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Li Y, Qin M, Han S, Wang Y, Gao C, Niu W, Xia X. Elimination of Microcystis aeruginosa through Leuconostoc mesenteroides DH and its underlying mechanism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168290. [PMID: 37939934 DOI: 10.1016/j.scitotenv.2023.168290] [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: 09/07/2023] [Revised: 10/25/2023] [Accepted: 10/31/2023] [Indexed: 11/10/2023]
Abstract
Microcystis aeruginosa is ubiquitously found in various water bodies and can produce microcystins (MCs), which threaten the health of aquatic animals and human beings. The elimination of excessive M. aeruginosa is beneficial for the protection of the ecosystems and public health. In this regard, algae-lysing bacteria have been extensively studied as an effective measure for their eradication. However, the active substances generated by algae-lysing bacteria are limited. For this study, we reveal that the phenyllactic acid (PLA) produced by Leuconostoc mesenteroides DH exhibits high efficacy for the removal of M. aeruginosa, and explore the elimination mechanism of strain DH on M. aeruginosa. It was found that a cell-free supernatant of strain DH possessed high removal activities against M. aeruginosa. Abundant reactive oxygen species were induced in algal cells following exposure to strain DH supernatant, as well as superoxide dismutase and catalase responses. Furthermore, the integrity of algal cell membranes and photosynthesis was seriously damaged. Interestingly, added exogenous eugenol significantly inhibited the synthesis of active substance produced by strain DH, which further identified that PLA is one of the active substances that contribute to the eradication of M. aeruginosa on the basis of metabolomics analysis. Our finding demonstrated, for the first time, that PLA (as an anti-cyanobacterial compound) can be used for the removal of M. aeruginosa, which provides a theoretical basis for the control of M. aeruginosa.
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Affiliation(s)
- Yi Li
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China; Henan Province Engineering Laboratory for Bioconversion Technology of Functional Microbes, Xinxiang 453007, China
| | - Mengyuan Qin
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China; Henan Province Engineering Laboratory for Bioconversion Technology of Functional Microbes, Xinxiang 453007, China
| | - Shuo Han
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China; Henan Province Engineering Laboratory for Bioconversion Technology of Functional Microbes, Xinxiang 453007, China
| | - Yuqi Wang
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China; Henan Province Engineering Laboratory for Bioconversion Technology of Functional Microbes, Xinxiang 453007, China
| | - Chao Gao
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China; Henan Province Engineering Laboratory for Bioconversion Technology of Functional Microbes, Xinxiang 453007, China
| | - Wenfang Niu
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China; Henan Province Engineering Laboratory for Bioconversion Technology of Functional Microbes, Xinxiang 453007, China
| | - Xiaohua Xia
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China.
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Ko SR, Le VV, Srivastava A, Kang M, Oh HM, Ahn CY. Algicidal activity of a novel bacterium, Qipengyuania sp. 3-20A1M, against harmful Margalefidinium polykrikoides: Effects of its active compound. MARINE POLLUTION BULLETIN 2023; 186:114397. [PMID: 36493515 DOI: 10.1016/j.marpolbul.2022.114397] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 11/14/2022] [Accepted: 11/20/2022] [Indexed: 06/17/2023]
Abstract
Margalefidinium polykrikoides causes significant economic losses in the aquaculture industry by red tide formation. Algicidal bacteria have attracted research interests as a potential bloom control approach without secondary pollution. Qipengyuania sp. 3-20A1M, isolated from surface seawater, exerted an algicidal effect on M. polykrikoides. However, it exhibited a significantly lower algicidal activity toward other microalgae. It reduced photosynthetic efficiency of M. polykrikoides and induced lipid peroxidation and cell disruption. The growth inhibition of M. polykrikoides reached 64.9 % after 24 h of co-culturing, and expression of photosynthesis-related genes was suppressed. It killed M. polykrikoides indirectly by secreting algicidal compounds. The algicide was purified and identified as pyrrole-2-carboxylic acid. After 24 h of treatment with pyrrole-2-carboxylic acid (20 μg/mL), 60.8 % of the M. polykrikoides cells were destroyed. Overall, our results demonstrated the potential utility of Qipengyuania sp. 3-20A1M and its algicidal compound in controlling M. polykrikoides blooms in the marine ecosystem.
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Affiliation(s)
- So-Ra Ko
- Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ve Van Le
- Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Ankita Srivastava
- Department of Botany, Siddharth University, Kapilvastu, Siddharth Nagar, 272202, Uttar Pradesh, India
| | - Mingyeong Kang
- Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Hee-Mock Oh
- Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Chi-Yong Ahn
- Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea.
