1
|
Cha Y, Kim W, Park Y, Kim M, Son Y, Park W. Antagonistic actions of Paucibacter aquatile B51 and its lasso peptide paucinodin toward cyanobacterial bloom-forming Microcystis aeruginosa PCC7806. JOURNAL OF PHYCOLOGY 2024; 60:152-169. [PMID: 38073162 DOI: 10.1111/jpy.13412] [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: 03/16/2023] [Revised: 10/04/2023] [Accepted: 11/08/2023] [Indexed: 02/17/2024]
Abstract
Superior antagonistic activity against axenic Microcystis aeruginosa PCC7806 was observed with Paucibacter sp. B51 isolated from cyanobacterial bloom samples among 43 tested freshwater bacterial species. Complete genome sequencing, analyzing average nucleotide identity and digital DNA-DNA hybridization, designated the B51 strain as Paucibacter aquatile. Electron and fluorescence microscopic image analyses revealed the presence of the B51 strain in the vicinity of M. aeruginosa cells, which might provoke direct inhibition of the photosynthetic activity of the PCC7806 cells, leading to perturbation of cellular metabolisms and consequent cell death. Our speculation was supported by the findings that growth failure of the PCC7806 cells led to low pH conditions with fewer chlorophylls and down-regulation of photosystem genes (e.g., psbD and psaB) during their 48-h co-culture condition. Interestingly, the concentrated ethyl acetate extracts obtained from B51-grown supernatant exhibited a growth-inhibitory effect on PCC7806. The physical separation of both strains by a filter system led to no inhibitory activity of the B51 cells, suggesting that contact-mediated anti-cyanobacterial compounds might also be responsible for hampering the growth of the PCC7806 cells. Bioinformatic tools identified 12 gene clusters that possibly produce secondary metabolites, including a class II lasso peptide in the B51 genome. Further chemical analysis demonstrated anti-cyanobacterial activity from fractionated samples having a rubrivinodin-like lasso peptide, named paucinodin. Taken together, both contact-mediated inhibition of photosynthesis and the lasso peptide secretion of the B51 strain are responsible for the anti-cyanobacterial activity of P. aquatile B51.
Collapse
Affiliation(s)
- Yeji Cha
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Wonjae Kim
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Yerim Park
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Minkyung Kim
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Yongjun Son
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Woojun Park
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| |
Collapse
|
2
|
Draft Genome Sequence of an Epibiotic Bacterium, Bacillus cereus, Isolated from Cyanobacterial Blooms in Lake Taihu, China. Microbiol Resour Announc 2023; 12:e0093622. [PMID: 36779729 PMCID: PMC10019315 DOI: 10.1128/mra.00936-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Abstract
Here, we report the draft genome sequence of Bacillus cereus strain THSB-6-2, which was isolated from cyanobacterial blooms in Lake Taihu, China. The 5,496,658-bp genome assembly of Bacillus cereus consists of 28 contigs, with a GC content of 35% and with 5,587 protein-coding sequences and 58 RNA genes.
