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Shen J, Sun Y, Liu X, Chai Y, Wang C, Xu J. Nerve Regeneration Potential of Antioxidant-Modified Black Phosphorus Quantum Dots in Peripheral Nerve Injury. ACS NANO 2024; 18:23518-23536. [PMID: 39150909 DOI: 10.1021/acsnano.4c07285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/18/2024]
Abstract
Peripheral nerve injury is a major societal concern. Black phosphorus (BP) has inherent advantages over cell-based therapies in regenerative medicine. However, controlling spontaneous degradation and size-dependent cytotoxicity remains challenging and poses difficulties for clinical translation. In this study, we constructed zero-dimensional BP quantum dots (QDs) modified with antioxidant β-carotene and comprehensively investigated them in Schwann cells (SCs) to elucidate their potential for peripheral nerve repair. In vitro experiments demonstrated that BPQD@β-carotene has an inappreciable toxicity and good biocompatibility, favoring neural regrowth, angiogenesis, and inflammatory regulation of SCs. Furthermore, the PI3K/Akt and Ras/ERK1/2 signaling pathways were activated in SCs at the genetic, protein, and metabolite levels. The BPQD@β-carotene-embedded GelMA/PEGDA scaffold enhanced functional recovery by promoting axon remyelination and regeneration and facilitating intraneural angiogenesis in peripheral nerve injury models of rats and beagle dogs. These results contribute to advancing knowledge of BP nanomaterials in tissue regeneration and show significant potential for application in translational medicine.
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Affiliation(s)
- Junjie Shen
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, PR China
- Chinese National Center for Orthopaedics, Shanghai 200233, PR China
| | - Yi Sun
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, PR China
- Chinese National Center for Orthopaedics, Shanghai 200233, PR China
| | - Xuanzhe Liu
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, PR China
- Chinese National Center for Orthopaedics, Shanghai 200233, PR China
| | - Yimin Chai
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, PR China
- Chinese National Center for Orthopaedics, Shanghai 200233, PR China
| | - Chunyang Wang
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, PR China
- Chinese National Center for Orthopaedics, Shanghai 200233, PR China
| | - Jia Xu
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, PR China
- Chinese National Center for Orthopaedics, Shanghai 200233, PR China
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Luo Y, Dao G, Zhou G, Wang Z, Xu Z, Lu X, Pan X. Effects of low concentration of gallic acid on the growth and microcystin production of Microcystis aeruginosa. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:169765. [PMID: 38181948 DOI: 10.1016/j.scitotenv.2023.169765] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/18/2023] [Accepted: 12/28/2023] [Indexed: 01/07/2024]
Abstract
Gallic acid (GA) is an allelochemical that has been utilized in high concentrations for the management of harmful algal blooms (HABs). However, there is limited knowledge regarding its impact on the growth of M. aeruginosa as the GA concentration transitions from high to low during the HABs control process. This study has revealed that as the GA concentration decreases (from 10 mg/L to 0.001 μg/L), a dose-response relationship becomes apparent in the growth of M. aeruginosa and microcystin production, characterized by high-dose inhibition and low-dose stimulation. Notably, at the concentration of 0.1 μg/L GA, the most significant growth-promoting effect on both growth and MCs synthesis was observed. The growth rate and maximum cell density were increased by 1.09 and 1.16 times, respectively, compared to those of the control group. Additionally, the contents of MCs synthesis saw a remarkable increase, up by 1.85 times. Furthermore, lower GA concentrations stimulated the viability of cyanobacterial cells, resulting in substantially higher levels of reactive oxygen species (ROS) and chlorophyll-a (Chl a) compared to other concentrations. Most importantly, the expression of genes governing MCs synthesis was significantly upregulated, which appears to be the primary driver behind the significantly higher MCs levels compared to other conditions. The ecological risk quotient (RQ) value of 0.1 μg/L GA was the highest of all experimental groups, which was approximately 30 times higher than that of the control, indicating moderate risk. Therefore, it is essential to pay attention to the effect of M. aeruginosa growth, metabolism and water ecological risk under the process of reducing GA concentration after dosing during the HABs control process.
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Affiliation(s)
- Yu Luo
- Faculty of Environmental Science and Engineering, Kunming University of Science and technology, Kunming 650500, Yunnan, China; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed, Yunnan Research Academy of Eco-environmental Sciences, Kunming 650034, Yunnan, China
| | - Guohua Dao
- Faculty of Environmental Science and Engineering, Kunming University of Science and technology, Kunming 650500, Yunnan, China
| | - Guoquan Zhou
- Faculty of Environmental Science and Engineering, Kunming University of Science and technology, Kunming 650500, Yunnan, China
| | - Zhuoxuan Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and technology, Kunming 650500, Yunnan, China
| | - Zhixiang Xu
- Faculty of Environmental Science and Engineering, Kunming University of Science and technology, Kunming 650500, Yunnan, China
| | - Xinyue Lu
- Faculty of Environmental Science and Engineering, Kunming University of Science and technology, Kunming 650500, Yunnan, China
| | - Xuejun Pan
- Faculty of Environmental Science and Engineering, Kunming University of Science and technology, Kunming 650500, Yunnan, China.
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3
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Wang Z, Yu S, Nie Y, Liu R, Zhu W, Zhou Z, Ma Y, Diao J. Effect of acetochlor on the symbiotic relationship between microalgae and bacteria. JOURNAL OF HAZARDOUS MATERIALS 2024; 463:132848. [PMID: 37924702 DOI: 10.1016/j.jhazmat.2023.132848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 10/13/2023] [Accepted: 10/22/2023] [Indexed: 11/06/2023]
Abstract
In this study, two strains of symbiotic bacteria (SOB-1 and SOB-2) were isolated from Scenedesmus obliquus, and various algal-bacterial mutualistic systems were established under acetochlor (ACT) stress conditions. Following exposure to varying ACT concentrations from 2.0 to 25.0 μg/L, the capacity for co-cultured bacteria to degrade ACT was enhanced in 7 days by up to 226.9% (SOB-1) and 193.0% (SOB-2), compared with axenic algae, although bacteria exposed to higher ACT concentrations exacerbated algal metabolic stress, oxidative states, apoptosis and cellular lysis. ACT reduced carbohydrates in the phycosphere by up to 31.5%; compensatory nutrient plunder and structural damage by bacteria were the potential exploitation pathways determined based on the inhibition of bacterial infection using a glucanase inhibitor. The ACT-induced reduction in algal antimicrobial substances, including fatty acids and phenolics (by up to 58.1% and 56.6%, respectively), also facilitated bacterial exploitation of algae. ACT-dependent interspecific interaction coefficients between algae and bacteria generated from long-term symbiosis cultures implied that bacteria moved from mutualism (0 and 2.0 μg/L ACT) to exploitation (7.9 and 25.0 μg/L ACT). The population dynamic model under incremental ACT-concentration scenarios inferred that theoretical systematic extinction may occur in algal-bacterial systems earlier than in axenic algae. These outcomes provide interspecific insights into the distortion of algal-bacterial reciprocity due to the ecotoxicological effects of ACT.
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Affiliation(s)
- Zikang Wang
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Simin Yu
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Yufan Nie
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Ran Liu
- Beijing Institute of Food Inspection and Research (Beijing Municipal Center for Food Safety Monitoring and Risk Assessment), Beijing, China
| | - Wentao Zhu
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Zhiqiang Zhou
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Yongqiang Ma
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Jinling Diao
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China.
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Yang S, Yin R, Wang C, Wang J. Improved efficiency of Sedum lineare (Crassulaceae) in remediation of arsenic-contaminated soil by phosphate-dissolving strain P-1 in association with phosphate rock. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:8317-8336. [PMID: 37597084 DOI: 10.1007/s10653-023-01727-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 08/07/2023] [Indexed: 08/21/2023]
Abstract
The selection of appropriate plants and growth strategies is a key factor in improving the efficiency and universal applicability of phytoremediation. Sedum lineare grows rapidly and tolerates multiple adversities. The effects of inoculation of Acinetobacter sp. phosphate solubilizing bacteria P-1 and application of phosphate rock (PR) as additives on the remediation efficiency of As-contaminated soil by S. lineare were investigated. Compared with the control, both the single treatment and the combination of inoculation with strain P-1 and application of PR improved the biomass by 30.7-395.5%, chlorophyll content by 48.1-134.8%, total protein content by 12.5-92.4% and total As accumulation by 45.1-177.5%, and reduced the As-induced oxidative damage. Inoculation with strain P-1 increased the activities of superoxide dismutases and catalases of S. lineare under As stress, decreased the accumulation of reactive oxygen species in plant tissues and promoted the accumulation of As in roots. In contrast, simultaneous application of PR decreased As concentration in S. lineare tissues, attenuated As-induced lipid peroxidation and improved As transport to shoots. In addition, the combined application showed the best performance in improving resistance and biomass, which significantly increased root length by 149.1%, shoot length by 33%, fresh weight by 395.5% and total arsenic accumulation by 159.2%, but decreased the malondialdehyde content by 89.1%. Our results indicate that the combined application of strain P-1 and PR with S. lineare is a promising bioremediation strategy to accelerate phytoremediation of As-contaminated soils.
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Affiliation(s)
- Shaohui Yang
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Rong Yin
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Chen Wang
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Jiehua Wang
- School of Environmental Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, 300072, China.
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Ye C, Chen C, Zhang K, Wu X, Cai WF, Feng M, Yu X. Solar/periodate-triggered rapid inactivation of Microcystis aeruginosa by interrupting the Calvin-Benson cycle. ENVIRONMENT INTERNATIONAL 2023; 180:108204. [PMID: 37776621 DOI: 10.1016/j.envint.2023.108204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/24/2023] [Accepted: 09/11/2023] [Indexed: 10/02/2023]
Abstract
Frequent outbreak of cyanobacteria is a serious problem for drinking water treatment. The microcystins released from Microcystis aeruginosa (M. aeruginosa) could cause irreversible damage to human health. Catalyst-free solar/periodate (PI) system has recently presented great potential for bacterial inactivation, whereas the application potential and underlying mechanisms of the effective M. aeruginosa control remain unclear. Our work delineated the key role of ROS that inactivating/harmless disposing M. aeruginosa in the simulated sunlight (SSL)/PI system. Singlet oxygen may specifically cause DNA damage but maintain membrane integrity, preventing the risk of microcystins leakage. The SSL/PI 300 μM system could also effectively inhibit M. aeruginosa recovery for >7 days and completely degrade microcystin-LR (50.0 μg/L) within 30 min. Non-targeted metabolomic analysis suggested that the SSL/PI system inactivated M. aeruginosa mainly by interrupting the Calvin-Benson cycle, which damaged the metabolic flux of glycolysis and its downstream pathways such as the oxidative PPP pathway and glutathione metabolism. Furthermore, the activated PI system exhibited an even better algal inhibition under natural sunlight irradiation, evidenced by the seriously damaged cell membrane of M. aeruginosa. Overall, this study reported the comprehensive mechanisms of algal control and application potentials of solar/PI systems. The findings facilitated the development of emerging algicidal technology and its application in controlling environmental harmful algae.
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Affiliation(s)
- Chengsong Ye
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, China
| | - Chenlan Chen
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, China
| | - Kaiting Zhang
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, China
| | - Xu Wu
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, China
| | - Wei-Feng Cai
- Xiamen Cancer Center, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Fujian 361103. China
| | - Mingbao Feng
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, China
| | - Xin Yu
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, China.
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D'ors A, Sánchez-Fortún A, Cortés-Téllez AA, Fajardo C, Mengs G, Nande M, Martín C, Costa G, Martín M, Bartolomé MC, Sánchez-Fortún S. Adverse effects of iron-based nanoparticles on freshwater phytoplankton Scenedesmus armatus and Microcystis aeruginosa strains. CHEMOSPHERE 2023; 339:139710. [PMID: 37532199 DOI: 10.1016/j.chemosphere.2023.139710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/29/2023] [Accepted: 07/31/2023] [Indexed: 08/04/2023]
Abstract
Zero-valent nano-iron particles (nZVI) are increasingly present in freshwater aquatic environments due to their numerous applications in environmental remediation. However, despite the broad benefits associated with the use and development of nZVI nanoparticles, the potential risks of introducing them into the aquatic environment need to be considered. Special attention should be focused on primary producer organisms, the basal trophic level, whose impact affects the rest of the food web. Although there are numerous acute studies on the acute effects of these nanoparticles on photosynthetic primary producers, few studies focus on long-term exposures. The present study aimed at assessing the effects of nZVI on growth rate, photosynthesis activity, and reactive oxygen activity (ROS) on the freshwater green algae Scenedesmus armatus and the cyanobacteria Microcystis aeruginosa. Moreover, microcystin production was also evaluated. These parameters were assessed on both organisms singly exposed to 72 h-effective nZVI concentration for 10% maximal response for 28 days. The results showed that the cell growth rate of S. armatus was initially significantly altered and progressively reached control-like values at 28 days post-exposure, while M. aeruginosa did not show any significant difference concerning control values at any time. In both strains dark respiration (R) increased, unlike net photosynthesis (Pn), while gross photosynthesis (Pg) only slightly increased at 7 days of exposure and then became equal to control values at 28 days of exposure. The nZVI nanoparticles generated ROS progressively during the 28 days of exposure in both strains, although their formation was significantly higher on green algae than on cyanobacteria. These data can provide additional information to further investigate the potential risks of nZVI and ultimately help decision-makers make better informed decisions regarding the use of nZVI for environmental remediation.
