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Yang L, Li Y, Li X, Lu H, Wang Y, Meng H, Ren Y, Lan J. Effect of interactions between humic acid and cerium oxide nanoparticles on the toxicity to the Chlorella sp. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:38274-38287. [PMID: 38802614 DOI: 10.1007/s11356-024-33762-4] [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: 12/12/2023] [Accepted: 05/17/2024] [Indexed: 05/29/2024]
Abstract
With the wide application of nanomaterials, the concentration of nanomaterials in natural water continues to increase, which poses a severe threat to the water environment. However, the influence of organic matter and nanomaterials rich in natural water on the toxic effect of algae growth is still unclear. In this study, the effects of humic acid (HA) and nano-cerium oxide (nCeO2) on the physiology and transcriptome of Chlorella sp. were analyzed, and the mechanism of the toxic effect of HA on Chlorella sp. under nCeO2 stress was revealed. Under 20-200 mg/L nCeO2 stress, the growth of Chlorella cells was inhibited and the highest inhibition rate reached 52% within 200 mg/L nCeO2. The Fv/Fm and ETRmax values of Chlorella sp. decreased from 0.490 and 24.45 (20 mg/L nCeO2) to 0.488 and 23.4 (100 mg/L nCeO2), respectively. Under the stimulation of nCeO2, the level of reactive oxygen species in algal cells was increased, accompanied by lipid peroxidation and membrane damage. However, the addition of HA at concentrations of 5-10 mg/L effectively alleviated the toxic effect of nCeO2 on Chlorella sp. Transcriptome analysis showed that 10 mg/L HA could alleviate the cellular stress at 100 mg/L nCeO2 on Chlorella sp. by regulating genes related to photosynthesis and metabolism pathways. Moreover, the downregulation of genes (e.g., Lhca1, Lhcb1, AOC3, and AOC2) indicated that HA reduced the level of oxidative stress in Chlorella sp. These findings offer novel insights of evaluating the ecotoxicity nCeO2 and HA in natural water environment and their impact on Chlorella sp.
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Affiliation(s)
- Lei Yang
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yucai Li
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Xiaotong Li
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Haoqi Lu
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yuchao Wang
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Hongyan Meng
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yongxiang Ren
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Jun Lan
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
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Wang SQ, Zhou XL, Jin YS, Jeppesen E, Yang L, Shen SK. Gene co-expression networks unravel the molecular responses of freshwater hydrophytes to combined stress of salinity and cadmium. CHEMOSPHERE 2023; 340:139933. [PMID: 37625492 DOI: 10.1016/j.chemosphere.2023.139933] [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: 05/15/2023] [Revised: 08/13/2023] [Accepted: 08/21/2023] [Indexed: 08/27/2023]
Abstract
Salinization in freshwater lakes is becoming a serious global environmental problem, especially in lakes of plateaus such as south-western plateau of China. However, limited information is available about the molecular response of freshwater hydrophytes to salinity under multiple stress. In the present study, a weighted gene co-expression network (WGCNA) was used to identify the modules of co-expressed genes in the physiological and biochemical indicators of Pistia stratiotes to determine its molecular response to salinity (NaCl) alone and when combined with cadmium (Cd). The physiological and biochemical indicators showed that P. stratiotes improved its salt tolerance by enhancing photosynthetic abilities, reducing oxidative stress, and inducing osmoprotectant generation. Morever, addition of NaCl reduced the Cd accumulation in P. stratiotes. Transcriptome and WGCNA analysis revealed that the pathways of alpha-linolenic acid metabolism, ribosomal, flavonoid biosynthesis, and phenylpropanoid biosynthesis were significantly enriched in both treatments. Genes associated with photosynthesis-antenna proteins, nitrogen metabolism, and the acid cycle pathways were only expressed under salinity stress alone, while the proteasome pathway was only significantly enriched in the combined salinity and Cd treatment. Our findings provide novel insights into the effects of salinization on aquatic plants in freshwater ecosystems and the management of aquatic ecosystems under global change.