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3
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Zhang F, Fan Y, Zhang D, Chen S, Bai X, Ma X, Xie Z, Xu H. Effect and mechanism of the algicidal bacterium Sulfitobacter porphyrae ZFX1 on the mitigation of harmful algal blooms caused by Prorocentrum donghaiense. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114475. [PMID: 33618477 DOI: 10.1016/j.envpol.2020.114475] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 03/12/2020] [Accepted: 03/25/2020] [Indexed: 06/12/2023]
Abstract
Sulfitobacter porphyrae ZFX1, isolated from surface seawater of the East China Sea during a Prorocentrum donghaiense bloom recession, exhibits high algicidal activity against P. donghaiense. To evaluate the algicidal effect of ZFX1, the algicidal mode and stability were investigated. The results showed that ZFX1 indirectly attacked algae by secreting algicidal compounds, and the algicidal activity of the ZFX1 supernatant was insensitive to different temperatures, light intensities and pH values (pH 3-12). To explore the algicidal mechanism of the ZFX1 supernatant, its effects on the morphological and ultrastructural alterations, photosynthetic capacity, reactive oxygen species (ROS) and antioxidative system of P. donghaiense were investigated. Scanning and transmission electron microscopy revealed that the ZFX1 supernatant destroyed the algal cell membrane structure and caused intracellular leakage. The decrease in the chlorophyll a content and the marked declines in both the photosynthetic efficiency (Fv/Fm) and the electron transport rate (rETR) indicated that the ZFX1 supernatant could damage the photosynthetic system of P. donghaiense. The excessive production of ROS in algal cells demonstrated the oxidative damage triggered by the ZFX1 supernatant. Although the antioxidant defense system of P. donghaiense was activated to scavenge excessive ROS, lipid oxidation occurred. The fatty acid composition profile indicated that the ZFX1 supernatant markedly increased the contents of two saturated fatty acids and a monounsaturated fatty acid and decreased the proportion of two polyunsaturated fatty acids, which resulted in lipids with a lower degree of unsaturation (DU). The decline in the DU decreased the lipid fluidity and rigidified the membrane system, and these effects destroyed the function of the membrane system and ultimately resulted in algal cell death. Therefore, ZFX1 probably plays a key role in mitigating P. donghaiense bloom by inducing lipid oxidation, decreasing the DU of lipids and ultimately destroying the membrane systems of algal cells.
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Affiliation(s)
- Fuxing Zhang
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, PR China
| | - Yongxiang Fan
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, PR China; Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, Fujian, 361102, PR China
| | - Danyang Zhang
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, PR China; Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, Fujian, 361102, PR China
| | - Shuangshuang Chen
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, PR China; Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, Fujian, 361102, PR China
| | - Xue Bai
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, PR China
| | - Xiaohong Ma
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, PR China
| | - Zhong Xie
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, PR China
| | - Hong Xu
- State Key Laboratory of Cellular Stress Biology, and School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, PR China; Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, Fujian, 361102, PR China.
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Du XP, Cai ZH, Zuo P, Meng FX, Zhu JM, Zhou J. Temporal Variability of Virioplankton during a Gymnodinium catenatum Algal Bloom. Microorganisms 2020; 8:microorganisms8010107. [PMID: 31940944 PMCID: PMC7023004 DOI: 10.3390/microorganisms8010107] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 12/18/2019] [Accepted: 01/10/2020] [Indexed: 01/02/2023] Open
Abstract
Viruses are key biogeochemical engines in the regulation of the dynamics of phytoplankton. However, there has been little research on viral communities in relation to algal blooms. Using the virMine tool, we analyzed viral information from metagenomic data of field dinoflagellate (Gymnodinium catenatum) blooms at different stages. Species identification indicated that phages were the main species. Unifrac analysis showed clear temporal patterns in virioplankton dynamics. The viral community was dominated by Siphoviridae, Podoviridae, and Myoviridae throughout the whole bloom cycle. However, some changes were observed at different phases of the bloom; the relatively abundant Siphoviridae and Myoviridae dominated at pre-bloom and peak bloom stages, while at the post-bloom stage, the members of Phycodnaviridae and Microviridae were more abundant. Temperature and nutrients were the main contributors to the dynamic structure of the viral community. Some obvious correlations were found between dominant viral species and host biomass. Functional analysis indicated some functional genes had dramatic response in algal-associated viral assemblages, especially the CAZyme encoding genes. This work expands the existing knowledge of algal-associated viruses by characterizing viral composition and function across a complete algal bloom cycle. Our data provide supporting evidence that viruses participate in dinoflagellate bloom dynamics under natural conditions.