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Affiliation(s)
- A D'ors
- Dpt. of Pharmacology and Toxicology, Universidad Complutense de Madrid (UCM), w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - A Sánchez-Fortún
- Dpt. of Pharmacology and Toxicology, Universidad Complutense de Madrid (UCM), w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - A A Cortés-Téllez
- Environmental Toxicology Laboratory, Faculty of Chemistry-Pharmacobiology, Universidad Michoacana de San Nicolás de Hidalgo, 403 Santiago Tapia St, 58000, Morelia, (Michoacán), Mexico
| | - C Fajardo
- Dpt. of Biomedicine and Biotechnology, Universidad de Alcalá (UAH), w/n San Diego Sq, 28801, Alcalá de Henares, Spain
| | - G Mengs
- Technical and R&D Department, Ecotoxilab SL, 10 Juan XXIII, 28550, Tielmes, Spain
| | - M Nande
- Dpt. of Biochemistry and Molecular Biology, Complutense University, w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - C Martín
- Dpt. of Biotechnology-Plant Biology, Universidad Politécnica de Madrid (UPM), 3 Complutense Ave, 28040, Madrid, Spain
| | - G Costa
- Department of Animal Physiology, Faculty of Veterinary Sciences, Complutense University, w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - M Martín
- Dpt. of Biochemistry and Molecular Biology, Complutense University, w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - M C Bartolomé
- Environmental Toxicology Laboratory, Faculty of Chemistry-Pharmacobiology, Universidad Michoacana de San Nicolás de Hidalgo, 403 Santiago Tapia St, 58000, Morelia, (Michoacán), Mexico.
| | - S Sánchez-Fortún
- Dpt. of Pharmacology and Toxicology, Universidad Complutense de Madrid (UCM), w/n Puerta de Hierro Ave, 28040, Madrid, Spain.
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Bhattacharya S, Prajapati BG, Singh S. A critical review on the dissemination of PH and stimuli-responsive polymeric nanoparticular systems to improve drug delivery in cancer therapy. Crit Rev Oncol Hematol 2023; 185:103961. [PMID: 36921781 DOI: 10.1016/j.critrevonc.2023.103961] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023] Open
Abstract
Stimuli-responsive nanocarriers have the potential to revolutionize cancer treatment by allowing precise delivery of drugs to the site of disease. The use of polymeric nanocarriers with surfaces that respond to triggers such as pH, light, temperature, and redox potential enables targeted drug distribution. pH is a particularly useful tool, as the lower pH in tumour microenvironments can trigger changes in drug release. Recent advances in the development of pH-responsive polymer nanoparticles have shown great promise for improved in vivo drug delivery, reduced negative drug responses, and more precise drug distribution. A deeper understanding of these nanocarriers will allow us to overcome the challenges of targeted cancer treatment and create a better drug delivery system.
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Affiliation(s)
- Sankha Bhattacharya
- Department of Pharmaceutics, School of Pharmacy & Technology Management, SVKM'S NMIMS Deemed-to-be University, Shirpur, Maharashtra 425405, India.
| | - Bhuphendra G Prajapati
- Shree S. K. Patel College of Pharmaceutical Education and Research, Ganpat University, 22 Kherva, 384012, India
| | - Sudarshan Singh
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
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Han Y, Jeppesen E, Lürling M, Zhang Y, Ma T, Li W, Chen K, Li K. Combining lanthanum-modified bentonite (LMB) and submerged macrophytes alleviates water quality deterioration in the presence of omni-benthivorous fish. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 314:115036. [PMID: 35421721 DOI: 10.1016/j.jenvman.2022.115036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 03/17/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
Bioturbation by omni-benthivorous fish often causes sediment resuspension and internal nutrient loading, which boosts phytoplankton growth and may lead to a shift of clear water lakes to a turbid state. Removal of large-sized omni-benthivorous individuals is a lake restoration measure that may revert lakes from a turbid to a clear water state, yet the rapid reproduction of small omni-benthivorous fish in tropical and subtropical shallow lakes may impede such lake recovery. In lake restoration, also a combination of lanthanum-modified bentonite (LMB) and planting submerged macrophytes has been used that may synergistically improve lake water quality. How the combined effect works in the presence of small omni-benthivorous fish has not been studied, which is needed given the high abundances of small omni-benthivorous fish in (sub)tropical lakes. We conducted a two-by-two factorial mesocosm experiment with and without the submerged macrophytes Vallisneria natans and with and without LMB, all in the presence of small crucian carp. At the end of the experiment, turbidity in the V. natans, LMB and combined LMB + V. natans treatments had decreased by 0.8%, 30.3% and 30.9%, respectively, compared with the controls. In addition, the nitrogen (N) and phosphorus (P) release from the sediment in the combined LMB + V. natans treatments had decreased substantially, by 97.4% and 94.3%, respectively, compared with the control. These N and P fluxes were also significantly lower in the combined LMB + V. natans treatments than in the sole LMB treatment (88.1% and 82.3%) or the V. natans treatment (93.2% and 90.3%). Cyanobacteria in the overlying water in the combined LMB + V. natans treatments significantly decreased by 84.1%, 63.5% and 37.0%, respectively, compared with the control and the sole LMB and V. natans treatments. Our results show that LMB and submerged macrophytes complement each other in effectively improving the water quality, even in the presence of small omni-benthivorous fish.
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Affiliation(s)
- Yanqing Han
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Erik Jeppesen
- Sino-Danish Centre for Education and Research, Beijing, 100049, China; Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark; Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation, Middle East Technical University, Ankara, 06800, Turkey; Institute of Marine Sciences, Middle East Technical University, Erdemli-Mersin, 33731, Turkey
| | - Miquel Lürling
- Aquatic Ecology & Water Quality Management Group, Department of Environmental Sciences, Wageningen University, Wageningen, 6700, AA, Netherlands
| | - You Zhang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.
| | - Tingting Ma
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Wei Li
- College of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing, 40410, China
| | - Kunquan Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Kuanyi Li
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; Sino-Danish Centre for Education and Research, Beijing, 100049, China
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9
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Wang F, Zhao W, Chen J, Zhou Y. Allelopathic inhibitory effect on the growth of microcystis aeruginosa by improved ultrasonic-cellulase extract of Vallisneria. CHEMOSPHERE 2022; 298:134245. [PMID: 35278451 DOI: 10.1016/j.chemosphere.2022.134245] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 02/16/2022] [Accepted: 03/04/2022] [Indexed: 06/14/2023]
Abstract
The unique and efficient characteristics of allelopathy in submerged plants make it an environmentally friendly method to control harmful algal blooms. Increased research focus has been placed on the improved allelochemical extraction methods of submerged plants because of their cost-utility relationships. In this study, the growth inhibition effect of Vallisneria extract on Microcystis aeruginosa (M. aeruginosa) cells through the combination of enzyme and ultrasonic-assisted extraction method was analyzed. By establishing a co-cultivation experiment, the growth indicators, photosynthetic system, and oxidative stress system of M. aeruginosa were determined. The reactive oxygen species (ROS) and superoxide dismutase (SOD) activity, as well as the catalase (CAT) and Malondialdehyde (MDA) levels of algal cells were found to have increased significantly after co-cultivation, which indicated that the Vallisneria ultrasonic-cellulase extract could induce oxidative stress in Microcystis aeruginosa cells. The Vallisneria extract could promote at low concentrations and inhibit at high concentrations on the growth of Microcystis aeruginosa. The effective suppression of growth of algae cells with the extract was observed at 5 g/L (fresh weight). The results showed that the Vallisneria ultrasonic-cellulase extract had a significant inhibitory effect on M. aeruginosa, making the effective ingredients a useful reference for algae inhibitors.
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Affiliation(s)
- Fan Wang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Wenjing Zhao
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Jiaqi Chen
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Yuhang Zhou
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
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10
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Wu D, Yang C, Zhang X, Hou X, Zhang S, Dai X, Zhang X, Igarashi Y, Luo F. Algicidal effect of tryptoline against Microcystis aeruginosa: Excess reactive oxygen species production mediated by photosynthesis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150719. [PMID: 34606873 DOI: 10.1016/j.scitotenv.2021.150719] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/27/2021] [Accepted: 09/27/2021] [Indexed: 05/26/2023]
Abstract
Cyanobacterial blooms significantly decrease water quality and can damage ecosystems and, as such, require efficient control methods. Algicidal bacteria and their associated substances are promising tools for controlling cyanobacterial blooms; however, their specific algicidal mechanisms remain unclear. Therefore, the current study sought to investigate the algicidal mechanism of tryptoline (1,2,3,4-tetrahydro-9 h-pyrido[3,4-b]indole) against Microcystis aeruginosa, with a specific focus on the contribution made by reactive oxygen species (ROS), the underlying mechanisms of ROS increase, as well as the photosystem response. Results show that the algicidal ratio of tryptoline significantly and positively correlates with algal ROS. Moreover, 93.79% of the algicidal ratio variation is attributed to ROS in the tryptoline group, while only 47.75% can be attributed to ROS in the tryptoline + N-acetyl-L-cysteine (NAC) group, where ROS are partially scavenged by NAC. In the presence of tryptoline, algicidal effect and ROS levels were significantly enhanced in the presence of light as compared to those in the dark (P < 0.001). Hence, the increase in ROS production attributed to tryptoline is primarily affected by the presence of light and photosynthesis. Additionally, tryptoline significantly reduces Fv/Fm, PIABS, ETo/RC, and the expression of psaB and psbA genes related to photosynthesis, while increasing Vj and DIo/RC (P < 0.05). These results suggest that tryptoline hinders algal photosynthesis by significantly decreasing photosynthetic efficiency and carbon assimilation, inhibiting photochemical electron transfer, and increasing closed reaction centers and energy loss. Moreover, following partial blockade of the photosynthetic electron transfer from QA to QB by diuron (3-(3-4-dichlorophenyl)-1,1-dimethylurea), the ROS of algae exposed to tryptoline is significantly decreased. Thus, tryptoline inhibits electron transfer downstream of QA, which increase the number of escaping electron and thereby increase ROS generation. Collectively, this study describes the algicidal mechanism of tryptoline against M. aeruginosa and highlights the critical factors associated with induction of algicidal activity.
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Affiliation(s)
- Donghao Wu
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, PR China
| | - Caiyun Yang
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, PR China
| | - Xian Zhang
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, PR China
| | - Xiping Hou
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, PR China
| | - Siqi Zhang
- State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, Department of Environmental Sciences and Engineering, College of Resource and Environment, Southwest University, Chongqing 400716, China
| | - Xianzhu Dai
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, PR China
| | - Xiaohui Zhang
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, PR China
| | - Yasuo Igarashi
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, PR China
| | - Feng Luo
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, PR China.
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11
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Del Mondo A, Sansone C, Brunet C. Insights into the biosynthesis pathway of phenolic compounds in microalgae. Comput Struct Biotechnol J 2022; 20:1901-1913. [PMID: 35521550 PMCID: PMC9052079 DOI: 10.1016/j.csbj.2022.04.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/04/2022] [Accepted: 04/14/2022] [Indexed: 01/18/2023] Open
Abstract
Microalgal PCs are important bioactive molecules beneficial for human health. Bioinformatic comparative exploration predicts PCs synthesis in microalgae. Ten groups of prokaryotic and eukaryotic microalgae reveal a conserved pathway core. Featured PCs can be restricted to diverse microalgae due to ecological implications.
Among the most relevant bioactive molecules family, phenolic compounds (PCs) are well known in higher plants, while their knowledge in microalgae is still scarce. Microalgae represent a novel and promising source of human health benefit compounds to be involved, for instance, in nutraceutical composition. This study aims to investigate the PCs biosynthetic pathway in the microalgal realm, exploring its potential variability over the microalgal biodiversity axis. A multistep in silico analysis was carried out using a selection of core enzymes from the pathway described in land plants. This study explores their presence in ten groups of prokaryotic and eukaryotic microalgae.. Analyses were carried out taking into account a wide selection of algal protein homologs, functional annotation of conserved domains and motifs, and maximum-likelihood tree construction. Results showed that a conserved core of the pathway for PCs biosynthesis is shared horizontally in all microalgae. Conversely, the ability to synthesize some subclasses of phenolics may be restricted to only some microalgal groups (i.e., Chlorophyta) depending on featured enzymes, such as the flavanone naringenin and other related chalcone isomerase dependent compounds.
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Affiliation(s)
- Angelo Del Mondo
- Stazione zoologica Anton Dohrn, sede Molosiglio Marina Acton, via ammiraglio F. Acton, 55., 80133 Napoli, Italy
- Corresponding author.
| | - Clementina Sansone
- Stazione zoologica Anton Dohrn, sede Molosiglio Marina Acton, via ammiraglio F. Acton, 55., 80133 Napoli, Italy
- Institute of Biomolecular Chemistry, CNR, via Campi Flegrei 34, Pozzuoli 80078, Na, Italy
| | - Christophe Brunet
- Stazione zoologica Anton Dohrn, sede Molosiglio Marina Acton, via ammiraglio F. Acton, 55., 80133 Napoli, Italy
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12
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Qian Y, He Y, Li H, Yi M, Zhang L, Zhang L, Liu L, Lu Z. Benzalkonium chlorides (C12) inhibits growth but motivates microcystins release of Microcystis aeruginosa revealed by morphological, physiological, and iTRAQ investigation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118305. [PMID: 34626715 DOI: 10.1016/j.envpol.2021.118305] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/24/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
Due to the large-scale outbreak of Corona Virus Disease (2019), amounts of disinfecting agents was regularly used in public environments and their potential toxicity towards organisms needed to be appreciated. Thus, one mostly used cationic disinfectant, benzalkonium chlorides (BAC(C12)), was selected to assess its potential toxicity one common cyanobacteria Microcystis aeruginosa (M. aeruginosa) in this study. The aims were to explore the toxic effect and mechanism of BAC (C12) on M. aeruginosa growth within 96 h via morphological, physiological, and the relative and absolute quantification (iTRAQ)-based quantitative proteomics variations. The results found that BAC(C12) significantly inhibited cell density of M. aeruginosa at concentrations from 1 mg/L to 10 mg/L, and the 96-h EC50 value was identified to be 3.61 mg/L. Under EC50 concentration, BAC(C12) depressed the photosynthesis activities of M. aeruginosa exhibited by 36% decline of the maximum quantum yield for primary photochemistry (Fv/Fm) value and denaturation of photosynthetic organelle, caused oxidative stress response displayed by the increase of three indexes including superoxide dismutase (SOD), malondialdehyde (MDA), and the intracellular reactive oxygen species (ROS), and destroyed the integrity of cell membranes demonstrated by TEM images and the increase of ex-cellular substances. Then, the iTRAQ-based proteomic analysis demonstrated that BAC(C12) depressed photosynthesis activities through inhibiting the expressions of photosynthetic protein and photosynthetic electron transport related proteins. The suppression of electron transport also led to the increase of superoxide radicals and then posed oxidative stress on cell. Meantime, the 63.63% ascent of extracellular microcystin production of M. aeruginosa was observed, attributing to the high expression of microcystin synthesis proteins and the damage of cell membrane. In sum, BAC(C12) exposure inhibited the growth of M. aeruginosa mainly by depressing photosynthesis, inducing oxidative stress, and breaking the cell membrane. And, it enhanced the release of microcystin from the cyanobacterial cells via up-regulating the microcystin synthesis proteins and inducing the membrane damage, which could enlarge its toxicity to aquatic species.