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Affiliation(s)
- Si-Qi Wang
- Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology, Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, Yunnan, China
| | - Xiong-Li Zhou
- Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology, Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, Yunnan, China
| | - Yan-Shan Jin
- Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology, Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, Yunnan, China
| | - Erik Jeppesen
- Department of Ecoscience, Aarhus University, Aarhus C, 8000, Denmark; Sino-Danish Centre for Education and Research, Beijing, 100049, China; 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, Mersin, 33731, Turkey; Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650500, China
| | - Liu Yang
- Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology, Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, Yunnan, China
| | - Shi-Kang Shen
- Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology, Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, Yunnan, China.
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Zheng JL, Zhu QL, Hogstrand C. Zinc pre-exposure improves Zn resistance by demethylation of metallothionein 2 and transcription regulation of zinc-regulatory genes in zebrafish ZF4 cells. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 261:106605. [PMID: 37352751 DOI: 10.1016/j.aquatox.2023.106605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/15/2023] [Accepted: 06/07/2023] [Indexed: 06/25/2023]
Abstract
Mild zinc (Zn) pre-exposure can promote Zn resistance of organism, but the underlying molecular mechanisms are largely unknown. Two experiments were performed using zebrafish ZF4 cells, including short-term and long-term Zn pre-exposure experiments. In the short-term test, the cells were pre-exposed to 100 µM Zn for 24 h, transferred into fresh medium with 4.4 µM Zn for 24 h, and then re-exposed to 250 µM Zn. In the long-term test, the cells were pre-exposed to 100 µM Zn intermittently for 10 passages (3 days per passage), transferred into fresh medium with 4.4 µM Zn for 5 passages, and then re-exposed to 250 µM Zn. Both pretreatments resulted in higher resistance to 250 µM Zn. Exposure to 250 µM Zn caused a more than 2-fold increase in Zn content without Zn pretreatment but did not affect Zn content in the Zn pretreated cells. The Zn pretreated cells had low methylation levels of the metal-response element (MRE) at locus -87 in the promoter of mt2 (metallothionein 2). The up-regulated mRNA expression of Zn-regulatory genes (mtf-1, mt2, slc30a1a, slc30a4, slc30a5, slc30a6 and slc30a7) in the long-term Zn pretreated cells and mt2, slc30a4, slc30a6 and slc30a7 in the short-term Zn pretreated cells were observed. Exposure to 250 µM Zn in combination with the Zn pretreatments up-regulated mRNA expression of these genes and reduced methylation levels of the MRE compared with 250 µM Zn alone and the control. Taken together, the data suggested that demethylation of MRE in the promoter of mt2 and transcriptional induction of mt2 and Zn exporter genes offered Zn resistance in fish ZF4 cells. The traditional toxicological evaluation based on continuous exposure may overestimate the risk of fluctuating concentrations of Zn in the environment.
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Affiliation(s)
- Jia-Lang Zheng
- King's College London, Faculty of Life Sciences and Medicine, Department of Nutritional Sciences, Metal Metabolism Group, London, UK; National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, PR China.
| | - Qing-Ling Zhu
- King's College London, Faculty of Life Sciences and Medicine, Department of Nutritional Sciences, Metal Metabolism Group, London, UK; National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Christer Hogstrand
- King's College London, Faculty of Life Sciences and Medicine, Department of Nutritional Sciences, Metal Metabolism Group, London, UK.
