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Pereira AL, Santos C, Azevedo J, Martins TP, Castelo-Branco R, Ramos V, Vasconcelos V, Campos A. Effects of two toxic cyanobacterial crude extracts containing microcystin-LR and cylindrospermopsin on the growth and photosynthetic capacity of the microalga Parachlorella kessleri. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.07.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pereira AL. The Unique Symbiotic System between a Fern and a Cyanobacterium, Azolla-Anabaena azollae: Their Potential as Biofertilizer, Feed, and Remediation. Symbiosis 2018. [DOI: 10.5772/intechopen.70466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Luo J, Cai L, Qi S, Wu J, Sophie Gu X. Influence of direct and alternating current electric fields on efficiency promotion and leaching risk alleviation of chelator assisted phytoremediation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 149:241-247. [PMID: 29241117 DOI: 10.1016/j.ecoenv.2017.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 11/20/2017] [Accepted: 12/01/2017] [Indexed: 06/07/2023]
Abstract
Direct and alternating current electric fields with various voltages were used to improve the decontamination efficiency of chelator assisted phytoremediation for multi-metal polluted soil. The alleviation effect of electric field on leaching risk caused by chelator application during phytoremediation process was also evaluated. Biomass yield, pollutant uptake and metal leaching retardation under alternating current (AC) and direct current (DC) electric fields were compared. The biomass yield of Eucalyptus globulus under AC fields with various voltages (2, 4 and 10 V) were 3.91, 4.16 and 3.67kg, respectively, significantly higher than the chelator treatment without electric field (2.71kg). Besides growth stimulation, AC fields increased the metal concentrations of plant tissues especially in aerial parts manifested by the raised translocation factor of different metals. Direct current electric fields with low and moderate voltages increased the biomass production of the species to 3.45 and 3.12kg, respectively, while high voltage on the contrary suppressed the growth of the plants (2.66kg). Under DC fields, metal concentrations elevated obviously with increasing voltages and the metal translocation factors were similar under all voltages. Metal extraction per plant achieved the maximum value under moderate voltage due to the greatest biomass production. DC field with high voltage (10V) decreased the volume of leachate from the chelator treatment without electric field from 1224 to 56mL, while the leachate gathered from AC field treatments raised from 512 to 670mL. DC field can retard the downward movement of metals caused by chelator application more effectively relative to AC field due to the constant water flow and electroosmosis direction. Alternating current field had more promotive effect on chelator assisted phytoremediation efficiency than DC field illustrated by more metal accumulation in the species. However, with the consideration of leaching risk, DC field with moderate voltage was the optimal supplementary technique for phytoremediation.
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Affiliation(s)
- Jie Luo
- College of Resources and Environment, Yangtze University, 111 University Road, Wuhan, China; China University of Geosciences, 388 Lumo Road, Wuhan 430074, China.
| | - Limei Cai
- College of Resources and Environment, Yangtze University, 111 University Road, Wuhan, China
| | - Shihua Qi
- China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
| | - Jian Wu
- China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
| | - Xiaowen Sophie Gu
- The University of Melbourne, Grattan Street Parkville, Melbourne, VIC 3010, Australia
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Machado J, Azevedo J, Freitas M, Pinto E, Almeida A, Vasconcelos V, Campos A. Analysis of the use of microcystin-contaminated water in the growth and nutritional quality of the root-vegetable, Daucus carota. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:752-764. [PMID: 27752954 DOI: 10.1007/s11356-016-7822-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Accepted: 10/03/2016] [Indexed: 06/06/2023]
Abstract
Toxic cyanobacterial blooms are often observed in freshwaters and may reflect the increased eutrophication of these environments and alterations in climate. Cyanotoxins, such as microcystins (MCs), are an effective threat to many life forms, ranging from plants to humans. Despite the research conducted to date on cyanotoxins, the risks associated to the use of contaminated water in agriculture require further elucidation. To tackle this aim, a research was conducted with the root-vegetable Daucus carota. The specific aims of this work were the following: (i) to evaluate the effects of MC-LR on the plant growth and photosynthesis; (ii) to evaluate the nutritional quality of carrot roots; and (iii) to measure bioaccumulation. To this purpose, young carrots were grown in soil during 1 month in natural conditions and exposed to Mycrocystis aeruginosa aqueous extracts containing environmentally realistic concentrations of MC-LR (10 and 50 MC-LR μg/L). The results showed that MC-LR may decrease root growth after 28 days of exposure to 50 μg/L and increase photosynthetic efficiency. We also observed changes in mineral and vitamin content in carrots as a result of the exposure to contaminated water. Moreover, MC-LR was detected in carrot roots by ELISA at very low concentration 5.23 ± 0.47 ng MC eq./g FW. The soil retained 52.7 % of the toxin potentially available for plants. This result could be attributed to MC-LR adsorption by soil particles or due to microbial degradation of the toxin. We conclude that the prolonged use of MC-LR-contaminated water may affect crop growth, alter the nutritional value of vegetable products, and potentiate contamination.