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Affiliation(s)
- Xiao-Peng Du
- The Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Zhong-Hua Cai
- The Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Ping Zuo
- The School of Geography and Ocean Science, Nanjing University, Nanjing 210000, China;
| | - Fan-Xu Meng
- Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310000, China
| | - Jian-Ming Zhu
- The Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Jin Zhou
- The Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Correspondence:
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Nishu SD, Kang Y, Han I, Jung TY, Lee TK. Nutritional status regulates algicidal activity of Aeromonas sp. L23 against cyanobacteria and green algae. PLoS One 2019; 14:e0213370. [PMID: 30861041 PMCID: PMC6413897 DOI: 10.1371/journal.pone.0213370] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 02/19/2019] [Indexed: 12/24/2022] Open
Abstract
Algicidal bacteria have received broad acceptance as an ecofriendly tool for controlling harmful algal blooms. However, their practical application is still limited to the lab-scale tests due to the complex alga–bacterium interactions in different nutrient statuses. In this study, the Aeromonas sp. L23 that exhibit relatively wide-spectrum in algicidal activity was isolated from a eutrophic agricultural lake. The physiological response of cyanobacteria and green to the algicidal activity under varied nutritional status were studied in an alga-bacterial co-culture. The algicidal activities of L23 against Microcystis aeruginosa UTEX LB 2385, Microcystis aeruginosa NHSB, Anabaena variabilis AG10064, Scenedesmus quadricauda AG10003, and Chlorella vulgaris AG10034 were 88 ± 1.2%, 94 ± 2.6%, 93 ± 0.5%, 82 ± 1.1%, and 47 ± 0.9%, respectively. The L23 cells had low algicidal activity in cell pellet (3%–9%) compared with the cell-free supernatant (78%–93%), indicating that the activity is induced by extracellular substances. Adding glucose, NaNO3, NH4Cl, and KH2PO4 to the co-culture raised the algicidal activity of the L23 against green algae by 5%–50%. Conversely, a 10%–20% decrease in activity occurred against the target cyanobacteria except M. aeruginosa UTEX LB 2385. These results indicated that the interspecific algicidal activity changes according to the nutritional status, which means that the alga-bacterium interaction will be more complex in the field where the nutritional status changes from time to time.
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Affiliation(s)
- Susmita Das Nishu
- Department of Environmental Engineering, Yonsei University, Wonju, Republic of Korea
| | - Yunhee Kang
- Department of Environmental Engineering, Yonsei University, Wonju, Republic of Korea
| | - Il Han
- Department of Environmental Engineering, Yonsei University, Wonju, Republic of Korea
| | - Tae Young Jung
- Department of Environmental Engineering, Yonsei University, Wonju, Republic of Korea
| | - Tae Kwon Lee
- Department of Environmental Engineering, Yonsei University, Wonju, Republic of Korea
- * E-mail:
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6
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Algicidal Activity of Novel Marine Bacterium Paracoccus sp. Strain Y42 against a Harmful Algal-Bloom-Causing Dinoflagellate, Prorocentrum donghaiense. Appl Environ Microbiol 2018; 84:AEM.01015-18. [PMID: 30054369 DOI: 10.1128/aem.01015-18] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 07/12/2018] [Indexed: 11/20/2022] Open
Abstract
Prorocentrum donghaiense blooms occur frequently in the Yangtze River estuary and the adjacent East China Sea. These blooms have damaged marine ecosystems and caused enormous economic losses over the past 2 decades. Thus, highly efficient, low-cost, ecofriendly approaches must be developed to control P. donghaiense blooms. In this study, a bacterial strain (strain Y42) was identified as Paracoccus sp. and was used to lyse P. donghaiense The supernatant of the strain Y42 culture was able to lyse P. donghaiense, and the algicidal activity of this Y42 supernatant was stable with different temperatures and durations of light exposure and over a wide pH range. In addition to P. donghaiense, Y42 showed high algicidal activity against Alexandrium minutum, Scrippsiella trochoidea, and Skeletonema costatum, suggesting that it targets primarily Pyrrophyta. To clarify the algicidal effects of Y42, we assessed algal lysis and determined the chlorophyll a contents, photosynthetic activity, and malondialdehyde contents of P. donghaiense after exposure to the Y42 supernatant. Scanning electron microscopy and transmission electron microscopy analyses showed that the Y42 supernatant disrupted membrane integrity and caused algal cell breakage at the megacytic zone. Photosynthetic pigment loss and significant declines in both photosynthetic efficiency and the electron transport rate indicated that the Y42 supernatant damaged the photosynthetic system of P. donghaiense Malondialdehyde overproduction indicated that the Y42 supernatant caused lipid peroxidation and oxidative damage to membrane systems in the algal cell, ultimately leading to death. The findings of this study reveal the potential of Y42 to remove algal cells from P. donghaiense blooms.IMPORTANCEP. donghaiense is one of the most common dinoflagellate species that form harmful algal blooms, which frequently cause serious ecological pollution and pose health hazards to humans and other animals. Screening for bacteria with high algicidal activity against P. donghaiense and studying their algicidal processes and characteristics will contribute to an understanding of their algicidal effects and provide a theoretical basis for preventing algal blooms and reducing their harm to the environment. This study reports the algicidal activity and characteristics of Paracoccus against P. donghaiense The stability of the algicidal activity of Paracoccus in different environments (including different temperature, pH, and sunlight conditions) indicates its potential for use in the control of P. donghaiense blooms.