Collapse
|
3
|
Mankiewicz-Boczek J, Morón-López J, Serwecińska L, Font-Nájera A, Gałęzowska G, Jurczak T, Kokociński M, Wolska L. Algicidal activity of Morganella morganii against axenic and environmental strains of Microcystis aeruginosa: Compound combination effects. CHEMOSPHERE 2022; 309:136609. [PMID: 36195129 DOI: 10.1016/j.chemosphere.2022.136609] [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: 03/29/2022] [Revised: 09/23/2022] [Accepted: 09/24/2022] [Indexed: 06/16/2023]
Abstract
Cyanobacterial harmful algal blooms (cyanoHABs) are a global problem with serious consequences for public health and many sectors of the economy. The use of algicidal bacteria as natural antagonists to control bloom-forming cyanobacteria is a topic of growing interest. However, there are still unresolved questions that need to be addressed to better understand their mode of action and to implement effective mitigation strategies. In this study, thirteen bacterial strains isolated from both scums and concentrated bloom samples exhibited algicidal activity on three Microcystis aeruginosa strains with different characteristics: the axenic microcystin (MC)-producing strain M. aeruginosa PCC7820 (MaPCC7820), and two environmental (non-axenic) M. aeruginosa strains isolated from two different water bodies in Poland, one MC-producer (MaSU) and another non-MC-producer (MaPN). The bacterial strain SU7S0818 exerted the highest average algicidal effect on the three cyanobacterial strains. This strain was identified as Morganella morganii (99.51% similarity) by the 16S rRNA gene analyses; hence, this is the first study that demonstrates the algicidal properties of these ubiquitous bacteria. Microscopic cell counting and qPCR analyses showed that M. morganii SU7S0818 removed 91%, 96%, and 98.5% of MaPCC7820, MaSU and MaPN cells after 6 days of co-culture, respectively. Interestingly, the ultra-high-performance liquid chromatography-tandem mass spectrometer (UHPLC-MS/MS) analyses showed that this bacterium was involved on the release of several substances with algicidal potential. It was remarkable how the profile of some compounds evolved over time, as in the case of cadaverine, tyramine, cyclo[Pro-Gly] and cyclo[Pro-Val]. These dynamic changes could be attributed to the action of M. morganii SU7S0818 and the presence of associated bacteria with environmental cyanobacterial strains. Therefore, this study sheds light on how algicidal bacteria may adapt their action on cyanobacterial cells by releasing a combination of compounds, which is a crucial insight to exploit them as effective biological tools in the control of cyanoHABs.
Collapse
Affiliation(s)
- J Mankiewicz-Boczek
- European Regional Centre for Ecohydrology of the Polish Academy of Sciences, 3 Tylna, 90-364, Łódź, Poland.
| | - J Morón-López
- European Regional Centre for Ecohydrology of the Polish Academy of Sciences, 3 Tylna, 90-364, Łódź, Poland.
| | - L Serwecińska
- European Regional Centre for Ecohydrology of the Polish Academy of Sciences, 3 Tylna, 90-364, Łódź, Poland.
| | - A Font-Nájera
- European Regional Centre for Ecohydrology of the Polish Academy of Sciences, 3 Tylna, 90-364, Łódź, Poland.
| | - G Gałęzowska
- Department of Environmental Toxicology, Faculty of Health Sciences, Medical University of Gdansk, Debowa Str. 23A, 80-204, Gdańsk, Poland.
| | - T Jurczak
- UNESCO Chair on Ecohydrology and Applied Ecology, University of Lodz, 12/16 Banacha, 90-237, Łódź, Poland.
| | - M Kokociński
- Department of Hydrobiology, Adam Mickiewicz University, 6 Uniwersytetu Poznańskiego, 61-614, Poznań, Poland.
| | - L Wolska
- Department of Environmental Toxicology, Faculty of Health Sciences, Medical University of Gdansk, Debowa Str. 23A, 80-204, Gdańsk, Poland.
| |
Collapse
|
4
|
Isolation, identification of algicidal bacteria and contrastive study on algicidal properties against Microcystis aeruginosa. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
Benegas GRS, Bernal SPF, de Oliveira VM, Passarini MRZ. Antimicrobial activity against Microcystis aeruginosa and degradation of microcystin-LR by bacteria isolated from Antarctica. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:52381-52391. [PMID: 34009576 DOI: 10.1007/s11356-021-14458-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
Cyanobacteria massive proliferations are common in freshwater bodies worldwide, causing adverse effects on aquatic ecosystems and public health. Numerous species develop blooms. Most of them correspond to the toxic microcystin-producing cyanobacterium Microcystis aeruginosa. Microorganisms recovered from Antarctic environment can be considered an unexploited source of antimicrobial compounds. Data about their activity against cyanobacteria are scant or inexistent. This study aimed to evaluate the capacity of Antarctic bacteria to inhibit the proliferation of M. aeruginosa BCPUSP232 and to degrade microcystin-LR (MC-LR). Cell-free extracts of seventy-six bacterial strains were initially tested for antimicrobial activity. Unidentified (UN) strains 62 and ES7 and Psychromonas arctica were able to effectively lyse M. aeruginosa. Eight strains showed MIC ranging from 0.55 to 3.00 mg mL-1, with ES7 showing the best antimicrobial activity. Arthrobacter sp. 443 and UN 383 were the most efficient in degrading MC-LR, with 24.87 and 23.85% degradation, respectively. To our knowledge, this is the first report of antimicrobial and MC-LR degradation activities by Antarctic bacteria, opening up perspectives for their future application as an alternative or supporting approach to help mitigate cyanobacterial blooms.
