in all treatments (except control), N and P removal from solution was additive, with a similar mass of N and P removed. However, when assessing nutrient uptake within plant tissues in FTWs, Panicum virgatum performed better (absorbed more N) within mixtures, a possible synergistic effect, while Iris ensata 'Rising Sun' performed poorly (fixed less N) within the complete mixture, a possible antagonist effect. Nutrient assimilation within plant tissues did not correlate with overall remediation performance for monocultures or mixtures, as tissue accumulation varied by nutrient and mixture.

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The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

Cited by 31 publications

References 35 publications

Analysis on Enrichment of Aquatic Plants Response to Different Heavy Metal Ions in Polluted Watertaking Duckweed as an Example

Analysis on Enrichment of Aquatic Plants Response to Different Heavy Metal Ions in Polluted Watertaking Duckweed as an Example

Synergistic Lemna Duckweed and Microbial Transformation of Imidacloprid and Thiacloprid Neonicotinoids

Comparative Nutrient Remediation by Monoculture and Mixed Species Plantings within Floating Treatment Wetlands

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