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Affiliation(s)
- Yao Qian
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Yixin He
- Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Hong Li
- Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Meiling Yi
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Lilan Zhang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing, 400045, China.
| | - Linjie Zhang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Li Liu
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China
| | - Zhaohui Lu
- National Joint Local Engineering Research Center for Shale Gas Exploration and Development, Chongqing Institute of Geology and Mineral Resources, Chongqing, 401120, China
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13
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Yu YX, Li Y, Wang HJ, Wu XD, Zhang M, Wang HZ, Hamilton DP, Jeppesen E. Submersed macrophyte restoration with artificial light-emitting diodes: A mesocosm experiment. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 228:113044. [PMID: 34863077 DOI: 10.1016/j.ecoenv.2021.113044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 11/26/2021] [Accepted: 11/28/2021] [Indexed: 06/13/2023]
Abstract
Urban lakes are important natural assets but are exposed to multiple stressors from human activities. Submersed macrophytes, a key plant group that helps to maintain clear-water conditions in lakes, tend to be scarce in urban lakes, particularly when they are eutrophic or hypertrophic, and their loss is linked, in part, to impaired underwater light climate. We tested if enhancing the underwater light conditions using light-emitting diodes (LEDs) could restore submersed macrophytes in urban lakes. Twelve mesocosms (1000 L each) were each planted with tape grass (Vallisneria natans) and monitored over three months (22 August-7 November), using a control and three artificial light intensity treatments (10, 50, and 100 µmol m-2 s-1). Compared with the control, the high light treatment (100 µmol m-2 s-1) had higher leaf number, maximum leaf length, and average leaf length (3.9, 5.8, and 2.8 times, respectively). Shoot number, leaf number, leaf dry mass, root dry mass, and photosynthetic photon flux density in the high-light treatment were significantly greater than the control, but root length and phytoplankton chlorophyll a were not related to plant growth variables and were low in all treatments. Periphyton chlorophyll a increased significantly with the plant growth variables (i.e., shoot number, leaf number, and maximum leaf length) and was high in the light treatments but did not hamper the growth of the macrophytes. These results indicate that LED light supplementation enables the growth of V. natans under eutrophic conditions, at least in the absence of fish as in our experiment, and that the method may have potential as a restoration method in urban lakes. Lake-scale studies are needed, however, to fully evaluate LED light supplementation under natural conditions where other stressors (e.g., fish grazing) may need to be controlled for successful restoration of urban lakes.
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Affiliation(s)
- Ye-Xin Yu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; College of Fisheries, Huazhong Agricultural University, Wuhan, China.
| | - Yan Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.
| | - Hai-Jun Wang
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, China.
| | - Xiao-Dong Wu
- College of Urban and Environmental Sciences, Hubei Normal University, Huangshi, China.
| | - Miao Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China.
| | - Hong-Zhu Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.
| | - David P Hamilton
- Australian Rivers Institute, Griffith University, Nathan, Australia.
| | - Erik Jeppesen
- Department of Bioscience and WATEC, Aarhus University, Vejlsøvej, Silkeborg, Denmark; Limnology Laboratory, Department of Biological Sciences, Middle East Technical University, Ankara, Turkey; Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, Beijing, China; Centre for Ecosystem Research and Implementation (EKOSAM), Middle East Technical University, Ankara, Turkey; Institute of Marine Sciences, Middle East Technical University, Mersin, Turkey.
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14
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Yoon H, Kim HC, Kim S. Long-term seasonal and temporal changes of hydrogen peroxide from cyanobacterial blooms in fresh waters. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 298:113515. [PMID: 34403920 DOI: 10.1016/j.jenvman.2021.113515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 06/13/2023]
Abstract
In water, hydrogen peroxide (H2O2) is produced through abiotic and biotic reactions with organic matter, including algal cells. The production of H2O2 is influenced by harmful algal cell communities and toxicity. However, only a few studies have been conducted on H2O2 concentrations in natural water. Particularly, the seasonal and temporal patterns of H2O2 concentration suggest that H2O2 generation from aquatic microorganisms could be identified to compare of photochemical production from dissolved organic matter. Study area is a source of raw water and is a large artificial lake located near a metropolitan city. Due to various environmental conditions, harmful algal blooms frequently occur in summer. The purpose of this study was to trace the H2O2 concentration and water quality parameters of study area where algal bloom occurs and what factors directly affect the H2O2 concentration. Experiments were performed on the influencing factors via water samples from study area and lab-scale culture tank. The lake produces an average of 553 nM H2O2, which increases by more than three times (1460 nM) in summer compared the winter. The lake (18.6-23.8 nMh-1) produced more H2O2 than streams (7.4-9.0 nMh-1) during daylight hours. All water sites presented the lowest production rates in dark conditions (1.1-1.5 nMh-1). Daytime environment increased the generation rate more than the nighttime. The trend of H2O2 produced by algal cells was similar to that of the growth of algal cells. The exposure to external substances (heavy metals and antibiotics) increased the incidence by approximately five times; antibiotics were more influential than heavy metals.
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Affiliation(s)
- Hyojik Yoon
- Program in Environmental Technology and Policy, Korea University, Sejong 30019, Republic of Korea; Department of Environmental Engineering, College of Science and Technology, Korea University, Sejong 30019, Republic of Korea
| | - Hyun-Chul Kim
- Research Institute for Advanced Industrial Technology, College of Science and Technology, Korea University, Sejong 30019, Republic of Korea
| | - Sungpyo Kim
- Program in Environmental Technology and Policy, Korea University, Sejong 30019, Republic of Korea; Department of Environmental Engineering, College of Science and Technology, Korea University, Sejong 30019, Republic of Korea.
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15
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Rai R, Singh S, Rai KK, Raj A, Sriwastaw S, Rai LC. Regulation of antioxidant defense and glyoxalase systems in cyanobacteria. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 168:353-372. [PMID: 34700048 DOI: 10.1016/j.plaphy.2021.09.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 09/09/2021] [Accepted: 09/28/2021] [Indexed: 05/19/2023]
Abstract
Oxidative stress is common consequence of abiotic stress in plants as well as cyanobacteria caused by generation of reactive oxygen species (ROS), an inevitable product of respiration and photosynthetic electron transport. ROS act as signalling molecule at low concentration however, when its production exceeds the endurance capacity of antioxidative defence system, the organisms suffer oxidative stress. A highly toxic metabolite, methylglyoxal (MG) is also produced in cyanobacteria in response to various abiotic stresses which consequently augment the ensuing oxidative damage. Taking recourse to the common lineage of eukaryotic plants and cyanobacteria, it would be worthwhile to explore the regulatory role of glyoxalase system and antioxidative defense mechanism in combating abiotic stress in cyanobacteria. This review provides comprehensive information on the complete glyoxalase system (GlyI, GlyII and GlyIII) in cyanobacteria. Furthermore, it elucidates the recent understanding regarding the production of ROS and MG, noteworthy link between intracellular MG and ROS and its detoxification via synchronization of antioxidants (enzymatic and non-enzymatic) and glyoxalase systems using glutathione (GSH) as common co-factor.
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Affiliation(s)
- Ruchi Rai
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Shilpi Singh
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Krishna Kumar Rai
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Alka Raj
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Sonam Sriwastaw
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - L C Rai
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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16
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Li D, Kang X, Chu L, Wang Y, Song X, Zhao X, Cao X. Algicidal mechanism of Raoultella ornithinolytica against Microcystis aeruginosa: Antioxidant response, photosynthetic system damage and microcystin degradation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117644. [PMID: 34426391 DOI: 10.1016/j.envpol.2021.117644] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 05/21/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
Water eutrophication caused by harmful algal blooms (HABs) occurs worldwide. It causes huge economic losses and has serious and potentially life-threatening effects on human health. In this study, the bacterium Raoultella sp. S1 with high algicidal efficiency against the harmful algae Microcystis aeruginosa was isolated from eutrophic water. The results showed that Raoultella sp. S1 initially flocculated the algae, causing the cells to sediment within 180 min and then secreted soluble algicidal substances that killed the algal cells completely within 72 h. The algicidal activity was stable across the temperature range -85.0 to 85.0 °C and across the pH range 3.00-11.00. Scanning electron microscopy (SEM) revealed the crumpling and fragmentation of cells algal cells during the flocculation and lysis stages. The antioxidant system was activated under conditions of oxidative stress, causing the increased antioxidant enzymes activities. Meanwhile, the oxidative stress response triggered by the algicidal substances markedly increased the malondialdehyde (MDA) and glutathione (GSH) content. We investigated the content of Chl-a and the relative expression levels of genes related to photosynthesis, verifying that the algicidal compounds attack the photosynthetic system by degrading the photosynthetic pigment and inhibiting the expression of key genes. Also, the results of photosynthetic efficiency and relative electric transport rate confirmed that the photosynthetic system in algal cells was severely damaged within 24 h. The algicidal effect of Raoultella sp. S1 against Microcystis aeruginosa was evaluated by analyzing the physiological response and photosynthetic system impairment of the algal cells. The concentration of microcystin-LR (MC-LR) slightly increased during the process of algal cells ruptured, and then decreased below its initial level due to the biodegradation of Raoultella sp. S1. To further investigate the algicidal mechanism of Raoultella sp. S1, the main components in the cell-free supernatant was analyzed by UHPLC-TOF-MS. Several low-molecular-weight organic acids might be responsible for the algicidal activity of Raoultella sp. S1. It is concluded that Raoultella sp. S1 has the potential to control Microcystis aeruginosa blooms.
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Affiliation(s)
- Dongpeng Li
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xin Kang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Linglong Chu
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Yifei Wang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xinshan Song
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xiaoxiang Zhao
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xin Cao
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
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17
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Lourenção A, Mecina GF, Cordeiro-Araújo MK, Bittencourt-Oliveira MC, Chia MA, Bronzel-Júnior JL, Granero FO, Silva LP, da Silva RMG. Characterization of allelochemicals from Pistia stratiotes extracts and their effects on the growth and physiology of Microcystis aeruginosa. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:57248-57259. [PMID: 34086172 DOI: 10.1007/s11356-021-14658-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 05/27/2021] [Indexed: 06/12/2023]
Abstract
Due to the public and environmental health impact of cyanotoxins, investigations have been focused on finding environmental friendly algaecides from aquatic plants. The present study had the objective to evaluate the population control and physiological response of Microcystis aeruginosa (Kützing) Kützing (strain BCCUSP232) exposed to Pistia stratiotes L. extracts. Aqueous and ethanolic extracts of P. stratiotes at different concentrations (10, 25, and 50 mg L-1) were submitted to M. aeruginosa and reduced significantly (p<0.05) the cyanobacterium cell density. The ethanolic extract presented the greatest growth inhibition of the strain at the highest concentration. During exposure to P. stratiotes extracts, intracellular hydrogen peroxide levels, malondialdehyde content, and antioxidant enzymes (peroxidase, catalase, and glutathione S-transferase) activities increased in M. aeruginosa, while total protein concentration decreased when compared to the control group. Superoxide dismutase (SOD) activities presented a sharp decline, suggesting superoxide radical and peroxide accumulation. This implied that SOD was a target for bioactive substance(s) from aqueous and ethanolic extracts of P. stratiotes. Phytochemical screening of the extracts revealed that the ethanolic extract presented 93.36 mg gallic acid equivalent (GAE) per gram dry weight (g-1 DW) total polyphenols and 217.33 mg rutin equivalent (RE) per gram dry weight total flavonoids, and for the aqueous extract, 5.19 mg GAE g-1 DW total polyphenols and 11.02 mg RE g-1 DW total flavonoids were detected. Gas chromatography (GC)/mass spectrometry (MS) analyses of the ethanolic and aqueous extracts presented palmitic acid ethyl ester as major allelochemical. In view of these results, it can be concluded that P. stratiotes showed potential in controlling M. aeruginosa populations.
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Affiliation(s)
- Anderson Lourenção
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Gustavo F Mecina
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Micheline K Cordeiro-Araújo
- Department of Biological Sciences, Luiz de Queiroz College of Agriculture, University of São Paulo (USP), Piracicaba, São Paulo, Brazil
| | - Maria C Bittencourt-Oliveira
- Department of Biological Sciences, Luiz de Queiroz College of Agriculture, University of São Paulo (USP), Piracicaba, São Paulo, Brazil
| | - Mathias A Chia
- Department of Botany, Ahmadu Bello University, Zaria, Nigeria
| | - João L Bronzel-Júnior
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Filipe O Granero
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Luciana P Silva
- Fundação Educacional do Município de Assis (FEMA), Assis, São Paulo, Brazil
| | - Regildo M G da Silva
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil.
- Laboratory of Herbal Medicine and Natural Products, Department of Biotechnology, School of Sciences, Humanities and Languages, São Paulo State University (UNESP), Dom Antonio Avenue 2100, 19806-900, Assis, São Paulo, Brazil.