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Nagarajan D, Lee DJ, Varjani S, Lam SS, Allakhverdiev SI, Chang JS. Microalgae-based wastewater treatment - Microalgae-bacteria consortia, multi-omics approaches and algal stress response. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 845:157110. [PMID: 35787906 DOI: 10.1016/j.scitotenv.2022.157110] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 06/27/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
Sustainable environmental management is one of the important aspects of sustainable development goals. Increasing amounts of wastewaters (WW) from exponential economic growth is a major challenge, and conventional treatment methods entail a huge carbon footprint in terms of energy use and GHG emissions. Microalgae-based WW treatment is a potential candidate for sustainable WW treatment. The nutrients which are otherwise unutilized in the conventional processes are recovered in the beneficial microalgal biomass. This review presents comprehensive information regarding the potential of microalgae as sustainable bioremediation agents. Microalgae-bacterial consortia play a critical role in synergistic nutrient removal, supported by the complex nutritional and metabolite exchange between microalgae and the associated bacteria. Design of effective microalgae-bacteria consortia either by screening or by recent technologies such as synthetic biology approaches are highly required for efficient WW treatment. Furthermore, this review discusses the crucial research gap in microalgal WW treatment - the application of a multi-omics platform for understanding microalgal response towards WW conditions and the design of effective microalgal or microalgae-bacteria consortia based on genetic information. While metagenomics helps in the identification and monitoring of the microbial community throughout the treatment process, transcriptomics, proteomics and metabolomics aid in studying the algal cellular response towards the nutrients and pollutants in WW. It has been established that the integration of microalgal processes into conventional WW treatment systems is feasible. In this direction, future research directions for microalgal WW treatment emphasize the need for identifying the niche in WW treatment, while highlighting the pilot sale plants in existence. Microalgae-based WW treatment could be a potential phase in the waste hierarchy of circular economy and sustainability, considering WWs are a rich secondary source of finite resources such as nitrogen and phosphorus.
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Affiliation(s)
- Dillirani Nagarajan
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan; Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan.
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan; Department of Mechanical Engineering, City University of Hong Kong, Kowloon Tang, Hong Kong
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, Gujarat 382 010, India
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Sustainability Cluster, School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand 248007, India
| | - Suleyman I Allakhverdiev
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan; Department of Chemical and Materials Engineering, Tunghai University, Taichung, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung, Taiwan; Department of Chemical Engineering and Materials Science, Yuan Ze University, Chung-Li, Taiwan.
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Optimisation of Operational Conditions during the Production of Arthrospira platensis Using Pilot-Scale Raceway Reactors, Protein Extraction, and Assessment of their Techno-Functional Properties. Foods 2022; 11:foods11152341. [PMID: 35954107 PMCID: PMC9368457 DOI: 10.3390/foods11152341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/01/2022] [Accepted: 08/03/2022] [Indexed: 11/17/2022] Open
Abstract
The aim of the present study was to identify the optimum combination of dilution rate and depth of the culture to maximise the Arthrospira platensis BEA005B (Spirulina) productivity using 80 m2 raceway reactors. By varying these two main operational conditions, the areal biomass productivity of the reactors varied by over 55%. The optimum combination, optimised using a surface response methodology, was a depth of 0.10 m and a dilution rate of 0.33 day-1, which led to a biomass productivity of 30.2 g·m-2·day-1 on a dry weight basis when operating the reactors in semi-continuous mode. The composition of the produced biomass was 62.2% proteins, 42.5% carbohydrates, 11.6% ashes, and 8.1% lipids. The isolated proteins contained all the essential amino acids (except for tryptophan, which was not determined); highlighting the content of valine (6.8%), histidine (8.3%), and lysine (7.5%). The functional properties of the proteins were also assessed, demonstrating huge potential for their use in the development of innovative and sustainable foods.
