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Qi Q, Fan C, Wu H, Sun L, Cao C. Preparation of Trichoderma asperellum Microcapsules and Biocontrol of Cucumber Powdery Mildew. Microbiol Spectr 2023; 11:e0508422. [PMID: 37102872 PMCID: PMC10269890 DOI: 10.1128/spectrum.05084-22] [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: 12/10/2022] [Accepted: 04/08/2023] [Indexed: 04/28/2023] Open
Abstract
Microencapsulation is an important technique for protecting the viability and activity of microorganisms under adverse environmental conditions. To improve biological control, controlled-release microcapsules of Trichoderma asperellum were prepared and embedded in combinations of the biodegradable wall materials sodium alginate (SA). The microcapsules were evaluated for their ability to control cucumber powdery mildew in the greenhouse. The results showed that the highest encapsulation efficiency of 95% was obtained by applying 1% SA and 4% calcium chloride. The microcapsules provided good, controlled release and UV resistance, and could be stored for a long time. The greenhouse experiment revealed that the T. asperellum microcapsules had a maximal biocontrol efficiency of 76% against cucumber powdery mildew. In summary, embedding T. asperellum in microcapsules is a promising technique to improve the survivability of T. asperellum conidia. The T. asperellum microcapsules exerted significant biocontrol efficiency against cucumber powdery mildew. IMPORTANCE Trichoderma asperellum is widely found in plant roots and soil and has been used for the biocontrol of various plant pathogens; however, the control efficiency of T. asperellum is usually unstable in field trials. To improve the control efficiency of T. asperellum, in the present study, T. asperellum microcapsules were prepared using sodium alginate as wall material to reduce the effects of temperature, UV irradiation, and other environmental factors on its activity, and to significantly improve its biocontrol efficiency on cucumber powdery mildew. Microcapsules can prolong the shelf life of microbial pesticides. This study provides a new way to prepare a biocontrol agent against cucumber powdery mildew with high efficiency.
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Affiliation(s)
- Qi Qi
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin, People’s Republic of China
| | - Chengcheng Fan
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin, People’s Republic of China
| | - Hongqu Wu
- Hubei Biopesticide Engineering Research Center, Wuhan, Hubei, People’s Republic of China
| | - Lili Sun
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin, People’s Republic of China
| | - Chuanwang Cao
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin, People’s Republic of China
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Zheng L, Ma X, Lang D, Zhang X, Zhou L, Wang L, Zhang X. Encapsulation of Bacillus pumilus G5 from polyvinyl alcohol‑sodium alginate (PVA-SA) and its implications in improving plant growth and soil fertility under drought and salt soil conditions. Int J Biol Macromol 2022; 209:231-243. [PMID: 35395281 DOI: 10.1016/j.ijbiomac.2022.04.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/31/2022] [Accepted: 04/03/2022] [Indexed: 11/17/2022]
Abstract
Drought and salt stresses adversely affect the growth and yield of plants in agricultural production. Bacillus pumilus, an important plant growth-promoting bacterium, play a significant role in improving plant tolerance to abiotic stresses. In this study, B. pumilus G5 were immobilized in polyvinyl alcohol‑sodium alginate (PVA-SA) microbeads and then applied on the Pharbitis nil under drought and salt stresses by pot experiment. Orthogonal array experiments showed that the optimal immobilization conditions of PVA-SA immobilized G5 microbeads were adsorbent 6.0%, PVA: SA 1:1 (3.0%), CaCl2 4.0%, and bacterium: embedding agent (PVA-SA) 3:4; And the G5 microbeads produced at the optimal condition exhibited better cultivable bacteria count, encapsulation rate, expansion rate and mechanical strength. Pot experiment showed that G5 microbeads significantly increased the length and diameter of root and stem, and dry weight of P. nil during experimental stage under drought and salt stress. G5 microbeads also increased the total cultivable bacteria population, the activities of invertase (INV), urease (URE), phosphatase (PHO) and catalase (CAT), and the contents of available nitrogen (AN) and available phosphorus (AP) in the rhizosphere soil of P. nil. Therefore, our study obtained the optimal process of G5 microbeads, and confirmed its effect on improved plant growth and soil chemical and biological properties of P. nil. Thus it can be used as sustainable tool for eco-friendly bio-inoculants at salinity soil within arid and semi-arid areas.
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Affiliation(s)
- Lihao Zheng
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Xin Ma
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Duoyong Lang
- Laboratory Animal Center, Ningxia Medical University, Yinchuan 750004, China
| | - Xiaojia Zhang
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Li Zhou
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Lanmeng Wang
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Xinhui Zhang
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China; Ningxia Engineering and Technology Research Center of Regional Characterizistic Traditional Chinese Medicine, Ningxia Collaborative Innovation Center of Regional Characterizistic Traditional Chinese Medicine, Key Laboratory of Ningxia Minority Medicine Modernization, Ministry of Education, Yinchuan 750004, China.