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Chen Z, Zheng W, Yang L, Boughner LA, Tian Y, Zheng T, Xu H. Lytic and Chemotactic Features of the Plaque-Forming Bacterium KD531 on Phaeodactylum tricornutum. Front Microbiol 2018; 8:2581. [PMID: 29312256 PMCID: PMC5742596 DOI: 10.3389/fmicb.2017.02581] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 12/11/2017] [Indexed: 11/13/2022] Open
Abstract
Phaeodactylum tricornutum is a dominant bloom forming species and potential biofuel feedstock. To control P. tricornutum bloom or to release lipids from P. tricornutum, we previously screened and identified the lytic bacterium Labrenzia sp. KD531 toward P. tricornutum. In the present study, we evaluated the lytic activity of Labrenzia sp. KD531 on microalgae and investigated its lytic mechanism. The results indicated that the lytic activity of KD531 was temperature- and pH-dependent, but light-independent. In addition to P. tricornutum, KD531 also showed lytic activity against other algal species, especially green algae. A quantitative analysis of algal cellular protein, carbohydrate and lipid content together with measurements of dry weight after exposure to bacteria-infected algal lysate indicated that the bacterium KD531 influenced the algal biomass by disrupting the algal cells. Both chemotactic analysis and microscopic observations of subsamples from different regions of formed plaques showed that KD531 could move toward and then directly contact algal cells. Direct contact between P. tricornutum and KD531 cells was essential for the lytic process.
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Affiliation(s)
- Zhangran Chen
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, School of Life Sciences, and State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China.,State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China.,Center for Microbial Ecology, Michigan State University, East Lansing, MI, United States
| | - Wei Zheng
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, School of Life Sciences, and State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Luxi Yang
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, School of Life Sciences, and State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Lisa A Boughner
- Center for Microbial Ecology, Michigan State University, East Lansing, MI, United States
| | - Yun Tian
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, School of Life Sciences, and State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Tianling Zheng
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, School of Life Sciences, and State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Hong Xu
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, School of Life Sciences, and State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China.,State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
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8
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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: 57] [Impact Index Per Article: 8.1] [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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9
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Xuan H, Dai X, Li J, Zhang X, Yang C, Luo F. A Bacillus sp. strain with antagonistic activity against Fusarium graminearum kills Microcystis aeruginosa selectively. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 583:214-221. [PMID: 28104332 DOI: 10.1016/j.scitotenv.2017.01.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Revised: 01/09/2017] [Accepted: 01/10/2017] [Indexed: 06/06/2023]
Abstract
Cyanobacterial harmful algal blooms (CyanoHABs) cause severe environmental problems, economic losses and threaten human health seriously. In the present study, a Bacillus sp. strain, designated as AF-1, with strong antagonistic activity against plant pathogenic fungus Fusarium graminearum was isolated from purple soil. Bacillus sp. AF-1 selectively killed Microcystis aeruginosa at low cell density (1.6×103cfu/mL), and showed the strongest bactericidal activity against M. aeruginosa NIES-843 (Ae=93%, t=6d). The algicidal substances originated from strain AF-1 were stable in the temperature range of 35-100°C, and pH range of 3-11. Cell-free filtrate of AF-1 culture caused excessive accumulation of intracellular reactive oxygen species (ROS), cell death and the efflux of intracellular components of M. aeruginosa NIES-843 cells. The expression of genes recA, psbA1, psbD1, rbcL and mcyB, involved in DNA repair, photosynthesis and microcystin synthesis of NIES 843, were significantly influenced by the cell-free filtrate of AF-1 culture. Bacillus sp. AF-1 has the potential to be developed as a bifunctional biocontrol agent to control CyanoHABs and F. graminearum caused plant disease.
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Affiliation(s)
- Huanling Xuan
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Xianzhu Dai
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, China.
| | - Jing Li
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Xiaohui Zhang
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Caiyun Yang
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Feng Luo
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400715, China
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10
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Li Y, Liu L, Xu Y, Li P, Zhang K, Jiang X, Zheng T, Wang H. Stress of algicidal substances from a bacterium Exiguobacterium sp. h10 on Microcystis aeruginosa. Lett Appl Microbiol 2016; 64:57-65. [PMID: 27714825 DOI: 10.1111/lam.12678] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/01/2016] [Accepted: 10/03/2016] [Indexed: 11/28/2022]
Abstract
Microcystis aeruginosa is a cyanobacterial bloom-causing species and is considered a serious threat to human health and biological safety. In this study, the algicidal bacterium h10 showed high algicidal effects on M. aeruginosa 7820, and strain h10 was confirmed to belong to the genus Exiguobacterium, for which the name Exiguobacterium sp. h10 is proposed. Algicidal activity and mode analysis revealed that the supernatant, rather than the bacterial cells, was responsible for the algicidal activity, indicating that the algicidal mode of strain h10 is by indirect attack through the production of algicidal substances. Analysis of the algicidal substance characteristics showed a molecular weight of <1000 Da and that algicidal substances exhibit high thermal stability and pH instability, and the characteristic functional groups of the algicidal substance mainly included carbonyl, amino and hydroxyl groups. Under the effects of the algicidal substance, the cellular pigment content was significantly decreased, and the algal cell structure and morphology were seriously damaged. The results indicate that the algicidal bacterium Exiguobacterium sp. h10 could be a potential bio-agent for controlling cyanobacterial blooms of M. aeruginosa. SIGNIFICANCE AND IMPACT OF THE STUDY In this study, the effects of algicidal substances from an algicidal bacterium Exiguobacterium sp. h10 on the toxic cyanobacterium, Microcystis aeruginosa 7820, were first investigated. The algicidal mode of action was confirmed as an indirect attack through the production of algicidal substances. The characteristics of the algicidal substance were determined, especially the functional groups analysis that confirmed the algicidal substances were glycolipid mixtures. With the stress of algicidal substances, the algal chlorophyll a synthesis, cell structure and morphology were seriously damaged. This study proved that algicidal bacteria are promising sources of potential cyanobacterial bloom-control, and provided good procedures for the identification and analysis of an algicidal bacterium and substances.