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18
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Han J, Yin Y, Xu D, Wang H, Yu S, Han D, Niu Y, Xu R. Growth inhibition and oxidative damage of Microcystis aeruginosa induced by aqueous extract of different submerged macrophytes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:53224-53238. [PMID: 34023990 DOI: 10.1007/s11356-021-14459-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
With the increasing eutrophication of the aquatic environments, cyanobacteria blooms caused certain damage to the animals and plants in the aquatic environments. In this experiment, two species were selected from six species of submerged macrophytes, the experimental conditions were changed to achieve the best inhibitory effect on Microcystis aeruginosa, and oxidative damage analysis was carried out. The experiment results demonstrated that the inhibition rate of Vallisneria natans and Ceratophyllum demersum was nearly 100% at the concentration of 3 g/L after 15 days of anaerobic soaking extract. In addition, the longer the soaking time of the two submerged macrophytes, the weaker the photosynthesis effect, and the lower the chlorophyll fluorescence parameters, the more obvious the inhibition effect on M. aeruginosa. Lipid peroxidation injury of M. aeruginosa could be reflected by malondialdehyde (MDA) concentration. The MDA concentration in the experimental group was significantly higher than the control group. Results showed that V. natans and C. demersum could induce oxidative damage in M. aeruginosa. It was also observed that the secondary metabolites produced by V. natans were mainly fatty acids (e.g., the oxidative acid was 6.92 w/%, and the successful acid was 9.85 w/%) which inhibited M. aeruginosa in gas chromatography-mass spectrometry (GC-MS). The main secondary metabolites in C. demersum were hydroxyl acids (e.g., the 4-hydroxy-3-methoxyphenylacetic acid was 24.33 w/%), which could inhibit the algae through allelopathy. This study provided reference for submerged macrophytes to inhibit M. aeruginosa under different conditions.
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Affiliation(s)
- Jinlong Han
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063000, People's Republic of China
| | - Yue Yin
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063000, People's Republic of China
- North China University of Science and Technology Affiliated Hospital, Tangshan, 063000, People's Republic of China
| | - Duo Xu
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063000, People's Republic of China
| | - Hao Wang
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063000, People's Republic of China.
| | - Shuang Yu
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063000, People's Republic of China
| | - Dongyun Han
- College of Chemical Engineering, North China University of Science and Technology, Tangshan, 063000, People's Republic of China
| | - Yunxia Niu
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063000, People's Republic of China
| | - Runyu Xu
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063000, People's Republic of China
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19
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Rani V, Maróti G. Assessment of Nitrate Removal Capacity of Two Selected Eukaryotic Green Microalgae. Cells 2021; 10:cells10092490. [PMID: 34572139 PMCID: PMC8469671 DOI: 10.3390/cells10092490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/06/2021] [Accepted: 09/17/2021] [Indexed: 11/16/2022] Open
Abstract
Eutrophication is a leading problem in water bodies all around the world in which nitrate is one of the major contributors. The present study was conducted to study the effects of various concentrations of nitrate on two eukaryotic green microalgae, Chlamydomonas sp. MACC-216 and Chlorella sp. MACC-360. For this purpose, both microalgae were grown in a modified tris-acetate-phosphate medium (TAP-M) with three different concentrations of sodium nitrate, i.e., 5 mM (TAP-M5), 10 mM (TAP-M10) and 15 mM (TAP-M15), for 6 days and it was observed that both microalgae were able to remove nitrate completely from the TAP-M5 medium. Total amount of pigments decreased with the increasing concentration of nitrate, whereas protein and carbohydrate contents remained unaffected. High nitrate concentration (15 mM) led to an increase in lipids in Chlamydomonas sp. MACC-216, but not in Chlorella sp. MACC-360. Furthermore, Chlamydomonas sp. MACC-216 and Chlorella sp. MACC-360 were cultivated for 6 days in synthetic wastewater (SWW) with varying concentrations of nitrate where both microalgae grew well and showed an adequate nitrate removal capacity.
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Affiliation(s)
- Vaishali Rani
- Faculty of Science and Informatics, University of Szeged, 6720 Szeged, Hungary;
- Biological Research Centre, Institute of Plant Biology, 6726 Szeged, Hungary
| | - Gergely Maróti
- Biological Research Centre, Institute of Plant Biology, 6726 Szeged, Hungary
- Correspondence:
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20
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Lv M, Yuan M, Wang Y, Tang X, Zhao Y. Allelopathic effects of Ulva linza on marine phytoplankton and identification of the allelochemicals. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:45714-45723. [PMID: 33877523 DOI: 10.1007/s11356-021-13734-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/26/2021] [Indexed: 06/12/2023]
Abstract
Green tides have been increasing in frequency and severity in coastal areas in recent years, and thus, the adverse effects of green tides on the environment have attracted much research attention. Allelopathy is one of the most significant effects of green tide algae on the surrounding organisms. In this study, a series of experiments were developed to fully investigate the allelopathic effects of the green tide alga Ulva linza on two common coastal phytoplankton species and to isolate and identify the chemical compositions of the allelochemicals. Our results indicated that the fresh tissue, dry powder, and aqueous extracts all inhibited the population growth of the two experimental phytoplankton species, indicating the occurrence of allelopathy; further analysis of the allelochemicals identified multiple kinds of fatty acids as allelopathic compounds, in which the most abundant ones were hexadecanoic acid; 9Z, 12Z, 15Z-octadecatetrienoic acid; and 9E-octadecenoic acid. Our findings enrich the database for research on allelopathy between marine green tide algae and phytoplankton. Both algae and phytoplankton could increase their own competitive abilities during bloom formation, thereby changing the phytoplankton community structure.
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Affiliation(s)
- Mengchen Lv
- Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, No. 5 Yu Shan Road, Qingdao, Shandong, People's Republic of China, 266003
| | - Mengqi Yuan
- Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, No. 5 Yu Shan Road, Qingdao, Shandong, People's Republic of China, 266003
| | - Ying Wang
- Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, No. 5 Yu Shan Road, Qingdao, Shandong, People's Republic of China, 266003
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Xuexi Tang
- Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, No. 5 Yu Shan Road, Qingdao, Shandong, People's Republic of China, 266003
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Yan Zhao
- Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, No. 5 Yu Shan Road, Qingdao, Shandong, People's Republic of China, 266003.
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
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21
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Huang S, Zhu J, Zhang L, Peng X, Zhang X, Ge F, Liu B, Wu Z. Combined Effects of Allelopathic Polyphenols on Microcystis aeruginosa and Response of Different Chlorophyll Fluorescence Parameters. Front Microbiol 2020; 11:614570. [PMID: 33335524 PMCID: PMC7736180 DOI: 10.3389/fmicb.2020.614570] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 11/12/2020] [Indexed: 11/25/2022] Open
Abstract
Polyphenols are allelochemicals secreted by aquatic plants that effectively control cyanobacteria blooms. In this study, sensitive response parameters (including CFPs) of Microcystis aeruginosa were explored under the stress of different polyphenols individually and their combination. The combined effects on M. aeruginosa were investigated based on the most sensitive parameter and cell densities. For pyrogallic acid (PA) and gallic acid (GA), the sensitivity order of parameters based on the EC50 values (from 0.73 to 3.40 mg L–1 for PA and from 1.05 to 2.68 mg L–1 for GA) and the results of the hierarchical cluster analysis showed that non-photochemical quenching parameters [NPQ, qN, qN(rel) and qCN] > photochemical quenching parameters [YII, qP, qP(rel) and qL] or others [Fv/Fm, F’v/F’m, qTQ and UQF(rel)] > cell densities. CFPs were not sensitive to ellagic acid (EA) and (+)-catechin (CA). The sensitivity order of parameters for M. aeruginosa with PA-GA mixture was similar to that under PA and GA stress. The quantitative (Toxicity Index, TI) and qualitative (Isobologram representation) methods were employed to evaluate the combined effects of PA, GA, and CA on M. aeruginosa based on cell densities and NPQ. TI values based on the EC50 cells suggested the additive effects of binary and multiple polyphenols, but synergistic and additive effects according to the EC50 NPQ (varied from 0.16 to 1.94). In terms of NPQ of M. aeruginosa, the binary polyphenols exhibited synergistic effects when the proportion of high toxic polyphenols PA or GA was lower than 40%, and the three polyphenols showed a synergistic effect only at the ratio of 1:1:1. Similar results were also found by isobologram representation. The results showed that increasing the ratio of high toxic polyphenols would not enhance the allelopathic effects, and the property, proportion and concentrations of polyphenols played an important role in the combined effects. Compared with cell densities, NPQ was a more suitable parameter as evaluating indicators in the combined effects of polyphenols on M. aeruginosa. These results could provide a method to screen the allelochemicals of polyphenols inhibiting cyanobacteria and improve the inhibitory effects by different polyphenols combined modes.
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Affiliation(s)
- Suzhen Huang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Junying Zhu
- Sinopec Research Institute of Petroleum Processing, Beijing, China
| | - Lu Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Xue Peng
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xinyi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Fangjie Ge
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Biyun Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
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Lv J, Liu G, Feng J, Liu Q, Nan F, Liu X, Xie S. Harvesting biomass of an oil-rich microalga Parachlorella kessleri TY02 by ferric chloride: Effects on harvesting efficiency, lipid production and municipal wastewater treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 273:111128. [PMID: 32736121 DOI: 10.1016/j.jenvman.2020.111128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 06/16/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
Inorganic coagulants have been widely used to harvest microalgal biomass. A great deal of attention has been mainly focused on the response of harvesting efficiency, lipid production and feasibility of the reuse of medium to inorganic coagulants. The physiological state of harvested cells and feasibility of wastewater treatment remain unclear. In this context, the effect of ferric chloride as a conventional inorganic coagulant on the harvesting efficiency, physiological state and lipid content of an oil-rich microalga Parachlorella kessleri TY02 was evaluated. Moreover, the performance of harvested cells for municipal wastewater treatment was also evaluated. When the dosage of iron ions was 0.077 mg/mg dry biomass and the sedimentation time was 5 min, the microalga had good harvesting efficiency and cell viability. As the dosage of iron ions was up to 0.15 mg/mg dry biomass, cell viability notably decreased. Cells harvested by 0.077 and 0.15 mg/mg dry biomass of iron ions showed good wastewater treatment efficiency. It was also found that long sedimentation time (40 min) not only did not promote harvesting efficiency, but also reduced cell viability. Iron ions had no notable effect on lipid content of the microalga. Through comprehensive evaluation of harvesting efficiency, lipid production, physiological state and wastewater treatment efficiency, it indicated that 0.077 mg/mg dry biomass of iron ions could be used to harvest biomass of the microalga.
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Affiliation(s)
- Junping Lv
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Guoji Liu
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Jia Feng
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Qi Liu
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Fangru Nan
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Xudong Liu
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Shulian Xie
- School of Life Science, Shanxi University, Taiyuan, 030006, China.
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Kugler A, Kumari P, Kokabi K, Itkin M, Malitsky S, Khozin-Goldberg I. Resilience to Freezing in the Vegetative Cells of the Microalga Lobosphaera incisa (Trebouxiophyceae, Chlorophyta). JOURNAL OF PHYCOLOGY 2020; 56:334-345. [PMID: 31715644 DOI: 10.1111/jpy.12948] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 10/28/2019] [Indexed: 06/10/2023]
Abstract
The chlorophyte microalga Lobosphaera incisa was isolated from the snowy slopes of Mt. Tateyama in Japan. This microalga stores exceptionally high amounts of the omega-6 LC-PUFA arachidonic acid in triacylglycerols, and therefore represents a potent photosynthetic source for this essential LC-PUFA. Assuming that freezing tolerance may play a role in adaptation of L. incisa to specific ecological niches, we examined the capability of L. incisa to tolerate extreme sub-zero temperatures. We report here, that the vegetative cells of L. incisa survived freezing at -20°C and -80°C (over 1 month), without cryoprotective agents or prior treatments. Cells successfully recovered upon thawing and proliferated under optimal growth conditions (25°C). However, cells frozen at -80°C showed better recovery and lower cellular ROS generation upon thawing, compared to those preserved at -20°C. Photosynthetic yield of PSII, estimated by Fv /Fm , temporarily decreased at day 1 post freezing and resumed to the original level at day 3. Interestingly, the thawed algal cultures produced a higher level of chlorophylls, exceeding the control culture. The polar metabolome of the vegetative cells comprised a range of compatible solutes, dominated by glutamate, sucrose, and proline. We posit that the presence of endogenous cryoprotectants, a rigid multilayer cell wall, the high LC-PUFA content in membrane lipids, and putative cold-responsive proteins may contribute to the retention of functionality upon recovery from the frozen state, and therefore for the survival under cryospheric conditions. From the applied perspective, this beneficial property holds promise for the cryopreservation of starter cultures for research and commercial purposes.