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Affiliation(s)
- J Machado
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal
| | - J Azevedo
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal
| | - M Freitas
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal
- Department of Environmental Health of School of Allied Health Technologies, and CISA/Research Center in Environment and Health, Polytechnic Institute of Porto, Rua de Valente Perfeito, 322, P 440-330, Gaia, Portugal
| | - E Pinto
- REQUIMTE, Department of Chemical Sciences, Laboratory of Applied Chemistry, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira 228, P 4050-313, Porto, Portugal
- Department of Environmental Health of School of Allied Health Technologies, and CISA/Research Center in Environment and Health, Polytechnic Institute of Porto, Rua de Valente Perfeito, 322, P 440-330, Gaia, Portugal
| | - A Almeida
- REQUIMTE, Department of Chemical Sciences, Laboratory of Applied Chemistry, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira 228, P 4050-313, Porto, Portugal
| | - V Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, P 4069-007, Porto, Portugal
| | - A Campos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal.
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Pereira AL, Azevedo J, Vasconcelos V. Assessment of uptake and phytotoxicity of cyanobacterial extracts containing microcystins or cylindrospermopsin on parsley (Petroselinum crispum L.) and coriander (Coriandrum sativum L). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:1999-2009. [PMID: 27807783 DOI: 10.1007/s11356-016-7910-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 10/13/2016] [Indexed: 06/06/2023]
Abstract
Blooms of harmful cyanobacteria that synthesize cyanotoxins are increasing worldwide. Agronomic plants can uptake these cyanotoxins and given that plants are ultimately ingested by humans, this represents a public health problem. In this research, parsley and coriander grown in soil and watered through 7 days with crude extracts containing microcystins (MCs) or cylindrospermopsin (CYN) in 0.1-1 μg mL-1 concentration range were evaluated concerning their biomass, biochemical parameters and uptake of cyanotoxins. Although biomass, chlorophylls (a and b), carotenoids and glutathione-S-transferase of parsley and coriander exposed to the crude extracts containing MC or CYN had shown variations, these values were not statistically significantly different. Protein synthesis is not inhibited in coriander exposed to MC or CYN and in parsley exposed to MC. Also, glutathione reductase (GR) and glutathione peroxidase (GPx) in parsley and coriander was not affected by exposure to MC, and in coriander, the CYN did not induce statistically significant differences in these two antioxidative enzymes. Only parsley showed statistically significant increase in protein content exposed to 0.5 μg CYN mL-1 (3.981 ± 0.099 mg g-1 FW) compared to control (2.484 ± 0.145 mg g-1 FW), statistically significant decrease in GR exposed to 0.1 μg CYN mL-1 (0.684 ± 0.117 nmol min-1 mg-1 protein) compared to control (1.30 ± 0.06 nmol min-1 mg-1 protein) and statistically significant increase in GPx exposed to 1 μg CYN mL-1 (0.054 ± 0.026 nmol min-1 mg-1 protein) compared to 0.5 μg CYN mL-1 (0.003 ± 0.001 nmol min-1 mg-1 protein). These changes may be due to the induction of defensive mechanisms by plants by the presence of toxic compounds in the soil or probably to a low generation of reactive oxygen species. Furthermore, the parsley and coriander leaves and stems after 10 days of exposure did not accumulate microcystins or cylindrospermopsin.