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An M, Hong D, Chang D, Zhang C, Fan H, Wang K. Polymer amendment regulates cadmium migration in cadmium contaminated cotton field: Insights from genetic adaptation and phenotypic plasticity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:151075. [PMID: 34687702 DOI: 10.1016/j.scitotenv.2021.151075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 10/11/2021] [Accepted: 10/15/2021] [Indexed: 06/13/2023]
Abstract
Polymer materials have been widely used in the remediation of soil heavy metal contamination for their good performance in the absorption of metal ions. To reveal the effect of polymer amendment (PA) on the remediation of cadmium-contaminated cotton fields, the cadmium (Cd) fractions in soil, Cd concentration in cotton organs, bioconcentration factor (BCF) of Cd, translocation factor (TF) of Cd, and the antioxidant capacity and photosynthesis of functional leaves were evaluated combining with the transcriptomic and metabolomic analyses, in barrel experiments in the field at the flowering and boll-forming stage of cotton. The results showed that, cotton improved the tolerance to Cd through self-regulation in Cd-contaminated soil. The expression of oxoglutaric acid and jasmonic acid were down-regulated by the application of PA to improve the photosynthetic rate (7.71%-46.20%), chlorophyll content (17.59%-63.18%), chlorophyll fluorescence (7.66%-32.25%), and antioxidant enzyme activity (15.49%-45.50%) of functional leaves, and the down-regulation of the expression of jasmonic acid and up-regulation of the expression of stearic acid reduced the exchangeable Cd concentration in the soil, which reduced the transport of Cd from the root to the bolls (54.39%). Thereby, the balance of the genetic adaptation and phenotypic plasticity of cotton was achieved, and the cell structure of leaves was restored. This study deepens our understanding of the molecular mechanism of PA in the remediation of Cd contamination in cotton fields, and provides guidance for the remediation of heavy metal contamination in farmland soil and agricultural safety under drip irrigation.
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Affiliation(s)
- Mengjie An
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Dashuang Hong
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Doudou Chang
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Chunyuan Zhang
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Hua Fan
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China.
| | - Kaiyong Wang
- Agricultural College, Shihezi University, Shihezi, Xinjiang 832000, PR China.
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Hu W, Zhu QL, Zheng JL, Wen ZY. Cadmium induced oxidative stress, endoplasmic reticulum (ER) stress and apoptosis with compensative responses towards the up-regulation of ribosome, protein processing in the ER, and protein export pathways in the liver of zebrafish. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2022; 242:106023. [PMID: 34798301 DOI: 10.1016/j.aquatox.2021.106023] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 10/09/2021] [Accepted: 11/10/2021] [Indexed: 06/13/2023]
Abstract
The present study identified that exposure to 5, 10, and 20 µg/L Cd for 48 days reduced growth, increased Cd accumulation and levels of reactive oxygen species (ROS) and lipid peroxidation, and induced ER stress and cellular apoptosis in the liver in a dose-dependent manner. However, the survival rate was not affected by Cd. The increased production of ROS might result from reduced catalase (CAT) and copper/zinc-superoxide dismutase (Cu/Zn-SOD) activities, which might trigger ER stress pathways and subsequently induce apoptotic responses, ultimately leading to growth inhibition. Transcriptomic analyses indicated that the differentially expressed genes (DEGs) involved in metabolic pathways were significantly enriched and dysregulated by Cd, suggesting that metabolic disturbances may contribute to Cd toxicity. However, there were increases in glutathione peroxidase (GPX) activity, protein levels of metallothioneins (MTs) and heat shock protein 70 (HSP70), and mRNA levels of sod1, cat, gpx, mt2, and hsp70. Furthermore, DEGs related to ribosome, protein processing in the ER, and protein export pathways were significantly enriched and up-regulated by Cd. These increases may be compensatory responses following oxidative stress, ER stress, and apoptosis to resist negative effects. Taken together, we demonstrated that environmentally relevant levels of Cd induced adaptive responses with compensatory mechanisms in fish, which may help to maintain fish survival at the cost of growth.
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Affiliation(s)
- Wei Hu
- School of Animal Science, Yangtze University, Jingzhou, 424020, PR China
| | - Qing-Ling Zhu
- National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, PR China.
| | - Jia-Lang Zheng
- National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, PR China.