Collapse
Affiliation(s)
- Gabriela Rocío Sosa Benegas
- Laboratório de Biotecnologia Ambiental, UNILA - Universidade Federal da Integração Latino-Americana, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil
- ITAIPU BINACIONAL - Estación de acuicultura - Laboratorios ecológicos de la División de Embalse MARR.CE, Supercarretera Itaipu, Km 16.5, Hernandarias, Paraguay
| | - Suzan Prado Fernandes Bernal
- Laboratório de Biotecnologia Ambiental, UNILA - Universidade Federal da Integração Latino-Americana, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil
| | - Valéria Maia de Oliveira
- CPQBA/UNICAMP - Divisão de Recursos Microbianos, Rua Alexandre Caselatto 999, Vila Betel, CP 6171, Campinas, SP, 13083-970, Brazil
| | - Michel Rodrigo Zambrano Passarini
- Laboratório de Biotecnologia Ambiental, UNILA - Universidade Federal da Integração Latino-Americana, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil.
| |
Collapse
|
6
|
Complete Genome Sequence Analysis of Brevibacillus laterosporus Bl-zj Reflects its Potential Algicidal Response. Curr Microbiol 2021; 78:1409-1417. [DOI: 10.1007/s00284-021-02378-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 02/05/2021] [Indexed: 12/14/2022]
|
7
|
Crettaz-Minaglia M, Fallico M, Aranda O, Juarez I, Pezzoni M, Costa C, Andrinolo D, Giannuzzi L. Effect of temperature on microcystin-LR removal and lysis activity on Microcystis aeruginosa (cyanobacteria) by an indigenous bacterium belonging to the genus Achromobacter. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:44427-44439. [PMID: 32767213 DOI: 10.1007/s11356-020-09901-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 06/26/2020] [Indexed: 06/11/2023]
Abstract
Microcystis is a frequent cyanobacterium bloom-forming with cosmopolitan distribution which can produce a hepatotoxin group called microcystins (MCs). These MCs are resistant to the traditional processes employed in the water treatment plants and they are often detected after conventional treatments. Because of this, the bio-removal studies have obtained a great interest in the last decades. In this work, a bacterial strain namely LG1 with the ability to remove microcystin-LR (MC-LR) under laboratory conditions was isolated from Rio de la Plata River and it was identified as Achromobacter spp. This ubiquitous bacterium was able to remove 79.5% MC-LR in 7 days with average removal time of 3.33 ± 0.08, 3.06 ± 0.05, and 2.77 ± 0.05 days at 28, 32, and 36 ± 1 °C, being higher at high temperature (36 °C) with an activation energy = 16.79 ± 1.99 kJ mol-1. LG1 grew better at higher temperature (from 28 to 36 ± 1 °C) increasing the specific growth rate (μ) and reducing 2-fold the lag phase duration (LPD) without significant differences (p > 0.05) between maximum population density (MPD). In addition, LG1 showed a lysis activity on two M. aeruginosa native strains in 7 days measured as chlorophyll a (Chl-a) concentration. The lysis activity increased around 2-fold when increasing the temperature from 28 to 36 ± 1 °C. This is the first report of an indigenous bacterium belonging to the genus Achromobacter spp. isolated from the Rio de la Plata River with the capacity to remove MC-LR and lysis activity on M. aeruginosa.