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Affiliation(s)
- Amit Kugler
- Microalgal Biotechnology Laboratory, French Associates Institute for Agriculture and Biotechnology of Drylands, J. Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, 8499000, Israel
| | - Puja Kumari
- Microalgal Biotechnology Laboratory, French Associates Institute for Agriculture and Biotechnology of Drylands, J. Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, 8499000, Israel
| | - Kamilya Kokabi
- Microalgal Biotechnology Laboratory, French Associates Institute for Agriculture and Biotechnology of Drylands, J. Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, 8499000, Israel
| | - Maxim Itkin
- Metabolic Profiling Unit, Life Science Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Sergey Malitsky
- Metabolic Profiling Unit, Life Science Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Inna Khozin-Goldberg
- Microalgal Biotechnology Laboratory, French Associates Institute for Agriculture and Biotechnology of Drylands, J. Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, 8499000, Israel
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24
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Bojadzija Savic G, Bormans M, Edwards C, Lawton L, Briand E, Wiegand C. Cross talk: Two way allelopathic interactions between toxic Microcystis and Daphnia. HARMFUL ALGAE 2020; 94:101803. [PMID: 32414501 DOI: 10.1016/j.hal.2020.101803] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 03/31/2020] [Accepted: 04/02/2020] [Indexed: 06/11/2023]
Abstract
Due to eutrophication, freshwater ecosystems frequently experience cyanobacterial blooms, many of which produce bioactive metabolites that can affect vertebrates and invertebrates life traits. Zooplankton are able to develop tolerance as a physiological response to cyanobacteria and their bioactive compounds, however, this comes with energetic cost that in turn influence Daphnia life traits and may impair populations. Vice versa, it has been suggested that Daphnia are able to reduce cyanobacterial dominance until a certain cyanobacterial density; it remains unclear whether Daphnia metabolites alone influence the physiological state and bioactive metabolites production of cyanobacteria. Hence, this study investigates mutual physiological reactions of toxic Microcystis aeruginosa PCC7806 and Daphnia magna. We hypothesize that a) the presence of D. magna will negatively affect growth, increase stress response and metabolites production in M. aeruginosa PCC7806 and b) the presence of M. aeruginosa PCC7806 will negatively affect physiological responses and life traits in D. magna. In order to test these hypotheses experiments were conducted in a specially designed co-culture chamber that allows exchange of the metabolites without direct contact. A clear mutual impact was evidenced. Cyanobacterial metabolites reduced survival of D. magna and decreased oxidative stress enzyme activity. Simultaneously, presence of D. magna did not affect photosynthetic activity. However, ROS increase and tendencies in cell density decrease were observed on the same day, suggesting possible energy allocation towards anti-oxidative stress enzymes, or other protection mechanisms against Daphnia infochemicals, as the strain managed to recover. Elevated concentration of intracellular and overall extracellular microcystin MC-LR, as well as intracellular concentrations of aerucyclamide A and D in the presence of Daphnia, indicating a potential protective or anti-grazing function. However, more research is needed to confirm these findings.
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Affiliation(s)
| | - Myriam Bormans
- Univ Rennes 1, CNRS, ECOBIO - UMR 6553, F-35000 Rennes, France
| | - Christine Edwards
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen AB10 7GJ, United Kingdom
| | - Linda Lawton
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen AB10 7GJ, United Kingdom
| | - Enora Briand
- Phycotoxins Laboratory, IFREMER, F-44311 Nantes, France
| | - Claudia Wiegand
- Univ Rennes 1, CNRS, ECOBIO - UMR 6553, F-35000 Rennes, France
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25
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Liu R, Deng Y, Zhang W, Zhang L, Wang Z, Li B, Diao J, Zhou Z. Enantioselective mechanism of toxic effects of triticonazole against Chlorella pyrenoidosa. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 185:109691. [PMID: 31563746 DOI: 10.1016/j.ecoenv.2019.109691] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/14/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
The rational use and the environmental safety of chiral pesticides have attracted significant research interest. Here, enantioselective toxic effects and the selective toxic mechanism of triticonazole (TRZ) against the aquatic microalgae Chlorella pyrenoidosa were studied. The 96h-EC50 values of rac-, (R)-(-)-, and (S)-(+)-TRZ were 1.939, 0.853, and 22.002 mg/L, respectively. At a concentration of 1 mg/L, the contents of photosynthetic pigments of C. pyrenoidosa exposed to (R)-(-)-TRZ were lower than if exposed to S-(+)-form and racemate. Transmission electron microscopic images showed that the R-(-)-form compromised the integrity of cells and disrupted the chloroplast structure. R-(-)-TRZ stimulated vast reactive oxygen species (ROS) and significantly increased superoxide dismutase (SOD) and catalase (CAT) activities, as well as malondialdehyde (MDA) content. For lipid accumulation experiments, nicotinamide adenine dinucleotide (NADH) and triacylglycerol (TAG) accumulations in algal cells treated with R-(-)-TRZ were 171.50% and 280.76%, respectively, compared with the control group. This far exceeded levels of algal cells treated with S-(+)- and rac-TRZ. Based on these data, R-(-)-TRZ was concluded to selectively affect the photosynthetic system, antioxidant system, and lipid synthesis of algal cells, thus causing enantioselective toxic effects of TRZ against C. pyrenoidosa, which indicating that the use of racemate may cause unpredictable environmental harm. Therefore, to reduce the hidden dangers of chiral pesticides for the ecological environment, the environmental risk of TRZ should be evaluated at the stereoselective level.
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Affiliation(s)
- Rui Liu
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Yue Deng
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Wenjun Zhang
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Luyao Zhang
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Zikang Wang
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Bingyan Li
- College of Agronomy, Shanxi Agricultural University, Mingxian South Road 1, Shanxi, 030800, China
| | - Jinling Diao
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Zhiqiang Zhou
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing, 100193, China.
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Müller S, Zavřel T, Červený J. Towards a quantitative assessment of inorganic carbon cycling in photosynthetic microorganisms. Eng Life Sci 2019; 19:955-967. [PMID: 32624985 PMCID: PMC6999069 DOI: 10.1002/elsc.201900061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 08/30/2019] [Accepted: 09/22/2019] [Indexed: 11/20/2022] Open
Abstract
Photosynthetic organisms developed various strategies to mitigate high light stress. For instance, aquatic organisms are able to spend excessive energy by exchanging dissolved CO2 (dCO2) and bicarbonate ( HCO 3 - ) with the environment. Simultaneous uptake and excretion of the two carbon species is referred to as inorganic carbon cycling. Often, inorganic carbon cycling is indicated by displacements of the extracellular dCO2 signal from the equilibrium value after changing the light conditions. In this work, we additionally use (i) the extracellular pH signal, which requires non- or weakly-buffered medium, and (ii) a dynamic model of carbonate chemistry in the aquatic environment to detect and quantitatively describe inorganic carbon cycling. Based on simulations and experiments in precisely controlled photobioreactors, we show that the magnitude of the observed dCO2 displacement crucially depends on extracellular pH level and buffer concentration. Moreover, we find that the dCO2 displacement can also be caused by simultaneous uptake of both dCO2 and HCO 3 - (no inorganic carbon cycling). In a next step, the dynamic model of carbonate chemistry allows for a quantitative assessment of cellular dCO2, HCO 3 - , and H+ exchange rates from the measured dCO2 and pH signals. Limitations of the method are discussed.
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Affiliation(s)
- Stefan Müller
- Faculty of MathematicsUniversity of ViennaWienAustria
| | - Tomáš Zavřel
- Department of Adaptive BiotechnologiesGlobal Change Research Institute of the Czech Academy of SciencesBrnoCzech Republic
| | - Jan Červený
- Department of Adaptive BiotechnologiesGlobal Change Research Institute of the Czech Academy of SciencesBrnoCzech Republic
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27
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Misaki K, Matsuda S, Matsuda T, Kusakabe T, Shimizu Y. Detection of DNA damage formation by natural organic matter using EGFP-fused MDC1-expressing cells. CHEMOSPHERE 2019; 235:169-174. [PMID: 31255757 DOI: 10.1016/j.chemosphere.2019.06.126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 06/13/2019] [Accepted: 06/17/2019] [Indexed: 06/09/2023]
Abstract
Studies have been conducted on the genotoxicity and carcinogenicity of disinfection by-products formed from natural organic matter (NOM) and mitigation effect for mutagens and clastogens by NOM. Whereas, reportedly, synthetic humic acid in high concentration has induced genotoxicity in human cells, and NOM samples have provoked mild oxidative and other physiological responses in aquatic organisms. Our group developed a novel detection method for DNA damage formation, namely enhanced green fluorescent protein (EGFP)-fused mediator of DNA damage checkpoint 1 (MDC1)-expressing human cells as simple and high-sensitive system. By using this method, a significant increase in the foci area was observed after 3 h, but not 24 h for 130 mgC L-1 Suwannee River fulvic acid (SRFA), 38 mgC L-1 humic acid (SRHA), and 19 mgC L-1 NOM (SRNOM). The SRNOM concentration is the original environmental one; therefore, it was suggested that the formation and repair of DNA damage associated with γ-H2AX, a biomarker for DNA double-strand breaks by mild oxidative stress, in Suwannee River (SR) were detected for the first time. The increase in the foci area was not observed for 18 mgC L-1 Lake Biwa fulvic acid (LBFA) and 50 mg L-1 catechin after both 3 h and 24 h. The difference between the SR and Lake Biwa (LB) samples may result from the differences in their electron-accepting capacity. The application of this methodology is expected to elucidate oxidative stress and toxicological effects shortly and in detail for many water samples.
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Affiliation(s)
- Kentaro Misaki
- Research Center for Environmental Quality Management (RCEQM), Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, Japan; School of Nursing, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, Japan.
| | - Shun Matsuda
- Research Center for Environmental Quality Management (RCEQM), Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, Japan
| | - Tomonari Matsuda
- Research Center for Environmental Quality Management (RCEQM), Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, Japan
| | - Taketoshi Kusakabe
- Research Center for Environmental Quality Management (RCEQM), Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, Japan
| | - Yoshihisa Shimizu
- Research Center for Environmental Quality Management (RCEQM), Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, Japan
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28
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Zhang H, Zhao Y, Yin H, Wang Y, Li H, Wang Z, Geng Y, Liang W, Wang H. Effect of aquatic macrophyte growth on landscape water quality improvement. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:33791-33803. [PMID: 29881960 DOI: 10.1007/s11356-018-2421-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 05/25/2018] [Indexed: 06/08/2023]
Abstract
The water of urban landscape park is often confronted with microalgal blooms due to its stagnancy. Bioremediation using the combined emergent and submerged plants to control the microalgae growth was investigated in the present study. Two water bodies (Bei and Xin) of Yuyuantan Park in Beijing were selected for the field experiments, and the other lakes with different vegetation of macrophytes were selected as the comparison. The concentrations of chlorophyll a (chl a), chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP), and water temperature and transparency were monitored before and after bioremediation from 2015 to 2017. Results showed that the effects of microalgal inhibition were more significant 2 years after bioremediation. Specifically, the chl a of Dong Lake without any vegetation of macrophytes was up to 65.1 μg/L in summer of 2017, while the Bei and Xin Lakes was only 6.2 and 11.3 μg/L, respectively. In addition, the water quality and transparency also improved, with water bodies being crystal clear. Submerged plants played major roles in microalgal control and water quality improvement, compared to the lakes with only emergent plants. The intensity of humic acid-like substances in three-dimensional fluorescent spectra was stronger for the lakes with submerged plants.
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Affiliation(s)
- Hengfeng Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China
| | - Yixi Zhao
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China
| | - Hang Yin
- School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Yuanyuan Wang
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China
| | - Huixian Li
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China
| | - Zhanshen Wang
- Yuyuantan Park Management Department of Beijing, Beijing, China
| | - Yongbo Geng
- Yuyuantan Park Management Department of Beijing, Beijing, China
| | - Wenyan Liang
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China.
| | - Hongjie Wang
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China.
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29
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Xinjie W, Xin N, Qilu C, Ligen X, Yuhua Z, Qifa Z. Vetiver and Dictyosphaerium sp. co-culture for the removal of nutrients and ecological inactivation of pathogens in swine wastewater. J Adv Res 2019; 20:71-78. [PMID: 31210986 PMCID: PMC6562367 DOI: 10.1016/j.jare.2019.05.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 05/04/2019] [Accepted: 05/16/2019] [Indexed: 11/20/2022] Open
Abstract
Swine wastewater poses chemical and biological risks because it contains high concentrations of ammonia and diverse species of pathogens. Herein, a vetiver-Dictyosphaerium sp. co-culture for the rapid removal of ammonia and the effective inactivation of pathogens was developed. Plants and microalgae benefited mutually and co-utilized the nutrients in the wastewater in the co-culture. The pathogens were inactivated by reactive oxygen species that were released by the microalgae as well as the supersaturated concentrations of dissolved oxygen in the enclosed bioreactor. In a greenhouse experiment, the time required for wastewater NH4-N to decrease from 102 mg L-1 to 5 mg L-1 was 65.5 days, 34.2 days, and 13.3 days in the plant culture, the algal culture, and the plant-algal co-culture, respectively. Among the 35 detected genera of bacteria, the operational taxonomic units for 31 tended to decrease with culture time in the plant-algal co-culture. Additionally, certain bacteria (e.g., Escherichia spp.) were completely removed by day 9 or 15, and the aerobic phototrophic bacterium Erythromicrobium spp. became most abundant on day 15 in the plant-algal co-culture. Important positive interactions that were observed between plants and microalgae included co-utilization of the nutrients, wastewater acidification through plant root respiration and algal growth with reduced ammonia toxicity, algal depletion of bicarbonate and alleviation of bicarbonate toxicity to plants, and release of oxygen from algal photosynthesis and plant growth with reduced hypoxic stress.
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Affiliation(s)
- Wang Xinjie
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China
- Fushan No. 1 Middle School, Qingdao 265500, China
| | - Ni Xin
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Cheng Qilu
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xu Ligen
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
- Huzhou Southern Taihu Lake Modern Agricultural Technology Center, Zhejiang University, Huzhou 313000, China
| | - Zhao Yuhua
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Zhou Qifa
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China
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Han SI, Kim S, Choi KY, Lee C, Park Y, Choi YE. Control of a toxic cyanobacterial bloom species, Microcystis aeruginosa, using the peptide HPA3NT3-A2. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:32255-32265. [PMID: 31598929 DOI: 10.1007/s11356-019-06306-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 08/26/2019] [Indexed: 06/10/2023]
Abstract
Microcystis aeruginosa, a species of freshwater cyanobacteria, is known to be one of the dominant species causing cyanobacterial harmful algal blooms (CyanoHABs). M. aeruginosa blooms have the potential to produce neurotoxins and peptide hepatotoxins, such as microcystins and lipopolysaccharides (LPSs). Currently, technologies for CyanoHAB control do not provide any ultimate solution because of the secondary pollution associated with the control measures. In this study, we attempted to use the peptide HPA3NT3-A2, which has been reported to be nontoxic and has antimicrobial properties, for the development of an eco-friendly control against CyanoHABs. HPA3NT3-A2 displayed significant algicidal effects against M. aeruginosa cells. HPA3NT3-A2 induced cell aggregation and flotation (thereby facilitating harvest), inhibited cell growth through sedimentation, and eventually destroyed the cells. HPA3NT3-A2 had no algicidal effect on other microalgal species such as Haematococcus pluvialis and Chlorella vulgaris. Additionally, HPA3NT3-A2 was not toxic to Daphnia magna. The algicidal mechanism of HPA3NT3-A2 was intracellular penetration. The results of this study suggest the novel possibility of controlling CyanoHABs using HPA3NT3-A2.