| | - Zheng-Yong Wen
- Key Laboratory of Sichuan Province for Fishes Conservation and Utilization in the Upper Reaches of the Yangtze River, Neijiang Normal University, China
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Ectomycorrhizal Fungal Strains Facilitate Cd 2+ Enrichment in a Woody Hyperaccumulator under Co-Existing Stress of Cadmium and Salt. Int J Mol Sci 2021; 22:ijms222111651. [PMID: 34769083 PMCID: PMC8583747 DOI: 10.3390/ijms222111651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 10/23/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
Cadmium (Cd2+) pollution occurring in salt-affected soils has become an increasing environmental concern in the world. Fast-growing poplars have been widely utilized for phytoremediation of soil contaminating heavy metals (HMs). However, the woody Cd2+-hyperaccumulator, Populus × canescens, is relatively salt-sensitive and therefore cannot be directly used to remediate HMs from salt-affected soils. The aim of the present study was to testify whether colonization of P. × canescens with ectomycorrhizal (EM) fungi, a strategy known to enhance salt tolerance, provides an opportunity for affordable remediation of Cd2+-polluted saline soils. Ectomycorrhization with Paxillus involutus strains facilitated Cd2+ enrichment in P. × canescens upon CdCl2 exposures (50 μM, 30 min to 24 h). The fungus-stimulated Cd2+ in roots was significantly restricted by inhibitors of plasmalemma H+-ATPases and Ca2+-permeable channels (CaPCs), but stimulated by an activator of plasmalemma H+-ATPases. NaCl (100 mM) lowered the transient and steady-state Cd2+ influx in roots and fungal mycelia. Noteworthy, P. involutus colonization partly reverted the salt suppression of Cd2+ uptake in poplar roots. EM fungus colonization upregulated transcription of plasmalemma H+-ATPases (PcHA4, 8, 11) and annexins (PcANN1, 2, 4), which might mediate Cd2+ conductance through CaPCs. EM roots retained relatively highly expressed PcHAs and PcANNs, thus facilitating Cd2+ enrichment under co-occurring stress of cadmium and salinity. We conclude that ectomycorrhization of woody hyperaccumulator species such as poplar could improve phytoremediation of Cd2+ in salt-affected areas.
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Zhu Q, Zhang M, Bao J, Liu J. Physiological, metabolomic, and transcriptomic analyses reveal the dynamic redox homeostasis upon extended exposure of Dunaliella salina GY-H13 cells to Cd. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 223:112593. [PMID: 34358929 DOI: 10.1016/j.ecoenv.2021.112593] [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: 06/01/2021] [Revised: 07/27/2021] [Accepted: 07/31/2021] [Indexed: 06/13/2023]
Abstract
The study was done to elucidate the molecular mechanisms underlying the steady maintenance of the green microalga Dunaliella salina GY-H13 in successive subcultures in F/2 medium supplemented with the high cadmium (Cd) concentration (5 mg L-1) for 3 months or 84 days using physiological, metabolomic, and transcriptomic methodologies. Physiological analysis indicated that Cd suppressed growth rate, photosynthetic efficiency, and pigment contents and promoted Cd accumulation, reactive oxygen species (ROS) generation and lipid peroxidation. UPLC-MS/MS-based metabolic analysis identified the top most upregulated and downregulated metabolites, the 5'-dehydroxyadenosine and thiamine acetic acid that were associated with the formation and removal of H2O2. RNA-seq-based transcriptomic analysis showed the overrepresentation of low-CO2-inducible genes in the most downregulated gene set. Metabolomic and transcriptomic analyses further showed that the decreased GSSG/GSH-based redox potential, increased oxidative-phosphorylation gene expression, and reduced activity of TCA cycle in cells after extended exposure to Cd. Taken together, our results imply that cellular defense to Cd in D. salina is achieved by upregulation of ROS-scavenging activities including depletion of thiamine acetic acid. Dynamic redox homeostasis is maintained in cells with extended exposure to Cd by production of both oxidants and antioxidants through multiple pathways.
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Affiliation(s)
- Qingling Zhu
- Systems Biology, School of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Mengmeng Zhang
- Systems Biology, School of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Jingjing Bao
- Zhejiang Marine Development Research Institute, Zhoushan, Zhejiang 316000, China
| | - Jianhua Liu
- Systems Biology, School of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China; National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China.
