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Open AccessArticle

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

1
Water Pollution Research Department, Centre of Excellence for Advanced Sciences (CEAS), National Research Centre, Dokki, Giza 12622, Egypt
2
Department of Cell Biology, Centre of Excellence for Advanced Sciences (CEAS), National Research Centre, Dokki, Giza 12622, Egypt
3
Aquaculture Research Institute, Department of Animal and Veterinary Science, University of Idaho, Moscow, ID 83844, USA
4
Comparative Endocrinology Lab, Department of Biology, University of Naples Federico II, 80126 Naples, Italy
5
Laboratory of Zebrafish Developmental Genomics, International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
6
Marine Science Department, Canal Suez University, Ismailia 41522, Egypt
7
Environmental Sciences and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni-Suef 62511, Egypt
8
Interdepartmental Research Centre for Environment, University of Naples Federico II, 80134 Naples, Italy
*
Authors to whom correspondence should be addressed.
Authors contributed equally.
Water 2020, 12(11), 2983; https://doi.org/10.3390/w12112983
Received: 18 September 2020 / Revised: 18 October 2020 / Accepted: 21 October 2020 / Published: 24 October 2020
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. View Full-Text
Keywords: Nile tilapia; Oreochromis niloticus; liver; duckweed; Lemna minor; Cu; Zn; glutathione peroxidase; GPx; glutathione-S-transferase; GST; superoxide dismutase; SOD; catalase; CAT; remediation assessment Nile tilapia; Oreochromis niloticus; liver; duckweed; Lemna minor; Cu; Zn; glutathione peroxidase; GPx; glutathione-S-transferase; GST; superoxide dismutase; SOD; catalase; CAT; remediation assessment
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MDPI and ACS Style

Abdel-Gawad, F.K.; Khalil, W.K.B.; Bassem, S.M.; Kumar, V.; Parisi, C.; Inglese, S.; Temraz, T.A.; Nassar, H.F.; Guerriero, G. The Duckweed, Lemna minor Modulates Heavy Metal-Induced Oxidative Stress in the Nile Tilapia, Oreochromis niloticus. Water 2020, 12, 2983. https://doi.org/10.3390/w12112983

AMA Style

Abdel-Gawad FK, Khalil WKB, Bassem SM, Kumar V, Parisi C, Inglese S, Temraz TA, Nassar HF, Guerriero G. The Duckweed, Lemna minor Modulates Heavy Metal-Induced Oxidative Stress in the Nile Tilapia, Oreochromis niloticus. Water. 2020; 12(11):2983. https://doi.org/10.3390/w12112983

Chicago/Turabian Style

Abdel-Gawad, Fagr K.; Khalil, Wagdy K.B.; Bassem, Samah M.; Kumar, Vikas; Parisi, Costantino; Inglese, Sara; Temraz, Tarek A.; Nassar, Hossam F.; Guerriero, Giulia. 2020. "The Duckweed, Lemna minor Modulates Heavy Metal-Induced Oxidative Stress in the Nile Tilapia, Oreochromis niloticus" Water 12, no. 11: 2983. https://doi.org/10.3390/w12112983

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