Collapse
Affiliation(s)
- Melina Crettaz-Minaglia
- Laboratorio de Toxicología General, Facultad de Ciencias Exactas, UNLP, La Plata, Argentina.
- CONICET, Buenos Aires, Argentina.
| | - Maximiliano Fallico
- Laboratorio de Toxicología General, Facultad de Ciencias Exactas, UNLP, La Plata, Argentina
| | - Oswaldo Aranda
- Laboratorio de Toxicología General, Facultad de Ciencias Exactas, UNLP, La Plata, Argentina
| | - Ivan Juarez
- CONICET, Buenos Aires, Argentina
- Centro de Investigaciones y Desarrollo en Criotecnología de Alimentos, UNLP-CONICET, La Plata, Argentina
| | - Magdalena Pezzoni
- Departamento de Radiobiología, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina
| | - Cristina Costa
- Departamento de Radiobiología, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina
| | - Dario Andrinolo
- Laboratorio de Toxicología General, Facultad de Ciencias Exactas, UNLP, La Plata, Argentina
- CONICET, Buenos Aires, Argentina
| | - Leda Giannuzzi
- CONICET, Buenos Aires, Argentina
- Centro de Investigaciones y Desarrollo en Criotecnología de Alimentos, UNLP-CONICET, La Plata, Argentina
| |
Collapse
|
8
|
Biological Control of Phototrophic Biofilms in a Show Cave: The Case of Nerja Cave. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10103448] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cyanobacteria and microalgae are usually found in speleothems, rocks and walls of show caves exposed to artificial lighting. These microorganisms develop as biofilms coating the mineral surfaces and producing aesthetic, physical and chemical deterioration. A wide number of physical, chemical and environmental-friendly methods have been used for controlling the biofilms with different results. Natural biological control has been suggested by some authors as a theoretical approach but without direct evidence or application. Here we report the finding of a natural biological control of phototrophic biofilms on the speleothems of Nerja Cave, Malaga, Spain. The formation of plaques or spots where the phototrophic microorganisms disappeared can be assumed on the basis of processes of predation of bacteria, amoebas and some other organisms on the phototrophic biofilms. This study aims at investigating the potentialities of the biological control of phototrophic biofilms in caves, but the originality of these data should be confirmed in future studies with a larger number of biofilm samples in different ecological scenarios.
Collapse
|
9
|
Landsberg JH, Hendrickson J, Tabuchi M, Kiryu Y, Williams BJ, Tomlinson MC. A large-scale sustained fish kill in the St. Johns River, Florida: A complex consequence of cyanobacteria blooms. HARMFUL ALGAE 2020; 92:101771. [PMID: 32113602 DOI: 10.1016/j.hal.2020.101771] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 12/16/2019] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
In the summer of 2010, a sustained multispecies fish kill, affecting primarily adult red drum (Sciaenops ocellatus) and Atlantic stingray (Dasyatis sabina), along with various baitfish such as menhaden (Brevoortia spp.) and shad (Dorosoma spp.), was documented for six weeks along 50 km of the Lower St. Johns River (LSJR), Florida. An Aphanizomenon flos-aquae bloom was present in the freshwater reaches before the fish kill. The kill was triggered by a significant reverse-flow event and sudden influx of high-salinity water in late May that contributed to the collapse of the bloom upstream and brought euryhaline fish downstream into the vicinity of the senescing bloom or its by-products. The decomposing bloom led to a sequence of events, including the release of small amounts of cyanotoxins, bacterial lysis of cyanobacterial cells, high organic loading, and changes in the diversity and dominance of the plankton community to include Microcystis spp., Leptolyngbya sp., Pseudanabaena spp., Planktolyngbya spp., and low concentrations of Heterosigma akashiwo. Dissolved oxygen levels were within normal ranges in the reach of the fish kill, although elevated ammonia concentrations and high pH were detected farther upstream. These conditions resulted in complex pathological changes in fish that were not consistent with acute cyanotoxin exposure or with poor water quality but were attributable to chronic lethal hemolysis. Potential sources of hemolytic activity included H. akashiwo, Microcystis spp., and Bacillus cereus, a hemolytic bacterium. The continued presence of A. flos-aquae in the LSJR could have significant environmental repercussions and ideally the causal factors contributing to bloom growth and maintenance should be fully understood and managed.