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Affiliation(s)
- Y Li
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - L Liu
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Y Xu
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - P Li
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - K Zhang
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - X Jiang
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - T Zheng
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, School of Life Sciences, Xiamen University, Xiamen, China
| | - H Wang
- College of Life Sciences, Henan Normal University, Xinxiang, China
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11
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A comprehensive insight into functional profiles of free-living microbial community responses to a toxic Akashiwo sanguinea bloom. Sci Rep 2016; 6:34645. [PMID: 27703234 PMCID: PMC5050414 DOI: 10.1038/srep34645] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 09/14/2016] [Indexed: 12/28/2022] Open
Abstract
Phytoplankton blooms are a worldwide problem and can greatly affect ecological processes in aquatic systems, but its impacts on the functional potential of microbial communities are limited. In this study, a high-throughput microarray-based technology (GeoChip) was used to profile the functional potential of free-living microbes from the Xiamen Sea Area in response to a 2011 Akashiwo sanguinea bloom. The bloom altered the overall community functional structure. Genes that were significantly (p < 0.05) increased during the bloom included carbon degradation genes and genes involved in nitrogen (N) and/or phosphorus (P) limitation stress. Such significantly changed genes were well explained by chosen environmental factors (COD, nitrite-N, nitrate-N, dissolved inorganic phosphorus, chlorophyll-a and algal density). Overall results suggested that this bloom might enhance the microbial converting of nitrate to N2 and ammonia nitrogen, decrease P removal from seawater, activate the glyoxylate cycle, and reduce infection activity of bacteriophage. This study presents new information on the relationship of algae to other microbes in aquatic systems, and provides new insights into our understanding of ecological impacts of phytoplankton blooms.
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12
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Li Y, Xu Y, Liu L, Jiang X, Zhang K, Zheng T, Wang H. First evidence of bioflocculant from Shinella albus with flocculation activity on harvesting of Chlorella vulgaris biomass. BIORESOURCE TECHNOLOGY 2016; 218:807-15. [PMID: 27423548 DOI: 10.1016/j.biortech.2016.07.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 07/07/2016] [Accepted: 07/09/2016] [Indexed: 05/22/2023]
Abstract
Bioflocculant from Shinella albus xn-1 could be used to harvest energy-producing microalga Chlorella vulgaris biomass for the first time. In this study, we investigated the flocculation activity and mode of strain xn-1, the characteristics of bioflocculant, the effect of flocculation conditions and optimized the flocculation efficiency. The results indicated that strain xn-1 exhibited flocculation activity through secreting bioflocculant; the bioflocculant with high thermal stability, pH stability and low molecular weight was proved to be not protein and polysaccharide, and flocculation active component was confirmed to contain triple bond and cumulated double bonds; algal pH, temperature and metal ions showed great impacts on the flocculation efficiency of bioflocculant; the maximum flocculation activity of bioflocculant reached 85.65% after the response surface optimization. According to the results, the bioflocculant from S. albus xn-1 could be a good potential in applications for high-efficiency harvesting of microalgae.
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Affiliation(s)
- Yi Li
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China; State Key Laboratory of Marine Environmental Science, Xiamen University, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Yanting Xu
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Lei Liu
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Xiaobing Jiang
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Kun Zhang
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Tianling Zheng
- State Key Laboratory of Marine Environmental Science, Xiamen University, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Hailei Wang
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China.