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Affiliation(s)
- Sang-Il Han
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Korea
| | - Sok Kim
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Korea
| | - Ki Young Choi
- School of Chemical Engineering, College of Engineering, Sungkyunkwan University, Suwon, 16419, Korea
| | - Changsu Lee
- Microbiology and Functionality Research Group, World Institute of Kimchi, Gwangju, 61755, Korea
| | - Yoonkyung Park
- Research Center for Proteinaceous Materials (RCPM), Chosun University, Gwangju, 61452, Korea.
| | - Yoon-E Choi
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Korea.
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31
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Kottuparambil S, Park J. Anthracene phytotoxicity in the freshwater flagellate alga Euglena agilis Carter. Sci Rep 2019; 9:15323. [PMID: 31653882 PMCID: PMC6814832 DOI: 10.1038/s41598-019-51451-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 09/28/2019] [Indexed: 12/28/2022] Open
Abstract
The freshwater flagellate alga Euglena agilis Carter was exposed to the polycyclic aromatic hydrocarbon (PAH) anthracene for 96 h under optimal photosynthetically active radiation (PAR), and responses of growth, photosynthetic pigment production, and photosynthetic efficiency were assessed. Anthracene reduced the growth rate (μ) and levels of chlorophyll a (Chl a), chlorophyll b (Chl b), and total carotenoids. The growth rate was more sensitive than photosynthetic parameters, with a median effective concentration (EC50) of 4.28 mg L-1. Between 5 and 15 mg L-1, anthracene inhibited the maximum quantum yield (Fv/Fm) of photosystem II (PSII) and the maximum photosynthetic electron transport rate through PSII (rETRmax) with EC50 values of 14.88 and 11.8 mg L-1, respectively. At all anthracene concentrations, intracellular reactive oxygen species (ROS) were elevated, indicating increased oxidative stress. Anthracene presumably reduced the PSII efficiency of photochemical energy regulation and altered the photochemistry through intracellular ROS formation. Acute exposure to PAHs may induce severe physiological changes in phytoplankton cells, which may influence vital ecological processes within the aquatic environments. Additionally, growth and Chl a content may serve as sensitive risk assessment parameters of anthracene toxicity in water management since EC50 values for both overlap with anthracene levels (8.3 mg L-1) permitted by the US Environmental Protection Agency (USEPA).
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Affiliation(s)
- Sreejith Kottuparambil
- Red Sea Research Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Jihae Park
- Ghent University Global Campus, Songomunhwa-Ro, 119, Yeonsu-gu, Incheon, 21985, Republic of Korea.
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Guzzetti E, Salabery E, Ferriol P, Díaz JA, Tejada S, Faggio C, Sureda A. Oxidative stress induction by the invasive sponge Paraleucilla magna growing on Peyssonnelia squamaria algae. MARINE ENVIRONMENTAL RESEARCH 2019; 150:104763. [PMID: 31349161 DOI: 10.1016/j.marenvres.2019.104763] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/11/2019] [Accepted: 07/19/2019] [Indexed: 06/10/2023]
Abstract
The introduction of invasive species can lead to significant adverse effects on the colonized areas. The aim of the present research was to determine if the invasive behavior of Paraleucilla magna could induce the activation of the antioxidant defences in the native red algae, Peyssonnelia squamaria. Individuals of isolated P. squamaria and individuals epiphytized by P. magna, both growing on rocky bottoms, were collected. The activity of the antioxidant enzymes - catalase, superoxide dismutase, glutathione peroxidase and glutathione reductase - and the levels of the malondialdehyde were significantly higher in the algae of the epiphytic group compared to the control group, while the detoxifying enzyme glutathione S-transferase did not show significant differences. The levels of reduced glutathione and total polyphenols were higher in the algae affected by the sponge. In conclusion, the arrival of the species P. magna induces an adaptative antioxidant response in P. squamaria determined by the use of biomarkers.
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Affiliation(s)
- Eleonora Guzzetti
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, E-98166, Messina, Italy
| | - Eduardo Salabery
- Research Group on Community Nutrition and Oxidative Stress (NUCOX), Department of Fundamental Biology and Health Sciences, University of the Balearic Islands, E-07122, Palma de Mallorca, Spain
| | - Pere Ferriol
- Interdisciplinary Ecology Group, Biology Department, University of the Balearic Islands, E-07122, Palma de Mallorca, Spain
| | - Julio A Díaz
- Interdisciplinary Ecology Group, Biology Department, University of the Balearic Islands, E-07122, Palma de Mallorca, Spain; Instituto Español de Oceanografía, Centre Oceanogràfic de Balears, Palma de Mallorca, Spain
| | - Silvia Tejada
- Laboratory of Neurophysiology, Department of Biology, University of the Balearic Islands, E-07122, Palma de Mallorca, Spain; CIBEROBN (Physiopathology of Obesity and Nutrition), University of the Balearic Islands, E-07122, Palma de Mallorca, Spain
| | - Caterina Faggio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, E-98166, Messina, Italy
| | - Antoni Sureda
- Research Group on Community Nutrition and Oxidative Stress (NUCOX), Department of Fundamental Biology and Health Sciences, University of the Balearic Islands, E-07122, Palma de Mallorca, Spain; CIBEROBN (Physiopathology of Obesity and Nutrition), University of the Balearic Islands, E-07122, Palma de Mallorca, Spain.
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33
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Jia Y, Schmid C, Shuliakevich A, Hammers-Wirtz M, Gottschlich A, der Beek TA, Yin D, Qin B, Zou H, Dopp E, Hollert H. Toxicological and ecotoxicological evaluation of the water quality in a large and eutrophic freshwater lake of China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 667:809-820. [PMID: 30851614 DOI: 10.1016/j.scitotenv.2019.02.435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/27/2019] [Accepted: 02/27/2019] [Indexed: 06/09/2023]
Abstract
Effect-based methods (EBMs) are recommended as holistic approach for diagnosis and monitoring of water quality; however, the application of EBMs is still scare in China. In the present study, water quality of the freshwater lake Taihu (China) was investigated by EBMs. Different types of water samples were collected from three bays of the lake during 2015, 2016 and 2017. A battery of seven effect-based bioassays, including both specific and non-specific toxicity assays, was used. The bioassay battery was recently suggested based on joint activities of the EU project SOLUTIONS and the NORMAN network on emerging pollutants and is also under discussion for being implemented into monitoring activities in the context of the European Water Framework Directive (WFD). Adverse effects were observed towards the primary producer, primary consumer and fish, indicating the potential ecotoxicity of water in Taihu Lake. Mutagenic and estrogenic effects were found in the Ames fluctuation assay and ERα CALUX (Chemically Activated Luciferase Gene-eXpression) assay, respectively, highlighting the potential risks on human health. Algal growth inhibition and mutagenic effects can be observed during each of the three years. Acute toxicity towards Daphnia magna and estrogen receptor agonistic effects were found in at least one of the samples collected in 2016 and 2017, but not in 2015. The endpoints for fish toxicity in the Danio rerio fish embryo test included both lethal and additionally several sublethal effects (only for samples from 2017) and were not compared between years. Algal growth inhibition, fish embryo toxicity, mutagenic effect and estrogenicity were observed in each of the three bays, while Daphnia acute toxicity was only found in Zhushan Bay. Taking together, this study provides a big picture on the water quality of Taihu Lake. The battery of effect-based tools is promising to be a routine for water quality monitoring in China.
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Affiliation(s)
- Yunlu Jia
- RWTH Aachen University, ABBt- Aachen Biology and Biotechnology, Institute for Environmental Research, Department of Ecosystem Analysis, Aachen, Germany.
| | - Cora Schmid
- IWW Water Centre, Mülheim a.d. Ruhr, Germany; University Duisburg-Essen, Zentrum für Wasser- und Umweltforschung (ZWU), Germany
| | - Aliaksandra Shuliakevich
- RWTH Aachen University, ABBt- Aachen Biology and Biotechnology, Institute for Environmental Research, Department of Ecosystem Analysis, Aachen, Germany
| | - Monika Hammers-Wirtz
- Research Institute for Ecosystem Analysis and Assessment - gaiac, Aachen, Germany
| | | | | | - Daqiang Yin
- Tongji University, College of Environmental Science and Engineering and State Key Laboratory of Pollution Control and Resource Reuse, Shanghai, China
| | - Boqiang Qin
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China
| | - Hua Zou
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Elke Dopp
- IWW Water Centre, Mülheim a.d. Ruhr, Germany; University Duisburg-Essen, Zentrum für Wasser- und Umweltforschung (ZWU), Germany
| | - Henner Hollert
- RWTH Aachen University, ABBt- Aachen Biology and Biotechnology, Institute for Environmental Research, Department of Ecosystem Analysis, Aachen, Germany; Research Institute for Ecosystem Analysis and Assessment - gaiac, Aachen, Germany; Tongji University, College of Environmental Science and Engineering and State Key Laboratory of Pollution Control and Resource Reuse, Shanghai, China; Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing, China.
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Misaki K, Morita Y, Kobayashi K, Sugawara Y, Shimizu Y, Kusakabe T. Evaluation of algal photosynthesis inhibition activity for dissolved organic matter with the consideration of inorganic and coloring constituents. CHEMOSPHERE 2019; 224:333-342. [PMID: 30826703 DOI: 10.1016/j.chemosphere.2019.02.106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 06/09/2023]
Abstract
The effect of waterborne ingredient on ecosystem has been of great interest. In the present study, the evaluation method using algal photosynthesis inhibition assay with dual-channel pulse amplitude modulation (PAM) system was established for a series of water samples to elucidate the potential effect of the total body of organic compounds including natural organic matter (NOM) on aquatic ecosystems. The more sensitive and less time-consuming monitoring method compared with algal growth inhibition assay was suggested, especially considering inorganic and coloring constituents. Algal photosynthesis inhibition activity was detected with high sensitivity for photosystem II (PSII) inhibitors, whereas the IC10 of the other chemicals was over the environmental standard concentration for Chlamydomonas moewusii (Chlorophyceae) and Pheodactylum tricornutum (Diatomea). The photosynthesis inhibition activity of Lake Biwa dissolved organic matter (LBDOM) and fulvic acid (LBFA) was significantly detected at ≥10 times the concentration and >10 mgC L-1, respectively, whereas prominent activity was confirmed for Suwannee River NOM (SRNOM) on the river original concentration (>30 mgC L-1) for both algae. Significant inhibition activity was detected in both algae at least in twice-concentration for water samples from a wastewater treatment pilot plant. There was no great difference in the activity between sewage secondary effluent and its filtrate with ultrafiltration (UF), and physically washing water for the UF membrane.
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Affiliation(s)
- Kentaro Misaki
- Research Center for Environmental Quality Management (RCEQM), Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, Japan; School of Nursing, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, Japan.
| | - Yuhei Morita
- Research Center for Environmental Quality Management (RCEQM), Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, Japan
| | - Kentaro Kobayashi
- Global Environmental Research Laboratories, Toray Industries, Inc., 3-2-1 Sonoyama, Otsu, Shiga, Japan
| | - Yuichi Sugawara
- Water Treatment Technical Dept., Toray Industries, Inc., 3-3-3 Sonoyama, Otsu, Shiga, Japan
| | - Yoshihisa Shimizu
- Research Center for Environmental Quality Management (RCEQM), Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, Japan.
| | - Taketoshi Kusakabe
- Research Center for Environmental Quality Management (RCEQM), Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, Japan.
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35
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Mecina GF, Chia MA, Cordeiro-Araújo MK, Bittencourt-Oliveira MDC, Varela RM, Torres A, González Molinillo JM, Macías FA, da Silva RMG. Effect of flavonoids isolated from Tridax procumbens on the growth and toxin production of Microcystis aeruginos. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 211:81-91. [PMID: 30954847 DOI: 10.1016/j.aquatox.2019.03.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/14/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
The excessive proliferation of toxin producing cyanobacteria constitutes a significant health risk to the environment and humans. This is due to the contamination of potable water and accumulation of cyanotoxins in plant and animal tissues. As a means of controlling bloom forming cyanobacteria, secondary metabolites with pro-oxidative activities from plants are used to treat water bodies contaminated with cyanobacterial blooms and their associated toxins. The objective of the present study was to evaluate the mechanism of action of extract, fractions and isolated flavonoids of Tridax procumbens L. on Microcystis aeruginosa (Kützing) Kützing. by monitoring changes in growth, oxidative stress, antioxidant response, and cyanatoxin microcystins (MCs) production. The extract, fraction 3 and the isolated flavonoids significantly reduced the cell density of the cyanobacterium. Furthermore, the extract and fraction 3 increased the production of reactive oxygen species, induced lipid peroxidation, and altered antioxidant enzyme activities of M. aeruginosa. The total MCs content of the cyanobacterium was negatively affected by the presence of the extract, fractions and isolated flavonoids. The present study show that T. procumbens has secondary metabolites that are capable of interfering with the physiology and microcystins production of M. aeruginosa. These characteristics are promising for the control of this noxious cyanobacterium in aquatic ecosystems.
