Heavy-metal (Zn, Cd) tolerance in selected clones of duck weed (Lemna minor)

Heavy-metal (HM) pollution is considered a leading source of environmental contamination. Heavy-metal pollution in ground water poses a serious threat to human health and the aquatic ecosystem. Conventional treatment technologies to remove the pollutants from wastewater are usually costly, time-consuming, environmentally destructive, and mostly inefficient. Phytoremediation is a cost-effective green emerging technology with long-lasting applicability. The selection of plant species is the most significant aspect for successful phytoremediation. Aquatic plants hold steep efficiency for the removal of organic and inorganic pollutants. Water hyacinth (Eichhornia crassipes), water lettuce (Pistia stratiotes) and Duck weed (Lemna minor) along with some other aquatic plants are prominent metal accumulator plants for the remediation of heavy-metal polluted water. The phytoremediation potential of the aquatic plant can be further enhanced by the application of innovative approaches in phytoremediation. A summarizing review regarding the use of aquatic plants in phytoremediation is gathered in order to present the broad applicability of phytoremediation.

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The Duckweed, Lemna minor Modulates Heavy Metal-Induced Oxidative Stress in the Nile Tilapia, Oreochromis niloticus

Water ◽

10.3390/w12112983 ◽

2020 ◽

Vol 12 (11) ◽

pp. 2983

Author(s):

Fagr Kh. Abdel-Gawad ◽

Wagdy K. B. Khalil ◽

Samah M. Bassem ◽

Vikas Kumar ◽

Costantino Parisi ◽

...

Keyword(s):

Oxidative Stress ◽

Heavy Metal ◽

Oreochromis Niloticus ◽

Nile Tilapia ◽

Lemna Minor ◽

Fish Growth ◽

High Dose ◽

Gene Expressions ◽

Nile Tilapia Oreochromis Niloticus ◽

Cu And Zn

A two-fold integrated research study was conducted; firstly, to understand the effects of copper (Cu) and zinc (Zn) on the growth and oxidative stress in Nile tilapia, Oreochromis niloticus; secondly, to study the beneficial effects of the duckweed Lemna minor L. as a heavy metal remover in wastewater. Experiments were conducted in mesocosms with and without duckweed. Tilapia fingerlings were exposed to Cu (0.004 and 0.02 mg L−1) and Zn (0.5 and 1.5 mg L−1) and fish fed for four weeks. We evaluated the fish growth performance, the hepatic DNA structure using comet assay, the expression of antioxidative genes (superoxide dismutase, SOD; catalase, CAT; glutathione peroxidase, GPx and glutathione-S-transferase, GST) and GPx and GST enzymatic activity. The results showed that Zn exhibited more pronounced toxic effects than Cu. A low dose of Cu did not influence the growth whereas higher doses of Cu and Zn significantly reduced the growth rate of tilapia compared to the control, but the addition of duckweed prevented weight loss. Furthermore, in the presence of a high dose of Cu and Zn, DNA damage decreased, antioxidant gene expressions and enzymatic activities increased. In conclusion, the results suggest that duckweed and Nile tilapia can be suitable candidates in metal remediation wastewater assessment programs.

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Bioremediation of heavy metal contaminated medium using Lemna minor, Daphnia magna and their consortium

Chemistry and Ecology ◽

10.1080/02757540.2017.1393534 ◽

2017 ◽

Vol 34 (1) ◽

pp. 43-55 ◽

Cited By ~ 1

Author(s):

Şeyda Fikirdeşici-Ergen ◽

Esra Üçüncü-Tunca ◽

Murat Kaya ◽

Evren Tunca

Keyword(s):

Heavy Metal ◽

Daphnia Magna ◽

Lemna Minor

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Heavy metal levels and esterase variations between metal-exposed and unexposed duckweed Lemna minor: field and laboratory studies

Environment International ◽

10.1016/j.envint.2004.01.006 ◽

2004 ◽

Vol 30 (6) ◽

pp. 811-814 ◽

Cited By ~ 23

Author(s):

Suman Mukherjee ◽

Swati Mukherjee ◽

P Bhattacharyya ◽

A.K Duttagupta

Keyword(s):

Heavy Metal ◽

Lemna Minor ◽

Laboratory Studies ◽

Metal Levels

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Effects of copper and cadmium on heavy metal polluted waterbody restoration by duckweed (Lemna minor)

Plant Physiology and Biochemistry ◽

10.1016/j.plaphy.2006.12.005 ◽

2007 ◽

Vol 45 (1) ◽

pp. 62-69 ◽

Cited By ~ 198

Author(s):

Wenhua Hou ◽

Xiao Chen ◽

Guanling Song ◽

Qunhui Wang ◽

Chein Chi Chang

Keyword(s):

Heavy Metal ◽

Lemna Minor

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A study of water environment purification efficiency by little duckweed Lemna minor L. from heavy metal salts using the energy of electromagnetic radiation and phytoremediant regeneration

University proceedings Volga region Natural sciences ◽

10.21685/2307-9150-2021-2-8 ◽

2021 ◽

Author(s):

O.A. Aref’eva ◽

◽

L.N. Ol’shanskaya ◽

R.Sh. Valiev ◽

◽

...