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13
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First Evidence of Altererythrobacter sp. LY02 with Indirect Algicidal Activity on the Toxic Dinoflagellate, Alexandrium tamarense. Curr Microbiol 2016; 73:550-60. [DOI: 10.1007/s00284-016-1093-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 07/01/2016] [Indexed: 11/25/2022]
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14
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Chitinase producing bacteria with direct algicidal activity on marine diatoms. Sci Rep 2016; 6:21984. [PMID: 26902175 PMCID: PMC4763246 DOI: 10.1038/srep21984] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 02/03/2016] [Indexed: 11/11/2022] Open
Abstract
Chitinase producing bacteria can involve extensively in nutrient cycling and energy flow in the aquatic environment through degradation and utilization of chitin. It is well known that diatoms cells are encased by box-like frustules composed of chitin. Thus the chitin containing of diatoms shall be a natural target of chitinase producing bacteria, however, the interaction between these two organismic groups has not been studied thus far. Therefore, in this study, the algicidal mechanism of one chitinase producing bacterium (strain LY03) on Thalassiosira pseudonana was investigated. The algicidal range and algicidal mode of strain LY03 were first studied, and then bacterial viability, chemotactic ability and direct interaction characteristic between bacteria and diatom were also confirmed. Finally, the characteristic of the intracellular algicidal substance was identified and the algicidal mechanism was determined whereby algicidal bacterial cells showed chemotaxis to algal cells, fastened themselves on algal cells with their flagella, and then produced chitinase to degrade algal cell walls, and eventually caused algal lysis and death. It is the first time to investigate the interaction between chitinase producing bacteria and diatoms, and this novel special interaction mode was confirmed in this study, which will be helpful in protection and utilization of diatoms resources.
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15
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Cai G, Yang X, Lai Q, Yu X, Zhang H, Li Y, Chen Z, Lei X, Zheng W, Xu H, Zheng T. Lysing bloom-causing alga Phaeocystis globosa with microbial algicide: An efficient process that decreases the toxicity of algal exudates. Sci Rep 2016; 6:20081. [PMID: 26847810 PMCID: PMC4742815 DOI: 10.1038/srep20081] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 11/23/2015] [Indexed: 01/04/2023] Open
Abstract
Algicidal microbes could effectively remove the harmful algae from the waters. In this study, we were concerned with the ecological influence of an algicide extracted from Streptomyces alboflavus RPS, which could completely lyse the Phaeocystis globosa cells within two days. In microcosms, 4 μg/mL of the microbial algicide could efficiently remove P. globosa cells without suppressing other aquatic organisms. Bioluminescent assays confirmed that the toxicity of microbial algicide at this concentration was negligible. Interestingly, the toxicity of P. globosa exudates was also significantly reduced after being treated with the algicide. Further experiments revealed that the microbial algicide could instantly increase the permeability of the plasma membrane and disturb the photosynthetic system, followed by the deformation of organelles, vacuolization and increasing oxidative stress. The pre-incubation of N-acetyl cysteine (NAC) verified that the rapid damages to the plasma membrane and photosynthetic system caused the algal death in the early phase, and the increasing oxidative stress killed the rest. The late accumulation and possible release of CAT also explained the decreasing toxicity of the algal culture. These results indicated that this microbial algicide has great potential in controlling the growth of P. globosa on site.
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Affiliation(s)
- Guanjing Cai
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Xujun Yang
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Qiliang Lai
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, People's Republic of China
| | - Xiaoqi Yu
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Huajun Zhang
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Yi Li
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Zhangran Chen
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Xueqian Lei
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Wei Zheng
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Hong Xu
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Tianling Zheng
- State Key Laboratory of Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
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16
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An X, Zhang B, Zhang H, Li Y, Zheng W, Yu Z, Fu L, Zheng T. Discovery of an algicidal compound from Brevibacterium sp. BS01 and its effect on a harmful algal bloom-causing species, Alexandrium tamarense. Front Microbiol 2015; 6:1235. [PMID: 26594205 PMCID: PMC4633486 DOI: 10.3389/fmicb.2015.01235] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 10/23/2015] [Indexed: 11/13/2022] Open
Abstract
Blooms of the dinoflagellate Alexandrium tamarense have become worldwide phenomena and have detrimental impacts on aquatic ecosystems and human health. In this study, a culture supernatant of the marine actinomycete BS01 exerted a strong algicidal effect on A. tamarense (ATGD98-006). The target algicide from BS01 was separated by adsorption chromatography and identified by MALDI-TOF-MS and NMR analysis. The results suggested that the purified algicidal component corresponded to a hydrophobic compound (2-isobutoxyphenyl)amine (C10H15NO) with a molecular weight of 165 Da, which exhibited a significant algicidal effect (64.5%) on A. tamarense. After incubation in 5 μg/mL of (2-isobutoxyphenyl)amine for 24 h, the algae lost mobility and sank to the bottom of the flasks, and 56.5% of the algae cells lost vitality at a concentration of 20 μg/mL (p < 0.01) despite having intact cell profiles. Morphological analysis revealed that the cell structure of A. tamarense was altered by (2-isobutoxyphenyl)amine resulting in cytoplasm degradation and the loss of organelle integrity. The images following propidium iodide staining suggested that the algal nucleus was also severely damaged and eventually degraded due to exposure to the algicidal compound. All of the results indicate that (2-isobutoxyphenyl)amine from the actinomycete might be a candidate for the control of bloom-forming A. tamarense.
