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Huang B, Ge L, Xiang D, Tan G, Liu L, Yang L, Jing Y, Liu Q, Chen W, Li Y, He H, Sun H, Pan Q, Yi K. Isolation, characterization, and genomic analysis of a lytic bacteriophage, PQ43W, with the potential of controlling bacterial wilt. Front Microbiol 2024; 15:1396213. [PMID: 39149212 PMCID: PMC11324598 DOI: 10.3389/fmicb.2024.1396213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 06/17/2024] [Indexed: 08/17/2024] Open
Abstract
Bacterial wilt (BW) is a devastating plant disease caused by the soil-borne bacterium Ralstonia solanacearum species complex (Rssc). Numerous efforts have been exerted to control BW, but effective, economical, and environmentally friendly approaches are still not available. Bacteriophages are a promising resource for the control of bacterial diseases, including BW. So, in this study, a crop BW pathogen of lytic bacteriophage was isolated and named PQ43W. Biological characterization revealed PQ43W had a short latent period of 15 min, 74 PFU/cell of brust sizes, and good stability at a wide range temperatures and pH but a weak resistance against UV radiation. Sequencing revealed phage PQ43W contained a circular double-stranded DNA genome of 47,156 bp with 65 predicted open reading frames (ORFs) and genome annotation showed good environmental security for the PQ43W that no tRNA, antibiotic resistance, or virulence genes contained. Taxonomic classification showed PQ43W belongs to a novel genus of subfamily Kantovirinae under Caudoviricetes. Subsequently, a dose of PQ43W for phage therapy in controlling crop BW was determined: 108 PFU*20 mL per plant with non-invasive irrigation root application twice by pot experiment. Finally, a field experiment of PQ43W showed a significantly better control effect in crop BW than the conventional bactericide Zhongshengmycin. Therefore, bacteriophage PQ43W is an effective bio-control resource for controlling BW diseases, especially for crop cultivation.
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Affiliation(s)
- Binbin Huang
- China Tobacco Hunan Industrial Co., Ltd., Changsha, China
- Hunan Provincial Engineering and Technology Research Center for Agricultural Microbiology Application, Hunan Institute of Microbiology, Changsha, China
| | - Long Ge
- Qingdao NABT PhagePharm Co., Ltd., Qingdao, China
| | - Dong Xiang
- China Tobacco Hunan Industrial Co., Ltd., Changsha, China
| | - Ge Tan
- China Tobacco Hunan Industrial Co., Ltd., Changsha, China
| | - Lijia Liu
- China Tobacco Hunan Industrial Co., Ltd., Changsha, China
| | - Lei Yang
- China Tobacco Hunan Industrial Co., Ltd., Changsha, China
| | - Yongfeng Jing
- China Tobacco Hunan Industrial Co., Ltd., Changsha, China
| | - Qingshu Liu
- Hunan Provincial Engineering and Technology Research Center for Agricultural Microbiology Application, Hunan Institute of Microbiology, Changsha, China
| | - Wu Chen
- College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Ye Li
- Hunan Provincial Engineering and Technology Research Center for Agricultural Microbiology Application, Hunan Institute of Microbiology, Changsha, China
| | - Haoxin He
- College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Huzhi Sun
- Qingdao NABT PhagePharm Co., Ltd., Qingdao, China
| | - Qiang Pan
- Qingdao NABT PhagePharm Co., Ltd., Qingdao, China
- Institute of Special Food, Qingdao Agricultural University, Qingdao, China
| | - Ke Yi
- China Tobacco Hunan Industrial Co., Ltd., Changsha, China
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Ning W, Luo X, Zhang Y, Tian P, Xiao Y, Li S, Yang X, Li F, Zhang D, Zhang S, Liu Y. Broad-spectrum nano-bactericide utilizing antimicrobial peptides and bimetallic Cu-Ag nanoparticles anchored onto multiwalled carbon nanotubes for sustained protection against persistent bacterial pathogens in crops. Int J Biol Macromol 2024; 265:131042. [PMID: 38521320 DOI: 10.1016/j.ijbiomac.2024.131042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 03/14/2024] [Accepted: 03/19/2024] [Indexed: 03/25/2024]
Abstract
Worldwide crop yields are threatened by persistent pathogenic bacteria that cause significant damage and jeopardize global food security. Chemical pesticides have shown limited effectiveness in protecting crops from severe yield loss. To address this obstacle, there is a growing need to develop environmentally friendly bactericides with broad-spectrum and sustained protection against persistent crop pathogens. Here, we present a method for preparing a nanocomposite that combines antimicrobial peptides (AMPs) and bimetallic Cu-Ag nanoparticles anchored onto multiwalled carbon nanotubes (MWCNTs). The nanocomposite exhibited dual antibacterial activity by disrupting bacterial cell membranes and splicing nucleic acids. By functionalizing MWCNTs with small AMPs (sAMPs), we achieved enhanced stability and penetration of the nanocomposite, and improved loading capacity of the Cu-Ag nanoparticles. The synthesized MWCNTs&CuNCs@AgNPs@P nanocomposites demonstrated broad-spectrum lethality against both Gram-positive and Gram-negative bacterial pathogens. Glasshouse pot trials confirmed the efficacy of the nanocomposites in protecting rice crops against bacterial leaf blight and tomato crops against bacterial wilt. These findings highlight the excellent antibacterial properties of the MWCNTs&CuNCs@AgNPs@P nanocomposite and its potential to replace chemical pesticides, offering significant advantages for agricultural applications.