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Affiliation(s)
- Gustavo Franciscatti Mecina
- São Paulo State University (UNESP), School of Sciences, Humanities and Languages Assis, Department of Biotechnology, Laboratory of Herbal Medicine and Natural Products, Avenida Dom Antônio 2100, CEP: 19806-900, Assis, São Paulo, Brazil; São Paulo State University (UNESP), Institute of Chemistry, Rua Prof. Francisco Degni 55, CEP: 14800-060, Araraquara, São Paulo, Brazil
| | - Mathias Ahii Chia
- Department of Botany, Ahmadu Bello University, Zaria, 810001 Nigeria
| | - Micheline Kézia Cordeiro-Araújo
- Departamento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Maria do Carmo Bittencourt-Oliveira
- Departamento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Rosa Maria Varela
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional 6 (ceiA3), School of Science, University of Cadiz, C/República Saharaui 7, 11510, Puerto Real, Cadiz, Spain
| | - Ascensión Torres
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional 6 (ceiA3), School of Science, University of Cadiz, C/República Saharaui 7, 11510, Puerto Real, Cadiz, Spain
| | - José María González Molinillo
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional 6 (ceiA3), School of Science, University of Cadiz, C/República Saharaui 7, 11510, Puerto Real, Cadiz, Spain
| | - Francisco Antonio Macías
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional 6 (ceiA3), School of Science, University of Cadiz, C/República Saharaui 7, 11510, Puerto Real, Cadiz, Spain
| | - Regildo Márcio Gonçalves da Silva
- São Paulo State University (UNESP), School of Sciences, Humanities and Languages Assis, Department of Biotechnology, Laboratory of Herbal Medicine and Natural Products, Avenida Dom Antônio 2100, CEP: 19806-900, Assis, São Paulo, Brazil; São Paulo State University (UNESP), Institute of Chemistry, Rua Prof. Francisco Degni 55, CEP: 14800-060, Araraquara, São Paulo, Brazil.
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Xu P, Xiao E, Wu J, He F, Zhang Y, Wu Z. Enhanced nitrate reduction in water by a combined bio-electrochemical system of microbial fuel cells and submerged aquatic plant Ceratophyllum demersum. J Environ Sci (China) 2019; 78:338-351. [PMID: 30665653 DOI: 10.1016/j.jes.2018.11.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 09/29/2018] [Accepted: 11/13/2018] [Indexed: 06/09/2023]
Abstract
High nitrate (NO3-) loading in water bodies is a crucial factor inducing the eutrophication of lakes. We tried to enhance NO3- reduction in overlying water by coupling sediment microbial fuel cells (SMFCs) with submerged aquatic plant Ceratophyllum demersum. A comparative study was conducted by setting four treatments: open-circuit SMFC (Control), closed-circuit SMFC (SMFC-c), open-circuit SMFC with C. demersum (Plant), and closed-circuit SMFC with C. demersum (P-SMFC-c). The electrochemical parameters were documented to illustrate the bio-electrochemical characteristics of SMFC-c and P-SMFC-c. Removal pathways of NO3- in different treatments were studied by adding quantitative 15NO3- to water column. The results showed that the cathodic reaction in SMFC-c was mainly catalyzed by aerobic organisms attached on the cathode, including algae, Pseudomonas, Bacillus, and Albidiferax. The oxygen secreted by plants significantly improved the power generation of SMFC-c. Both electrogenesis and plants enhanced the complete removal of NO3- from the sediment-water system. The complete removal rates of added 15N increased by 17.6% and 10.2% for SMFC-c and plant, respectively, when compared with control at the end of experiment. The electrochemical/heterotrophic and aerobic denitrification on cathodes mainly drove the higher reduction of NO3- in SMFC-c and plant, respectively. The coexistence of electrogenesis and plants further increased the complete removal of NO3- with a rate of 23.1%. The heterotrophic and aerobic denitrifications were simultaneously promoted with a highest abundance of Flavobacterium, Bacillus, Geobacter, Pseudomonas, Rhodobacter, and Arenimonas on the cathode.
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Affiliation(s)
- Peng Xu
- College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Enrong Xiao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Junmei Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Feng He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Yi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
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37
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Meng Y, Wang S, Wang Z, Ye N, Fang H. Algal toxicity of binary mixtures of zinc oxide nanoparticles and tetrabromobisphenol A: Roles of dissolved organic matters. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 64:78-85. [PMID: 30308412 DOI: 10.1016/j.etap.2018.09.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 09/06/2018] [Accepted: 09/24/2018] [Indexed: 06/08/2023]
Abstract
The present study investigated the impacts of dissolved organic matters (DOM) on joint toxicity involved in zinc oxide nanoparticles (ZnO NPs) and tetrabromobisphenol A (TBBPA) at relevant low-exposure concentrations (<1 mg/L). It was found that ZnO NPs in single and combined systems exhibited severe inhibition effects on a freshwater microalgae Scenedesmus obliquus. However, the presence of DOM slightly alleviated the growth inhibition toxicity induced by the binary mixtures of ZnO NPs and TBBPA. Ultrastructure analysis revealed that ZnO NPs caused structural damage to cells, including plasmolysis, membrane destruction, and the disruption of thylakoid in the chloroplast, regardless of the presence of coexisting substances. Oxidative stress biomarker quantitative analysis and in situ observations indicated that the massive accumulation of reactive oxygen species in the binary mixtures of ZnO NPs and TBBPA caused severe oxidative damage, but the presence of DOM significantly mitigated the damage.
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Affiliation(s)
- Yue Meng
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, PR China
| | - Se Wang
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, PR China
| | - Zhuang Wang
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, PR China.
| | - Nan Ye
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, PR China
| | - Hao Fang
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, PR China
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38
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Chen Z, Tian Y, Zhu C, Liu B, Zhang Y, Lu Z, Zhou Q, Wu Z. Sensitive detection of oxidative DNA damage in cyanobacterial cells using supercoiling-sensitive quantitative PCR. CHEMOSPHERE 2018; 211:164-172. [PMID: 30071428 DOI: 10.1016/j.chemosphere.2018.06.154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/25/2018] [Accepted: 06/25/2018] [Indexed: 06/08/2023]
Abstract
Supercoiling-sensitive quantitative PCR (ss-qPCR) is a sensitive technique to detect DNA damage in cultured animal cells and cultured/clinical human cells in vitro. In this study, we investigated whether the ss-qPCR method can be applied as a sensitive means to detect oxidative DNA damage in unicellular organisms. We used the model cyanobacterium Synechococcus elongatus PCC 7942 as a test organism and H2O2 as an exogenetic oxidative toxicant. Results showed that a significant increase in the plasmid DNA damage of S. elongatus PCC 7942 was induced by H2O2 in a dose- and time-dependent manner. The sensitivity of ss-qPCR in detecting DNA damage of the cyanobacterium was higher than the cell inhibition method (up to 255 times) as calculated from the slopes of fitted curves in the tested sub-toxic concentration range of 1-5 mM H2O2. Ss-qPCR also detected repairable low-intensity DNA damage in the cyanobacterium when DNA repair inhibitors were used. The detection limit of modified ss-qPCR was one tenth of that of previous methods. We also observed that ss-qPCR can be used to detect genomic DNA conformation change of cyanobacterium exposed to H2O2. Thus, this method will provide a powerful technical support for investigating the mechanisms of cyanobacterial DNA damage by environmental factors, especially intracellular reactive oxygen species enhancement-related factors.
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Affiliation(s)
- Zhilan Chen
- Key Laboratory of Ecological Remediation and Safe Utilization of Heavy Metal-Polluted Soils, College of Hunan Province, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan 411201, China; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road 7, Wuhan 430072, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing, China; Hunan Province Key Laboratory of Coal Resources Clean-utilization and Mine Environment Protection, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan 411201, China
| | - Yun Tian
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road 7, Wuhan 430072, China
| | - Chenhong Zhu
- Key Laboratory of Ecological Remediation and Safe Utilization of Heavy Metal-Polluted Soils, College of Hunan Province, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan 411201, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing, China
| | - Biyun Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road 7, Wuhan 430072, China
| | - Yongyuan Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road 7, Wuhan 430072, China
| | - Zhiying Lu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road 7, Wuhan 430072, China
| | - Qiaohong Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road 7, Wuhan 430072, China.
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road 7, Wuhan 430072, China
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Patel A, Tiwari S, Prasad SM. Toxicity assessment of arsenate and arsenite on growth, chlorophyll a fluorescence and antioxidant machinery in Nostoc muscorum. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 157:369-379. [PMID: 29631092 DOI: 10.1016/j.ecoenv.2018.03.056] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 03/20/2018] [Accepted: 03/23/2018] [Indexed: 05/13/2023]
Abstract
The present study deals with impact of varied doses of arsenite (AsIII; 50, 100 and 150 µM) and arsenate (AsV; 50, 100 and 150 mM) on growth, photosynthetic pigments, photochemistry of photosystem II, oxidative biomarkers, (O2•¯, H2O2 and MDA equivalents contents) and activity of antioxidant enzymes in diazotrophic cyanobacterium Nostoc muscorum after 48 and 96 h of the treatments. The reduction in growth, pigment contents (Chl a, Phy and Car) and PS II photochemistry was found to increase with enhanced accumulation of test metal in cells, and the damaging effect on photosynthetic pigments showed the order (Phy > chl a> Car). The negative effect on PS II photochemistry was due to significant decrease in the value of JIP kinetics ϕP0, FV/F0, ϕE0,Ψ0 and PIABS except F0/FV and significant rise in values of energy flux parameters such as ABS/RC, TR0/RC, ET0/RC and DI0/RC. Both the species of arsenic caused significant rise in oxidative biomarkers as evident by in vitro and in vivo analysis of (O2•¯, H2O2 and MDA equivalents contents) despite of appreciable rise in the activity antioxidative enzymes such as SOD, POD, CAT and GST. The study concludes that in among both forms of arsenic, arsenite effect was more dominant on growth, photosynthetic pigments; oxidative stress biomarkers as evident by weak induction of anti-oxidative defense system to overcome the stress as compared to arsenate.
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Affiliation(s)
- Anuradha Patel
- Ranjan Plant physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Allahabad 211002, India
| | - Sanjesh Tiwari
- Ranjan Plant physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Allahabad 211002, India
| | - Sheo Mohan Prasad
- Ranjan Plant physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Allahabad 211002, India.
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Sathiya Deepika M, Thangam R, Sakthidhasan P, Arun S, Sivasubramanian S, Thirumurugan R. Combined effect of a natural flavonoid rutin from Citrus sinensis and conventional antibiotic gentamicin on Pseudomonas aeruginosa biofilm formation. Food Control 2018. [DOI: 10.1016/j.foodcont.2018.02.044] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Liu D, Liu H, Wang S, Chen J, Xia Y. The toxicity of ionic liquid 1-decylpyridinium bromide to the algae Scenedesmus obliquus: Growth inhibition, phototoxicity, and oxidative stress. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 622-623:1572-1580. [PMID: 29055581 DOI: 10.1016/j.scitotenv.2017.10.021] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 10/03/2017] [Accepted: 10/04/2017] [Indexed: 05/19/2023]
Abstract
Although ionic liquids (ILs) are unlikely to act as air contaminants, their high solubility and slow degradation make them a potential threat to the aquatic environment. The IL 1-decylpyridinium bromide ([DPy]Br) is a common type of pyridine IL, which has varied applications such as in extraction, separation, and catalytic synthesis. Herein, the toxicity of [DPy]Br to S. obliquus is determined. Growth was inhibited by high-concentration [DPy]Br, whereas it had a hormetic effect at low concentrations. The IC50-96h was approximately 0.06mg/L. The cell membrane permeability of S. obliquus increased with [DPy]Br concentration, indicating that [DPy]Br can cause damage to the algae cell structure. Chlorophyll content decreased at high [DPy]Br concentration; chlorophyll fluorescence parameters, such as the maximum effective quantum yield of PSII (Fv/Fm), potential activity of PSII (Fv/F0), yield of the photochemical quantum [Y(II)], and the non-photochemical quenching coefficient (NPQ) were affected, suggesting that [DPy]Br can damage PSII. The ROS fluorescent images revealed that the morphology of cells changed gradually from fusiform to round. High ROS levels were observed with high concentrations of [DPy]Br, indicating that [DPy]Br induced oxidative stress on S. obliquus. The SOD and CAT activities increased when the concentration was lower than IC50, whereas they decreased when the concentration was higher than IC50. The relative ROS content was significantly correlated with growth inhibition rate, cell membrane permeability, chlorophyll content, and SOD and CAT activities. The increase of ROS content in algal cells is an important toxicological mechanism of [DPy]Br to S. obliquus.
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Affiliation(s)
- Dingdong Liu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China
| | - Huijun Liu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China.
| | - Shengtao Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China
| | - Jiazheng Chen
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China
| | - Yilu Xia
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China
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Wietheger A, Starzak DE, Gould KS, Davy SK. Differential ROS Generation in Response to Stress in Symbiodinium spp. THE BIOLOGICAL BULLETIN 2018; 234:11-21. [PMID: 29694799 DOI: 10.1086/696977] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Oxidative stress inside cells occurs when the production of reactive oxygen species (ROS) is no longer efficiently counterbalanced by the generation of antioxidants. In this study, we measured the intracellular production of ROS, including hydrogen peroxide (H2O2), superoxide (O2-), and singlet oxygen (1O2), in cultured dinoflagellates of the genus Symbiodinium under thermal and oxidative stress. ROS tagged with fluorescent probes were measured by flow cytometry. Dissimilar Symbiodinium internal transcribed spacer 2 (ITS2) clades or phylotypes (A1, B2, E, F1) produced ROS in different quantities in response to stress. For example, when comparing the control (26 °C) to the high-temperature treatment (35 °C), Symbiodinium E showed no change in the intracellular concentrations of any of the ROS; but phylotype A1 displayed a 10-fold increase in the overall ROS concentration and a 4-fold increase in O2-. Under oxidative stress, when 8 mmol l-1 H2O2 was added to the cells, these same two Symbiodinium phylotypes increased their overall concentrations of ROS, but only Symbiodinium E showed an increase in the concentrations of O2- (2×) and 1O2 (3×). Therefore, not only were the stress responses of the various Symbiodinium phylotypes different but also the responses of individual phylotypes to thermal and oxidative stress were different in terms of ROS production. Variation in the quality and quantity of ROS generation and its implications for subsequent antioxidant production suggest that different stress mechanisms are at play. While our experiments were done under laboratory conditions that did not necessarily mirror ecological ones, these results provide new insight into processes inside Symbiodinium cells during stress events and add new explanations for a phylotype's susceptibility to stress.