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10
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Zhang B, Wu J, Meng F. Adaptive Laboratory Evolution of Microalgae: A Review of the Regulation of Growth, Stress Resistance, Metabolic Processes, and Biodegradation of Pollutants. Front Microbiol 2021; 12:737248. [PMID: 34484172 PMCID: PMC8416440 DOI: 10.3389/fmicb.2021.737248] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 07/30/2021] [Indexed: 11/27/2022] Open
Abstract
Adaptive laboratory evolution (ALE) experiments are a serviceable method for the industrial utilization of the microalgae, which can improve the phenotype, performance, and stability of microalgae to obtain strains containing beneficial mutations. In this article, we reviewed the research into the microalgae ALE test and assessed the improvement of microalgae growth, tolerance, metabolism, and substrate utilization by ALE. In addition, the principles of ALE and the key factors of experimental design, as well as the issues and drawbacks of the microalgae ALE method were discussed. In general, improving the efficiency of ALE and verifying the stability of ALE resulting strains are the primary problems that need to be solved in future research, making it a promising method for the application of microalgae biotechnology.
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Affiliation(s)
- Bo Zhang
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, China
| | - Jiangyue Wu
- National Marine Hazard Mitigation Service, Ministry of Natural Resource of the People's Republic of China, Beijing, China
| | - Fanping Meng
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, China
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Lafarga T, Sánchez‐Zurano A, Morillas‐España A, Acién‐Fernández FG. Extremophile microalgae as feedstock for high‐value carotenoids: A review. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15069] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Tomás Lafarga
- Department of Chemical Engineering University of Almería Almería 04120 Spain
| | - Ana Sánchez‐Zurano
- Department of Chemical Engineering University of Almería Almería 04120 Spain
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Villagrasa E, Palet C, López-Gómez I, Gutiérrez D, Esteve I, Sánchez-Chardi A, Solé A. Cellular strategies against metal exposure and metal localization patterns linked to phosphorus pathways in Ochrobactrum anthropi DE2010. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123808. [PMID: 33254804 DOI: 10.1016/j.jhazmat.2020.123808] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/07/2020] [Accepted: 08/24/2020] [Indexed: 06/12/2023]
Abstract
Cytotoxic, chemical, biochemical, compositional, and morphometric responses were analyzed against heavy metal exposure in Ochrobactrum anthropi DE2010, an heterotrophic bacterium isolated from Ebro Delta microbial mats (Tarragona, NE Spain). Several parameters of effect and exposure were evaluated to determine tolerance to a range of cadmium (Cd), lead (Pb(II)), copper (Cu(II)), chromium (Cr(III)), and zinc (Zn) concentrations. Additionally, removal efficiency, polyphosphate production and metal localization patterns were also analyzed. O. anthropi DE2010 showed high resistance to the tested metals, supporting concentrations of up to 20 mM for Zn and 10 mM for the rest of the elements. The bacterium also demonstrated a high removal capacity of metals-up to 90 % and 40 % for Pb(II) and Cr(III), respectively. Moreover, polyphosphate production was strongly correlated with heavy metal concentration, and three clear cell localization patterns of metals were evidenced using compositional and imaging techniques: (i) extracellular in polyphosphate granules for Cu(II); (ii) in periplasmic space forming crystals with phosphorus for Pb(II); and (iii) intracytoplasmic in polyphosphate inclusions for Pb(II), Cr(III), and Zn. The high resistance and metal sequestration capacity of O. anthropi DE2010 both highlight its great potential for bioremediation strategies, especially in Pb and Cr polluted areas.
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Affiliation(s)
- Eduard Villagrasa
- Departament de Genètica i Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Cristina Palet
- GTS-UAB Research Group, Department of Chemistry, Facultat de Ciències. Universitat Autònoma de Barcelona, Bellaterra, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Irene López-Gómez
- Departament de Genètica i Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Diana Gutiérrez
- Departament de Genètica i Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Isabel Esteve
- Departament de Genètica i Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Alejandro Sánchez-Chardi
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona, 08028 Barcelona, Spain; Servei de Microscòpia, Universitat Autònoma de Barcelona, Bellaterra, Cerdanyola del Vallès, 08193 Barcelona, Spain.
| | - Antonio Solé
- Departament de Genètica i Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Cerdanyola del Vallès, 08193 Barcelona, Spain.
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