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Affiliation(s)
- Xinli An
- State Key Laboratory of Marine Environmental Science and Key Laboratory of Ministry of Education for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University Xiamen, China ; Institute of Urban Environment, Chinese Academy of Sciences Xiamen, China
| | - Bangzhou Zhang
- State Key Laboratory of Marine Environmental Science and Key Laboratory of Ministry of Education for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University Xiamen, China
| | - Huajun Zhang
- State Key Laboratory of Marine Environmental Science and Key Laboratory of Ministry of Education for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University Xiamen, China
| | - Yi Li
- State Key Laboratory of Marine Environmental Science and Key Laboratory of Ministry of Education for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University Xiamen, China
| | - Wei Zheng
- State Key Laboratory of Marine Environmental Science and Key Laboratory of Ministry of Education for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University Xiamen, China
| | - Zhiming Yu
- Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences Qingdao, China
| | - Lijun Fu
- Department of Environment and Life Science, Putian University Putian, China
| | - Tianling Zheng
- State Key Laboratory of Marine Environmental Science and Key Laboratory of Ministry of Education for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University Xiamen, China
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17
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A lytic bacterium's potential application in biofuel production through directly lysing the diatom Phaeodactylum tricornutum cell. ALGAL RES 2015. [DOI: 10.1016/j.algal.2015.08.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Hou S, Shu W, Tan S, Zhao L, Yin P. Exploration of the antioxidant system and photosynthetic system of a marine algicidal Bacillus and its effect on four harmful algal bloom species. Can J Microbiol 2015; 62:49-59. [PMID: 26634608 DOI: 10.1139/cjm-2015-0425] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A novel marine bacterium, strain B1, initially showed 96.4% algicidal activity against Phaeocystis globosa. Under this situation, 3 other harmful algal species (Skeletonema costatum, Heterosigma akashiwo, and Prorocentrum donghaiense) were chosen to study the algicidal effects of strain B1, and the algicidal activities were 91.4%, 90.7%, and 90.6%, respectively. To explore the algicidal mechanism of strain B1 on these 4 harmful algal species, the characteristics of the antioxidant system and photosynthetic system were studied. Sensitivity to strain B1 supernatant, enzyme activity, and gene expression varied with algal species, while the algicidal patterns were similar. Strain B1 supernatant increased malondialdehyde contents; decreased chlorophyll a contents; changed total antioxidant and superoxide dismutase activity; and restrained psbA, psbD, and rbcL genes expression, which eventually resulted in the algal cells death. The algicidal procedure was observed using field emission scanning electron microscopy, which indicated that algal cells were lysed and cellular substances were released. These findings suggested that the antioxidant and photosynthetic system of these 4 algal species was destroyed under strain B1 supernatant stress. This is the first report to explore and compare the mechanism of a marine Bacillus against harmful algal bloom species of covered 4 phyla.
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Affiliation(s)
- Shaoling Hou
- a Key Laboratory of Water and Soil Pollution Control and Bioremediation of Guangdong Higher Education Institutes, School of Environment, Jinan University, Guangzhou 510632, People's Republic of China.,b Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wanjiao Shu
- a Key Laboratory of Water and Soil Pollution Control and Bioremediation of Guangdong Higher Education Institutes, School of Environment, Jinan University, Guangzhou 510632, People's Republic of China.,b Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou 510632, People's Republic of China
| | - Shuo Tan
- c Department of Chemistry, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ling Zhao
- a Key Laboratory of Water and Soil Pollution Control and Bioremediation of Guangdong Higher Education Institutes, School of Environment, Jinan University, Guangzhou 510632, People's Republic of China.,b Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou 510632, People's Republic of China
| | - Pinghe Yin
- c Department of Chemistry, Jinan University, Guangzhou 510632, People's Republic of China.,d Research Center of Analytical Testing, Jinan University, Guangzhou 510632, People's Republic of China
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19
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Li Y, Zhu H, Lei X, Zhang H, Guan C, Chen Z, Zheng W, Xu H, Tian Y, Yu Z, Zheng T. The first evidence of deinoxanthin from Deinococcus sp. Y35 with strong algicidal effect on the toxic dinoflagellate Alexandrium tamarense. JOURNAL OF HAZARDOUS MATERIALS 2015; 290:87-95. [PMID: 25746568 DOI: 10.1016/j.jhazmat.2015.02.070] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2014] [Revised: 02/24/2015] [Accepted: 02/25/2015] [Indexed: 06/04/2023]
Abstract
Harmful algal blooms (HABs) could be deemed hazardous materials in aquatic environment. Alexandrium tamarense is a toxic HAB causing alga, which causes serious economic losses and health problems. In this study, the bacterium Deinococcus xianganensis Y35 produced a new algicide, showing a high algicidal effect on A. tamarense. The algicidal compound was identified as deinoxanthin, a red pigment, based on high resolution mass spectrometry and NMR after the active compound was isolated and purified. Deinoxanthin exhibited an obvious inhibitory effect on algal growth, and showed algicidal activity against A. tamarense with an EC50 of 5.636 μg/mL with 12h treatment time. Based on the unique structure and characteristics of deinoxanthin, the content of reactive oxygen species (ROS) increased after 0.5h exposure, the structure of organelles including chloroplasts and mitochondria were seriously damaged. All these results firstly confirmed that deinoxanthin as the efficient and eco-environmental algicidal compound has potential to be used for controlling harmful algal blooms through overproduction of ROS.