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Affiliation(s)
- Ana L Pereira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), BBE (Blue Biotechnology and Ecotoxicology), University of Porto, Rua dos Bragas 289, 4050-123, Porto, Portugal.
| | - Joana Azevedo
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), BBE (Blue Biotechnology and Ecotoxicology), University of Porto, Rua dos Bragas 289, 4050-123, Porto, Portugal
| | - Vitor Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), BBE (Blue Biotechnology and Ecotoxicology), University of Porto, Rua dos Bragas 289, 4050-123, Porto, Portugal
- Department of Biology, Faculty of Sciences of the University of Porto, Rua do Campo Alegre, 4069-007, Porto, Portugal
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Li J, Li J, Shi G, Mei Z, Wang R, Li D. Discerning biodegradation and adsorption of microcystin-LR in a shallow semi-enclosed bay and bacterial community shifts in response to associated process. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 132:123-131. [PMID: 27294671 DOI: 10.1016/j.ecoenv.2016.05.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 05/27/2016] [Accepted: 05/28/2016] [Indexed: 06/06/2023]
Abstract
Hepatotoxic microcystins (MCs) produced by cyanobacteria pose serious risks to aquatic ecosystems and human health, to understand elimination pathways and mechanisms for MCs, especially in a shallow and semi-enclosed eutrophic area, is of great significance. This study succeed in discerning biodegradation and adsorption of microcystin-LR (MCLR) mediated by water and/or sediment in northern part of Meiliang Bay in Lake Taihu, China, and among the first to reveal the shifts of indigenous bacterial community composition in response to MCLR-biodegradation in sediment by Illumina high-throughput sequencing (HTS). Results confirmed that biodegradation predominantly governed MCLR elimination as compared to adsorption in study area. Through faster biodegradation with a rate of 49.21μgL(-1)d(-1), lake water contributed more to overall MCLR removal than sediment. Sediment also played indispensable role in MCLR removal via primarily biodegradation by indigenous community (a rate of 17.27μgL(-1)d(-1)) and secondarily adsorption (<20% of initial concentration). HTS analysis showed that indigenous community composition shifted with decreased phylogenetic diversity in response to sediment-mediated MCLR-biodegradation. Proteobacteria became predominant (39.34-86.78%) in overall composition after biodegradation, which was mostly contributed by sharp proliferation of β-proteobacteria (22.76-74.80%), and might closely link to MCLR-biodegradation in sediment. Moreover, the members of several genera belonging to α-proteobacteria, β-proteobacteria and γ-proteobacteria seemed to be key degraders because of their dominance or increasing population as MCLR degraded. This study expands understanding on natural elimination mechanism for MCs, and provides guidance to reduce MCs' biological risks and guarantee ecosystem safety in aquatic habitats.
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Affiliation(s)
- Jieming Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing 100193, China.
| | - Ji Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing 100193, China
| | - Ge Shi
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Zulin Mei
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Ruiping Wang
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing 100193, China
| | - Dianyue Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
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Sedda T, Baralla E, Varoni MV, Pasciu V, Lorenzoni G, Demontis MP. Determination of microcystin-LR in clams (Tapes decussatus) of two Sardinian coastal ponds (Italy). MARINE POLLUTION BULLETIN 2016; 108:317-320. [PMID: 27103424 DOI: 10.1016/j.marpolbul.2016.04.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 04/07/2016] [Accepted: 04/10/2016] [Indexed: 06/05/2023]
Abstract
The presence of microcystin-LR (MC-LR) was monitored in Tapes decussatus harvested in two Sardinian ponds (Cabras and Tortolì, Italy) in spring and summer. After solid phase extraction, samples were analyzed using a screening enzyme-linked immunosorbent assay (ELISA) followed by a liquid chromatographic coupled to tandem mass spectrometer (LC-MS/MS) analysis. Results obtained through the ELISA test showed the presence of microcystins with a maximum concentration in August for Cabras pond (0.55ng/g) and in September for Tortolì pond (0.85ng/g). The LC-MS/MS analysis did not confirm the presence of MC-LR suggesting that results obtained with the ELISA technique could be due to the presence of other microcystins. According to the tolerable daily intake suggested by the World Health Organization, these results hint that clams harvested in these ponds are safe for human health. These data can contribute to enrich the knowledge about the healthiness of Sardinian ponds and of their products.
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Affiliation(s)
- Tiziana Sedda
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Elena Baralla
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy.
| | - Maria Vittoria Varoni
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Valeria Pasciu
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Giuseppa Lorenzoni
- Experimental Zooprophylattic Institute of Sardinia, via Duca degli Abruzzi, 07100 Sassari, Italy
| | - Maria Piera Demontis
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
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