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Affiliation(s)
- Weimin Ning
- Longping branch, Biology College, Hunan University, Changsha 410125, China
| | - Xiangwen Luo
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Academy of Agricultural Science, Changsha 410125, China
| | - Yu Zhang
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Academy of Agricultural Science, Changsha 410125, China
| | - Peijie Tian
- Plant Protection College, Yunnan Agricultural University, Kunming 650000, China
| | - Youlun Xiao
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Academy of Agricultural Science, Changsha 410125, China
| | - Shijun Li
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Academy of Agricultural Science, Changsha 410125, China
| | - Xiao Yang
- Longping branch, Biology College, Hunan University, Changsha 410125, China
| | - Fan Li
- Plant Protection College, Yunnan Agricultural University, Kunming 650000, China
| | - Deyong Zhang
- Longping branch, Biology College, Hunan University, Changsha 410125, China; Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Academy of Agricultural Science, Changsha 410125, China
| | - Songbai Zhang
- Longping branch, Biology College, Hunan University, Changsha 410125, China; Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Academy of Agricultural Science, Changsha 410125, China.
| | - Yong Liu
- Longping branch, Biology College, Hunan University, Changsha 410125, China; Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Academy of Agricultural Science, Changsha 410125, China.
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Eisfeld C, van Breukelen BM, Medema G, van der Wolf JM, Velstra J, Schijven JF. QMRA of Ralstonia solanacearum in potato cultivation: Risks associated with irrigation water recycled through managed aquifer recharge. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:166181. [PMID: 37572894 DOI: 10.1016/j.scitotenv.2023.166181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 08/05/2023] [Accepted: 08/07/2023] [Indexed: 08/14/2023]
Abstract
Agricultural aquifer storage recovery and transfer (ASTR) stores excess fresh water for later reuse in irrigation. Moreover, water quality improves because chemical pollutants and pathogens will be removed by degradation and attachment to the aquifer material. The source water may contain the bacterial plant pathogen Ralstonia solanacearum which causes plant infections and high yield losses. We used quantitative microbial risk assessment (QMRA) to investigate the removal of R. solanacearum during ASTR to predict infection risks of potato plants after irrigation with the recovered water. Laboratory experiments analyzed the ASTR treatment by investigating the bacterial die-off in the water phase and the removal by attachment to the aquifer sediment. Die-off in the water phase depends on the residence time and ranged between 1.3 and 2.7 log10 after 10 or 60 days water storage, respectively. A subpopulation of the bacteria persisted for a prolonged time at low concentrations which may pose a risk if the water is recovered too early. However, the natural aquifer sand filtration proofed to be highly effective in removing R. solanacearum by attachment which depends on the distance between injection and abstraction well. The high removal by attachment alone (18 log10 after 1 m) would reduce bacterial concentrations to negligible numbers. Upscaling to longer soil passages is discussed in the paper. Infection risks of potato plants were calculated using a dose-response model and ASTR treatment resulted in negligible infection risks of a single plant, but also when simulating the irrigation of a 5 ha potato field. This is the first QMRA that analyzed an agricultural ASTR and the fate of a plant pathogen focusing on plant health. QMRA is a useful (water) management tool to evaluate the treatment steps of water reclamation technologies with the aim to provide safe irrigation water and reduce risks disseminating plant diseases.