Collapse
Affiliation(s)
- Jan H Landsberg
- Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission, 100 Eighth Avenue Southeast, St. Petersburg, FL, 33701, USA.
| | - John Hendrickson
- St. Johns River Water Management District, P.O. Box 1429, Palatka, FL, 32178, USA
| | - Maki Tabuchi
- Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission, 100 Eighth Avenue Southeast, St. Petersburg, FL, 33701, USA
| | - Yasunari Kiryu
- Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission, 100 Eighth Avenue Southeast, St. Petersburg, FL, 33701, USA
| | - B James Williams
- Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission, 100 Eighth Avenue Southeast, St. Petersburg, FL, 33701, USA
| | - Michelle C Tomlinson
- Center for Coastal Monitoring and Assessment, National Ocean Service, National Oceanic and Atmospheric Administration, 1305 East-West Highway, Silver Spring, MD, 20910, USA
| |
Collapse
|
10
|
Bacteria as biological control agents of freshwater cyanobacteria: is it feasible beyond the laboratory? Appl Microbiol Biotechnol 2018; 102:9911-9923. [DOI: 10.1007/s00253-018-9391-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 09/07/2018] [Accepted: 09/09/2018] [Indexed: 12/14/2022]
|
11
|
Boltyanskaya YV, Kevbrin VV. Trophic interactions of proteolytic bacteria Proteinivorax tanatarense in an alkaliphilic microbial community. Microbiology (Reading) 2016. [DOI: 10.1134/s0026261716040032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
12
|
Van Wichelen J, Vanormelingen P, Codd GA, Vyverman W. The common bloom-forming cyanobacterium Microcystis is prone to a wide array of microbial antagonists. HARMFUL ALGAE 2016; 55:97-111. [PMID: 28073551 DOI: 10.1016/j.hal.2016.02.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 02/18/2016] [Accepted: 02/19/2016] [Indexed: 06/06/2023]
Abstract
Many degraded waterbodies around the world are subject to strong proliferations of cyanobacteria - notorious for their toxicity, high biomass build-up and negative impacts on aquatic food webs - the presence of which puts serious limits on the human use of affected water bodies. Cyanobacterial blooms are largely regarded as trophic dead ends since they are a relatively poor food source for zooplankton. As a consequence, their population dynamics are generally attributed to changes in abiotic conditions (bottom-up control). Blooms however generally contain a vast and diverse community of micro-organisms of which some have shown devastating effects on cyanobacterial biomass. For Microcystis, one of the most common bloom-forming cyanobacteria worldwide, a high number of micro-organisms (about 120 taxa) including viruses, bacteria, microfungi, different groups of heterotrophic protists, other cyanobacteria and several eukaryotic microalgal groups are currently known to negatively affect its growth by infection and predation or by the production of allelopathic compounds. Although many of these specifically target Microcystis, sharp declines of Microcystis biomass in nature are only rarely assigned to these antagonistic microbiota. The commonly found strain specificity of their interactions may largely preclude strong antagonistic effects on Microcystis population levels but may however induce compositional shifts that can change ecological properties such as bloom toxicity. These highly specific interactions may form the basis of a continuous arms race (co-evolution) between Microcystis and its antagonists which potentially limits the possibilities for (micro)biological bloom control.