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Affiliation(s)
- Yi Li
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
| | - Hong Zhu
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
| | - Xueqian Lei
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
| | - Huajun Zhang
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
| | - Chengwei Guan
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
| | - Zhangran Chen
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
| | - Wei Zheng
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
| | - Hong Xu
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
| | - Yun Tian
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
| | - Zhiming Yu
- Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
| | - Tianling Zheng
- State Key Laboratory of Marine Environmental Science and Key Laboratory of MOE for Coast and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
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20
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Yang C, Li Y, Zhou B, Zhou Y, Zheng W, Tian Y, Van Nostrand JD, Wu L, He Z, Zhou J, Zheng T. Illumina sequencing-based analysis of free-living bacterial community dynamics during an Akashiwo sanguine bloom in Xiamen sea, China. Sci Rep 2015; 5:8476. [PMID: 25684124 PMCID: PMC4329561 DOI: 10.1038/srep08476] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2014] [Accepted: 01/22/2015] [Indexed: 11/12/2022] Open
Abstract
Although phytoplankton are the major source of marine dissolved organic matter (DOM), their blooms are a global problem that can greatly affect marine ecological systems, especially free-living bacteria, which are the primary DOM degraders. In this study, we analyzed free-living bacterial communities from Xiamen sea during an Akashiwo sanguine bloom using Illumina MiSeq sequencing of 16S rRNA gene amplicons. The bloom was probably stimulated by low salinity and ended after abatement of eutrophication pollution. A total of 658,446 sequence reads and 11,807 OTUs were obtained in both bloom and control samples with Alpha-proteobacteria and Gamma-proteobacteria being the predominant classes detected. The bloom decreased bacterial diversity, increased species evenness, and significantly changed the bacterial community structure. Bacterial communities within the bloom were more homogeneous than those within the control area. The bacteria stimulated by this bloom included the SAR86 and SAR116 clades and the AEGEAN-169 marine group, but a few were suppressed. In addition, many bacteria known to be associated with phytoplankton were detected only in the bloom samples. This study revealed the great influence of an A. sanguinea bloom on free-living bacterial communities, and provided new insights into the relationship between bacteria and A. sanguinea in marine ecosystems.
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Affiliation(s)
- Caiyun Yang
- State Key Laboratory for Marine Environmental Science, and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Yi Li
- State Key Laboratory for Marine Environmental Science, and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Benjamin Zhou
- Department of Computer Science, Stanford University, Stanford, California 94305, USA
| | - Yanyan Zhou
- State Key Laboratory for Marine Environmental Science, and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Wei Zheng
- State Key Laboratory for Marine Environmental Science, and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Yun Tian
- State Key Laboratory for Marine Environmental Science, and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Joy D. Van Nostrand
- Institute for Environmental Genomics and Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 730722, USA
| | - Liyou Wu
- Institute for Environmental Genomics and Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 730722, USA
| | - Zhili He
- Institute for Environmental Genomics and Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 730722, USA
| | - Jizhong Zhou
- Institute for Environmental Genomics and Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 730722, USA
- Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Tianling Zheng
- State Key Laboratory for Marine Environmental Science, and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China
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21
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Draft Genome Sequence of the Anti-Algal Marine Actinomycete Streptomyces sp. JS01. GENOME ANNOUNCEMENTS 2014; 2:2/6/e01261-14. [PMID: 25477414 PMCID: PMC4256195 DOI: 10.1128/genomea.01261-14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Streptomyces sp. JS01 is the producer of an anti-algal compound that shows inhibitory activity against a harmful algal species Phaeocystis globosa and can also produce a red pigment. Its genome sequence will allow for the characterization of the anti-algal compound and the molecular mechanisms underlying its beneficial properties.
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22
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Draft Genome Sequence of the Algicidal Bacterium Mangrovimonas yunxiaonensis Strain LY01. GENOME ANNOUNCEMENTS 2014; 2:2/6/e01234-14. [PMID: 25428978 PMCID: PMC4246170 DOI: 10.1128/genomea.01234-14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Mangrovimonas yunxiaonensis LY01, a novel bacterium isolated from mangrove sediment, showed high algicidal effects on harmful algal blooms of Alexandrium tamarense. Here, we present the first draft genome sequence of this strain to further understanding of the functional genes related to algicidal activity.
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