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Affiliation(s)
- Carina Eisfeld
- Delft University of Technology, Faculty of Civil Engineering and Geosciences, Department of Water Management, Stevinweg 1, 2628 CN Delft, the Netherlands.
| | - Boris M van Breukelen
- Delft University of Technology, Faculty of Civil Engineering and Geosciences, Department of Water Management, Stevinweg 1, 2628 CN Delft, the Netherlands
| | - Gertjan Medema
- Delft University of Technology, Faculty of Civil Engineering and Geosciences, Department of Water Management, Stevinweg 1, 2628 CN Delft, the Netherlands; KWR Water Research Institute, Water Quality & Health, Groningenhaven 7, 3433 PE, Nieuwegein, the Netherlands
| | - Jan M van der Wolf
- Wageningen Plant Research, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands
| | - Jouke Velstra
- Acacia Water B.V., Van Hogendorpplein 4, 2805 BM Gouda, the Netherlands
| | - Jack F Schijven
- National Institute of Public Health and the Environment, Department of Statistics, Informatics and Modelling, 3720 BA Bilthoven, the Netherlands; Utrecht University, Faculty of Geosciences, Department of Earth Sciences, Heidelberglaan 2, 3584 CS Utrecht, the Netherlands
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Hamdy E, Al-Askar AA, El-Gendi H, Khamis WM, Behiry SI, Valentini F, Abd-Elsalam KA, Abdelkhalek A. Zinc Oxide Nanoparticles Biosynthesized by Eriobotrya japonica Leaf Extract: Characterization, Insecticidal and Antibacterial Properties. PLANTS (BASEL, SWITZERLAND) 2023; 12:2826. [PMID: 37570980 PMCID: PMC10421472 DOI: 10.3390/plants12152826] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/15/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023]
Abstract
Zinc oxide nanoparticles (ZnO-NPs) have gained significant attention in nanotechnology due to their unique properties and potential applications in various fields, including insecticidal and antibacterial activities. The ZnO-NPs were biosynthesized by Eriobotrya japonica leaf extract and characterized by various techniques such as UV-visible (UV-vis) spectrophotometer, X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and zeta potential analysis. The results of SEM revealed that NPs were irregular and spherical-shaped, with a diameter between 5 and 27 nm. Meanwhile, DLS supported that the measured size distributions were 202.8 and 94.7 nm at 11.1° and 90.0°, respectively, which supported the polydisperse nature of NPs, and the corresponding zeta potential was -20.4 mV. The insecticidal activity of the produced ZnO-NPs was determined against the adult stage of coleopteran pests, Sitophilus oryzae (Linnaeus) (Curculionidae) and Tribolium castaneum (Herbst) (Tenebrionidae). The LC50 values of ZnO-NPs against adults of S. oryzae and T. castaneum at 24 h of exposure were 7125.35 and 5642.65 μg/mL, respectively, whereas the LC90 values were 121,824.56 and 66,825.76 μg/mL, respectively. Moreover, the biosynthesized nanoparticles exhibited antibacterial activity against three potato bacterial pathogens, and the size of the inhibition zone was concentration-dependent. The data showed that the inhibition zone size increased with an increase in the concentration of nanoparticles for all bacterial isolates tested. The highest inhibition zone was observed for Ralstonia solanacearum at a concentration of 5 µg/mL, followed by Pectobacterium atrosepticum and P. carotovorum. Eventually, ZnO-NPs could be successfully used as an influential agent in pest management programs against stored-product pests and potato bacterial diseases.
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Affiliation(s)
- Esraa Hamdy
- Plant Protection and Biomolecular Diagnosis Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, Alexandria 21934, Egypt;
| | - Abdulaziz A. Al-Askar
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Hamada El-Gendi
- Bioprocess Development Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications, New Borg El-Arab City 21934, Egypt;
| | - Wael M. Khamis
- Plant Protection Research Institute, Agriculture Research Center, Al-Sabhia, Alexandria 21616, Egypt;
| | - Said I. Behiry
- Agricultural Botany Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria 21531, Egypt;
| | - Franco Valentini
- Istituto Agronomico Mediterraneo di Bari, Via Ceglie 9, Valenzano, 70010 Bari, Italy;
| | - Kamel A. Abd-Elsalam
- Plant Pathology Research Institute, Agricultural Research Centre, Giza 12619, Egypt
| | - Ahmed Abdelkhalek
- Plant Protection and Biomolecular Diagnosis Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, Alexandria 21934, Egypt;
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