Collapse
Affiliation(s)
- Jeroen Van Wichelen
- Protistology and Aquatic Ecology, Biology Department, Ghent University, Krijgslaan 281 (S8), 9000 Gent, Belgium.
| | - Pieter Vanormelingen
- Protistology and Aquatic Ecology, Biology Department, Ghent University, Krijgslaan 281 (S8), 9000 Gent, Belgium
| | - Geoffrey A Codd
- Biological and Environmental Sciences, School of Natural Sciences, University of Stirling, Stirling FK9 4LA, Scotland, UK
| | - Wim Vyverman
- Protistology and Aquatic Ecology, Biology Department, Ghent University, Krijgslaan 281 (S8), 9000 Gent, Belgium
| |
Collapse
|
13
|
Luo J, Wang Y, Tang S, Liang J, Lin W, Luo L. Isolation and identification of algicidal compound from Streptomyces and algicidal mechanism to Microcystis aeruginosa. PLoS One 2013; 8:e76444. [PMID: 24098501 PMCID: PMC3789699 DOI: 10.1371/journal.pone.0076444] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 08/25/2013] [Indexed: 11/18/2022] Open
Abstract
The biological control of cyanobacterial harmful algal blooms (cyanoHABs) is important to promote human health, environmental protection, and economic growth. Active algicidal compounds and algicidal mechanisms should be identified and investigated to control cyanoHABs. In this study, the algicidal actinobacterium Streptomyces sp. L74 was isolated from the soil of a nearby pond which located in the center lake of Guanghzou Higher Education Mega Center. Results showed that the algicidal activities of cyanoHABs are mainly achieved via an indirect attack by producing algicidal compounds. All active algicidal compounds are hydrophilic substances that are heat and pH stable. In the present study, an active compound (B3) was isolated and purified by high-performance liquid chromatography and identified as a type of triterpenoid saponin (2-hydroxy-12-oleanene-3, 28-O-D-glucopyranosyl) with a molecular formula of C42H70O13 as determined by infrared spectrometry, electrospray ionization mass spectrometry, and nuclear magnetic resonance. Active algicidal compounds from Streptomyces sp. L74 were shown to disrupt the antioxidant systems of Microcystis aeruginosa cells.
Collapse
Affiliation(s)
- Jianfei Luo
- College of Bioscience and Bioengineering, South China University of Technology, Guangzhou, Pr China
| | - Yuan Wang
- College of Bioscience and Bioengineering, South China University of Technology, Guangzhou, Pr China
| | - Shuishui Tang
- College of Bioscience and Bioengineering, South China University of Technology, Guangzhou, Pr China
| | - Jianwen Liang
- College of Bioscience and Bioengineering, South China University of Technology, Guangzhou, Pr China
| | - Weitie Lin
- College of Bioscience and Bioengineering, South China University of Technology, Guangzhou, Pr China
- * E-mail: (WTL), (LXL)
| | - Lixin Luo
- College of Bioscience and Bioengineering, South China University of Technology, Guangzhou, Pr China
- * E-mail: (WTL), (LXL)
| |
Collapse
|
14
|
Wang H, Zhang W, Chen L, Wang J, Liu T. The contamination and control of biological pollutants in mass cultivation of microalgae. BIORESOURCE TECHNOLOGY 2013. [PMID: 23186675 DOI: 10.1016/j.biortech.2012.10.158] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The potential of microalgae as a biomass feedstock for biofuels, bioproducts and as a technological solution for CO(2) fixation is subject to intense academic and industrial researches. However, current microalgal mass culture technologies have failed to produce bulk volume of microalgal biomass at low cost, because the contaminations of biological pollutants become a big constraint in mass cultivation and impede the industrial process. Here the transmission routes, contamination mechanisms of biological pollutants both in open ponds and photobioreactors are described and recent attempts to overcome the barrier are reviewed. What worth noting, unlike conventional microbial fermentation which uses a pure monoculture, the cultivation of microalgae is a complicated symbiotic system of microalgae-bacterial-zooplankton where the target microalgae dominate, cross infection or contamination by biological pollutants is inevitable and it will require much further research. Further investigation and development of control methods are necessary, particularly microalgal strain selection.