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Key Words
- 1O2, singlet oxygen
- APX, ascorbate peroxidase
- CAT, catalase
- DMSO, dimethyl sulfoxide
- H2DCF-DA, 2′,7′-dichlorodihydrofluorescein diacetate
- ITS2, internal transcribed spacer 2
- NPQ, non-photochemical quenching
- O2−, superoxide
- OEC, oxygen-evolving complex
- OH•, hydroxyl radical
- PSI/II, photosystem I/II
- ROS, reactive oxygen species
- SOD, superoxide dismutase
- SOG, singlet oxygen sensor green
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Zheng H, Sun C, Hou X, Wu M, Yao Y, Li F. Pyrolysis of Arundo donax L. to produce pyrolytic vinegar and its effect on the growth of dinoflagellate Karenia brevis. BIORESOURCE TECHNOLOGY 2018; 247:273-281. [PMID: 28950136 DOI: 10.1016/j.biortech.2017.09.049] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 05/11/2023]
Abstract
Harmful algal blooms (HABs) have become global environmental issues, and the demand for alternative algaecides is urgent. Pyrolytic vinegars (PVs) were pyrolyzed from giant reed at 300-600°C to investigate the underlying mechanisms of their inhibitory effect on the red tide dinoflagellate Karenia brevis by sub-chronic toxicity experiments. The major components of PVs were acetic acid, phenols, aldehyde, ketone, and esters. The 96h median effective concentration (96h-EC50) values of PVs were 0.65-1.08mLL-1, and PV300 showed the strongest inhibitory effect. The increased contents of reactive oxygen species (ROS) and malondialdehyde, antioxidant enzymes activities indicated that K. brevis cells were suffering from oxidative stress, leading to lipid oxidation and cell structure damage. The sites of ROS accumulation in the treated cells were chloroplasts and mitochondria. These results suggest the suitability of PVs as potential algaecides for HAB control, and also provide a new direction for biomass valorization.
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Affiliation(s)
- Hao Zheng
- Institute of Coastal Environmental Pollution Control, Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Cuizhu Sun
- Institute of Coastal Environmental Pollution Control, Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Xiaodong Hou
- Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Miao Wu
- Institute of Coastal Environmental Pollution Control, Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yuan Yao
- Institute of Coastal Environmental Pollution Control, Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Fengmin Li
- Institute of Coastal Environmental Pollution Control, Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
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Liu H, Wu J, Zhang X, Xia Y, Li Y, Du S. Enantioselective oxidative stress caused by chiral ionic liquids forms of 1-alkyl-3-methyl imidazolium tartrate on Scenedesmus obliquus. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 595:819-827. [PMID: 28411565 DOI: 10.1016/j.scitotenv.2017.03.225] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/22/2017] [Accepted: 03/24/2017] [Indexed: 05/19/2023]
Abstract
Ionic liquids (ILs) are widely used, but their potential threat to the environment has recently gained more attention. The enantioselective oxidative stress caused by chiral ionic liquids (CILs), such as 1-alkyl-3-methyl imidazolium tartrate (RMIM T), on Scenedesmus obliquus was demonstrated in this study. Stronger green fluorescence was observed in response to l-(+)-RMIM T treatment than to d-(+)-RMIM T treatment, which suggested that more reactive oxygen species (ROS) were stimulated by l-(+)-RMIM T. Significantly higher ROS levels were recorded during the RMIM T treatments than in the control. There were 1.13-, 1.25-, 1.43-, 1.68-, and 1.96-fold increases over levels in the control in the 3, 5, 10, 15, and 25mg/L d-(-)-HMIM T treatments, respectively, and 1.26-, 1.37-, 1.58-, 1.86- and 2.08-fold increases over levels in the control in the 3, 5, 10, 15, and 25mg/L l-(+)-HMIM T treatments, respectively. The total soluble protein content decreased as the RMIM T concentration increased. The SOD and CAT activities were stimulated at lower concentrations, but were inhibited at higher concentrations. Regression analysis implied that ROS is the major factor responsible for the oxidative damage caused by RMIM T. The ultrastructural morphology analysis showed that plasmolysis and damage to the chloroplasts, starch granule decreases, and lipid granule increased, and pyrenoid and nucleoid damage had occurred. These results showed that enantioselective oxidative stress and oxidative damage were caused by d-(+)-RMIM T and l-(+)-RMIM T, and that l-(+)-RMIM T caused more damage than d-(+)-RMIM T.
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Affiliation(s)
- Huijun Liu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China.
| | - Jian Wu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China
| | - Xiaoqiang Zhang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China
| | - Yilu Xia
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China
| | - Yue Li
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China
| | - Shaoting Du
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China.
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45
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A chemical approach to manipulate the algal growth, lipid content and high-value alpha-linolenic acid for biodiesel production. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.08.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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46
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Yang K, Chen Q, Zhang D, Zhang H, Lei X, Chen Z, Li Y, Hong Y, Ma X, Zheng W, Tian Y, Zheng T, Xu H. The algicidal mechanism of prodigiosin from Hahella sp. KA22 against Microcystis aeruginosa. Sci Rep 2017; 7:7750. [PMID: 28798298 PMCID: PMC5552873 DOI: 10.1038/s41598-017-08132-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 07/05/2017] [Indexed: 12/31/2022] Open
Abstract
In recent years, Microcystis aeruginosa blooms have occurred throughout the world, causing huge economic losses and destroying aquatic ecosystems. It is necessary to develop effective and ecofriendly methods to control M. aeruginosa blooms. Here, we report a high algicidal activity of prodigiosin (PG) against M. aeruginosa as well as the algicidal mechanism. PG showed high algicidal activity against M. aeruginosa, with a 50% lethal dose (LD50) of 5.87 μg/mL in 72 h. A combination of methods, including propidium iodide and Annexin V-fluorescein staining assays and light and electron microscopy indicated the existence of two modes of cell death with features similar to those in eukaryotic programmed cell death: necrotic-like and apoptotic-like. Biochemical and physiological analyses showed that PG generates reactive oxygen species (ROS), which induce lipid peroxidation, damage the membrane system and destroy the function of the photosystem. A proteomics analysis revealed that many proteins were differentially expressed in response to PG stress and that most of these proteins were involved in important metabolic processes, which may trigger necrotic-like or apoptotic-like cell death. The present study sheds light on the multiple toxicity mechanisms of PG on M. aeruginosa and its potential for controlling the occurrence of M. aeruginosa blooms in lakes.
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Affiliation(s)
- Ke Yang
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Qiuliang Chen
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Danyang Zhang
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Huajun Zhang
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Xueqian Lei
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Zhangran Chen
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Yi Li
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Yaling Hong
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Xiaohong Ma
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Wei Zheng
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Yun Tian
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Tianling Zheng
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China. .,Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian, 361102, P. R. China.
| | - Hong Xu
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, P. R. China. .,Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian, 361102, P. R. China.
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47
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Cheng L, He Y, Tian Y, Liu B, Zhang Y, Zhou Q, Wu Z. Comparative biotoxicity of N-Phenyl-1-naphthylamine and N-Phenyl-2-naphthylamine on cyanobacteria Microcystis aeruginosa. CHEMOSPHERE 2017; 176:183-191. [PMID: 28260658 DOI: 10.1016/j.chemosphere.2017.02.110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 02/04/2017] [Accepted: 02/21/2017] [Indexed: 06/06/2023]
Abstract
N-Phenyl-1-naphthylamine (P1NA) and N-Phenyl-2-naphthylamine (P2NA) are both widely used as antioxidant and plant secondary metabolites. In this study, growth, esterase, photosynthetic activity and cell membrane integrity were used as biomarkers to compare biotoxicity of P1NA and P2NA on Microcystis aeruginosa. According to the results, a dose-response relationship was observed only between P1NA concentrations and growth inhibition. The EC50 (48 h) of P1NA calculated from growth inhibition was 16.62 μM, while that of P2NA was not detected. When the esterase and photosynthetic activity were applied to evaluate the biotoxicity, it was found that a concentration of 20 μM P1NA, P2NA caused reduction of esterase activity and Fv/Fm of M. aeruginosa to 22.2 and 3.3%, 97.5 and 92.1%, respectively, after 48 h exposure. The percentage of membrane-damaged cells was increased as P1NA exposure concentration increased, but that was not detected when exposure to P2NA. The difference substituted position in the molecular structure of P1NA and P2NA leads to different toxicological properties and only P1NA was found highly toxic to M. aeruginosa. The toxicity is due to that only P1NA can be biotransformed to 1,4-naphthoquinone, which could induce overproduction of intracellular ROS as well as result in oxidative damage and growth inhibition of test organism.
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Affiliation(s)
- Long Cheng
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yun Tian
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Biyun Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Yongyuan Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Qiaohong Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
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48
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Liu H, Xia Y, Cai W, Zhang Y, Zhang X, Du S. Enantioselective oxidative stress and oxidative damage caused by Rac- and S-metolachlor to Scenedesmus obliquus. CHEMOSPHERE 2017; 173:22-30. [PMID: 28104477 DOI: 10.1016/j.chemosphere.2017.01.028] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 12/07/2016] [Accepted: 01/04/2017] [Indexed: 06/06/2023]
Abstract
The rational use and environmental security of chiral pesticides has gained the interest of many researchers. The enantioselective effects of Rac- and S-metolachlor on oxidative stress in Scenedesmus obliquus were determined in this study. Stronger green fluorescence was observed in response to S-metolachlor treatment than to Rac-metolachlor treatment, suggesting that more reactive oxygen species (ROS) were stimulated by S-metolachlor. ROS levels following S-metolachlor treatment were 1.92-, 8.31-, and 1.08-times higher than those observed following Rac-metolachlor treatment at 0.1, 0.2, and 0.3 mg/L, respectively. Superoxide dismutase (SOD) and catalase (CAT) were stimulated with increasing herbicide concentrations, with S-metolachlor exhibiting a greater effect. Oxidative damage in terms of chlorophyll (Chl) content, cellular membrane permeability, and cellular ultrastructures of S. obliquus were investigated. Chla and Chlb contents in algae treated with Rac-metolachlor were 2-6-fold higher than those in algae treated with S-metolachlor at 0.1, 0.2, and 0.3 mg/L. The cellular membrane permeability of algae exposed to 0.3 mg/L Rac- and S-metolachlor was 6.19- and 42.5-times that of the control. Correlation analysis implied that ROS are the major factor responsible for the oxidative damage caused by Rac- and S-metolachlor. Damage to the chloroplasts and cell membrane of S. obliquus, low production of starch granules, and an increased number of vacuoles were observed upon ultrastructural morphology analysis by transmission electron microscope. These results indicate that S-metolachlor has a greater effect on S. obliquus than Rac-metolachlor.
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Affiliation(s)
- Huijun Liu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
| | - YiLu Xia
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Weidan Cai
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China; Environmental Science Research & Design Institute of Taizhou City, China
| | - Yina Zhang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Xiaoqiang Zhang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Shaoting Du
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
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49
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Kim Y, Kim Y, Choi J, Kang T, Choi I. Determination of nanomolar levels of reactive oxygen species in microorganisms and aquatic environments using a single nanoparticle-based optical sensor. Anal Chim Acta 2017; 967:85-92. [PMID: 28390490 DOI: 10.1016/j.aca.2017.03.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 03/08/2017] [Accepted: 03/09/2017] [Indexed: 12/25/2022]
Abstract
Reactive oxygen species (ROS) are strong oxidants, and have attracted considerable attention in both biological and environmental fields. Although various methods for ROS detection, including optical and electrochemical techniques, have been developed, they still face challenging issues in terms of poor sensitivity, reproducibility, stability, and in vivo applicability. Here, we present a sensitive and selective optical sensor for ROS detection, based on single plasmonic nanoprobes and redox-active cytochrome c (Cyt c)-mediated plasmon resonance energy transfer. By measuring the spectral changes of plasmonic nanoprobes, derived from the unique molecular absorption of Cyt c in accordance with the redox state, calibration curves for H2O2, a representative ROS, in various media were obtained over a wide concentration range from 100 mM to 1 nM. Limit of detection and limit of quantification in accordance with the used medium were determined from 8.3 to 12.8 nM and from 27.6 to 42.7 nM, respectively. Selectivity coefficients for major interfering solutes were much lower than 0.1 indicating a good selectivity for ROS. From the dynamic spectral changes, we sensitively monitored ROS generated in Caenorhabditis elegans (C. elegans) exposed to graphene oxide. Based on the calibration curves, we also determined ROS levels in various aquatic environments, such as river streams and a small pond, as a way of environmental monitoring. We believe that our approach could provide an avenue for achieving dynamic and sensitive monitoring of ROS in toxicological, biological, and environmental fields in the future.
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Affiliation(s)
- Yura Kim
- Department of Life Science, University of Seoul, Seoul 130-743, Republic of Korea
| | - Youngho Kim
- School of Environmental Engineering, Graduate School of Energy and Environmental System Engineering, University of Seoul, Seoul 130-743, Republic of Korea
| | - Jinhee Choi
- School of Environmental Engineering, Graduate School of Energy and Environmental System Engineering, University of Seoul, Seoul 130-743, Republic of Korea
| | - Taewook Kang
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea.
| | - Inhee Choi
- Department of Life Science, University of Seoul, Seoul 130-743, Republic of Korea.
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50
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Lu Z, Sha J, Tian Y, Zhang X, Liu B, Wu Z. Polyphenolic allelochemical pyrogallic acid induces caspase-3(like)-dependent programmed cell death in the cyanobacterium Microcystis aeruginosa. ALGAL RES 2017. [DOI: 10.1016/j.algal.2016.11.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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