Keyword(s):

Heavy Metal ◽

Electromagnetic Radiation ◽

Lemna Minor ◽

Water Environment ◽

Metal Salts ◽

Purification Efficiency ◽

Heavy Metal Salts

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Comparative root transcriptome analysis of two soybean cultivars with different cadmium sensitivities reveals the underlying tolerant mechanisms

Genome ◽

10.1139/gen-2021-0048 ◽

2021 ◽

Author(s):

Yuan Ma ◽

Kuichen Liu ◽

Chunyu Zhang ◽

Feng Lin ◽

Wenbo Hu ◽

...

Keyword(s):

Heavy Metal ◽

Kegg Pathway ◽

Economic Value ◽

Rna Seq ◽

Cd Stress ◽

Toxic Heavy Metal ◽

Soybean Cultivars ◽

Cd Tolerance ◽

Transgenic Hairy Roots ◽

Soybean Roots

The soybean can provide rich protein and fat and has great economic value worldwide. Cadmium (Cd) is a toxic heavy metal to organisms. It can accumulate in plants and be transmitted to the human body via food chain. Cd is a serious threat to soybean development, especially to root growth. Some soybean cultivars present tolerant symptoms under Cd stress; however, the potential mechanisms are not fully understood. Here, we optimized RNA-seq to identify the differentially expressed genes (DEGs) in Cd-sensitive (KUAI) and Cd-tolerant (KAIYU) soybean roots and compared the DEGs between KAIYU and KUAI. A total of 1,506 and 1,870 DEGs were identified in the roots of KUAI and KAIYU, respectively. Through Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and gene function analyses, we found that genes related to antioxidants and sequestration were responsible for Cd tolerance in KAIYU. In addition, overexpression of Glyma11g02661, which encodes a heavy metal transporting ATPase, significantly improved Cd tolerance in transgenic hairy roots. These results provide a preliminary understanding of the tolerance mechanisms in response to Cd stress in soybean root development and are of great importance in developing Cd-resistant soybean cultivars by using the identified DEGs through genetic modification.

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Assessment of the potential of duckweed (Lemna minor L.) in treating lead-contaminated water through phytoremediation in stationary and recirculated set-ups

Environmental Engineering Research ◽

10.4491/eer.2019.258 ◽

2019 ◽

Vol 25 (6) ◽

pp. 977-982 ◽

Cited By ~ 1

Author(s):

Lanel Jane A Ubuza ◽

Palcon Cres S Padero ◽

Charie May N Nacalaban ◽

Jasmin T Tolentino ◽

Dominick C Alcoran ◽

...

Keyword(s):

Heavy Metal ◽

Heavy Metal Contamination ◽

Lemna Minor ◽

Physicochemical Characteristics ◽

Contaminated Water ◽

Water And Wastewater Treatment ◽

Environment Friendly ◽

Treatment Techniques ◽

Water And Wastewater ◽

Set Up

The problems of heavy metal contamination in water have become alarming and necessitate efficient remediation. However, conventional water and wastewater treatment techniques are considered costly, and some are even not environment-friendly. These problems trigger the idea of utilizing plants in the treatment process of metal-contaminated water. The current work investigated the potential of duckweed (<i>Lemna minor L.</i>) in treating lead-contaminated water through phytoremediation. The duckweed was used as bioaccumulator of lead (Pb) in the prepared stationary and recirculated set-ups at 3, 6, and 9 d. The physicochemical characteristics such as pH, BOD5, DO, turbidity, and temperature of the influent and effluent were compared. The highest bioaccumulation of 62.8% was achieved at 3 d in the recirculated set-up. The result of the analysis showed that duckweed has the potential in phytoremediation considering better quality effluent. The concentration of Pb in the effluent of 0.93 mg/L in the recirculated set-up with duckweed in 3 d was much lower compared to the initial concentration in the influent at 2.5 mg/L. This study demonstrated that duckweed could be a suitable plant for Pb removal from water with big implications in remediating heavy metal-contaminated water from various industries.

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