Collapse
Affiliation(s)
- Hui Wang
- CAS Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101, PR China
| | | | | | | | | |
Collapse
|
15
|
Shi L, Cai Y, Kong F, Yu Y. Specific association between bacteria and buoyant Microcystis colonies compared with other bulk bacterial communities in the eutrophic Lake Taihu, China. ENVIRONMENTAL MICROBIOLOGY REPORTS 2012; 4:669-678. [PMID: 23760939 DOI: 10.1111/1758-2229.12001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 09/23/2012] [Indexed: 06/02/2023]
Abstract
The diversity of buoyant Microcystis colony-associated, settling particle-associated and free-living freshwater bacteria in the eutrophic Lake Taihu in China was compared by the polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) of 16S rRNA genes and by clone library analysis. The cluster analysis of DGGE profiles revealed that the buoyant Microcystis colony associates collected in summer and winter were clustered together and were distinct from settling particle-associated and free-living bacteria. In contrast, the bacterial communities of the latter two populations collected in summer were clustered together and varied from those collected in winter. The diversity indices of the Microcystis-associated bacterial population were significantly lower than those of the other two bulk bacterial communities (P < 0.05). Clone library analysis revealed that no shared operational taxonomic units were found in the three populations. Phylogenetic analysis confirmed that buoyant Microcystis-associated bacteria were distinct from the other communities and that they were dominated by Alphaproteobacteria, Betaproteobacteria and Gammaproteobacteria. Proteobacteria, Bacteroidetes and Actinobacteria were prevalent in all three habitats. Other bacterial taxa such as Planctomycetes, Verrucomicrobia, Gemmatimonadetes and Acidobacteria were associated with settling particles and with the water column. Buoyant Microcystis colonies, settling particles and the water column in the eutrophic lake are thus inhabited by different bacterial flora. In addition, specific bacterial communities are associated with buoyant Microcystis colonies.
Collapse
Affiliation(s)
- Limei Shi
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China
| | | | | | | |
Collapse
|
16
|
Shi S, Tang D, Liu Y. Effects of an algicidal bacterium Pseudomonas mendocina on the growth and antioxidant system of Aphanizomenon flos-aquae. Curr Microbiol 2009; 59:107-12. [PMID: 19365689 DOI: 10.1007/s00284-009-9404-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2008] [Revised: 12/10/2008] [Accepted: 03/11/2009] [Indexed: 11/24/2022]
Abstract
Evident effect of an algicidal bacterium Pseudomonas mendocina on the growth and antioxidant system of Aphanizomenon flos-aquae was detected in this experiment. Seven parameters including the chlorophyll a contents, Fv/Fm values, reactive oxygen species (ROS), malonaldehyde (MDA), catalase (CAT), peroxide dismutase (POD), and superoxide dismutase (SOD) were tested in the cyanobacterium A. flos-aquae cells after inoculation with the algicidal bacterium Pseudomonas mendocina DC10. It was shown from the experiment that the growth of the treated cyanobacterium A. flos-aquae was significantly restrained, which was expressed as great reductions in the chlorophyll a contents and Fv/Fm values. At the same time, the treated cyanobacterial cells exhibited an obvious increase in the production of ROS and MDA compared with the control. CAT and POD activities in the treated group kept at high level, however, they both reduced significantly on day 6. SOD activities in the treated A. flos-aquae showed obvious declines after inoculation, and great augmentations on day 3 and 4, thereafter, they kept in a declining tendency. The results showed the oxidative stresses induced by the bacterium could be a killing agent of the cyanobacterium A. flos-aquae cells.
Collapse
Affiliation(s)
- Shunyu Shi
- Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.
| | | | | |
Collapse
|
17
|
Doucette G, Maneiro I, Riveiro I, Svensen C. Phycotoxin Pathways in Aquatic Food Webs: Transfer, Accumulation and Degradation. ECOLOGICAL STUDIES 2006. [DOI: 10.1007/978-3-540-32210-8_22] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
|
18
|
|