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Dong J, He Y, Zhang J, Wu Z. Tuning alginate-bentonite microcapsule size and structure for the regulated release of P. putida Rs-198. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2021.03.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wang X, Tang D, Wang W. Characterization of Pseudomonas protegens SN15-2 microcapsule encapsulated with oxidized alginate and starch. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1760270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Xiaobing Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Danyan Tang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Wei Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
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Cesari A, Loureiro MV, Vale M, Yslas EI, Dardanelli M, Marques AC. Polycaprolactone microcapsules containing citric acid and naringin for plant growth and sustainable agriculture: physico-chemical properties and release behavior. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 703:135548. [PMID: 31767319 DOI: 10.1016/j.scitotenv.2019.135548] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 11/13/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
Plant growth promoting rhizobacteria (PGPR) is an alternative to chemical fertilizers for sustainable, environment friendly agriculture. There is a need to develop strategies to potentiate the interaction between rhizobacteria and plants. Flavonoids and organic acids (components of root exudates) play specific beneficial roles as carbon sources and signal molecules in the plant - rhizobacteria interactions. The goal of this work is to encapsulate signal molecules, namely citric acid and naringin, an organic acid and a flavonoid, respectively, by a biodegradable polymer, polycaprolactone (PCL), in order to maintain the stability and activity of those signal molecules and enable their slow or controlled release over a selected period of time, according to the needs of the plants. This approach is expected to potentiate food crops, namely peanut crop, in adverse environmental conditions (water deficit), by promoting the beneficial interaction between the peanut plant (A. hypogaea) and rhizobacteria. The microcapsules (MCs) are obtained by an emulsion process combined with solvent evaporation technique and are characterized by scanning electron microscopy, thermogravimetry and Fourier transformed infrared spectroscopy. The kinetics of in vitro release of encapsulated molecules, in a period where the uptake of the compound in plants can occur, is studied. The encapsulation synthesis parameters that lead to the best encapsulation process yield and efficiency, as well as to the best final performance in terms of release, are identified. The effect of pH and molecular weight of PCL is found to mediate the release properties of the molecules for different types of soil. PCL 45000 Mw dissolved at 16% in dichloromethane leads to an encapsulation efficiency of 75% and the resulting MCs containing naringin exhibit a slow release profile for 30 days, unmodified by pH, enabling their use in soils of different characteristics. This research makes possible the manufacturing of smart materials for sustainable agriculture practices.
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Affiliation(s)
- Adriana Cesari
- INBIAS, Instituto de Biotecnología Ambiental y Salud, CONICET, Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Ruta Nacional 36, Km 601, Córdoba, Argentina
| | - Mónica V Loureiro
- CERENA, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Mário Vale
- CERENA, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - E Inés Yslas
- IITEMA, Instituto de Investigaciones en Tecnolgías Energéticas y Materiales Avanzados, CONICET, Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Ruta Nacional 36, Km 601, Córdoba, Argentina
| | - Marta Dardanelli
- INBIAS, Instituto de Biotecnología Ambiental y Salud, CONICET, Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Ruta Nacional 36, Km 601, Córdoba, Argentina
| | - Ana C Marques
- CERENA, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal.
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Wu Z, Li X, Liu X, Dong J, Fan D, Xu X, He Y. Membrane shell permeability of Rs-198 microcapsules and their ability for growth promoting bioactivity compound releasing. RSC Adv 2020. [DOI: 10.1039/c9ra06935f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Microencapsulation of bacteria is an alternative technology to enhance viability during processing and application.
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Affiliation(s)
- Zhansheng Wu
- School of Environmental and Chemical Engineering
- Xi'an Polytechnic University
- Xi'an 710048
- P. R. China
- School of Chemistry and Chemical Engineering
| | - Xuan Li
- School of Chemistry and Chemical Engineering
- Shihezi University
- Shihezi 832003
- P. R. China
| | - Xiaochen Liu
- School of Environmental and Chemical Engineering
- Xi'an Polytechnic University
- Xi'an 710048
- P. R. China
| | - Jiawei Dong
- School of Chemistry and Chemical Engineering
- Shihezi University
- Shihezi 832003
- P. R. China
| | - Daidi Fan
- School of Environmental and Chemical Engineering
- Xi'an Polytechnic University
- Xi'an 710048
- P. R. China
- Department of Chemical Engineering
| | - Xiaolin Xu
- School of Chemistry and Chemical Engineering
- Shihezi University
- Shihezi 832003
- P. R. China
| | - Yanhui He
- School of Chemistry and Chemical Engineering
- Shihezi University
- Shihezi 832003
- P. R. China
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Yang D, Wu W, Wang S. Biocompatibility and degradability of alginate-poly- L-arginine microcapsules prepared by high-voltage electrostatic process. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2017.1417291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Dayun Yang
- Fujian Key Laboratory for Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, Fujian, China
| | - Wenguo Wu
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, Fujian, China
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen, Fujian, China
| | - Shibin Wang
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, Fujian, China
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen, Fujian, China
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Bittencourt LLDA, Silva KA, de Sousa VP, Fontes-Sant'Ana GC, Rocha-Leão MH. Blueberry Residue Encapsulation by Ionotropic Gelation. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2018; 73:278-286. [PMID: 30076506 DOI: 10.1007/s11130-018-0685-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
In the processing of fruits such as blueberry (Vaccinium sp), that has high levels of phenolic acid, the food industry produces tons of organic waste that causes harm to the environment. Encapsulation is a technique used to take advantage of these wastes. Several methods are used to encapsulate substances, among them ionotropic gelation proves to be a simple, precise, efficient and economical method for obtaining particles with encapsulated bioactives. In this manner, the aim of this study was to test sodium alginate as wall material to encapsulate blueberry residue by ionotropic gelation. The microbeads were characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD), total phenolic compounds, antioxidant capacity and in vitro dissolution. The results showed that the microbeads had surface invagination; retention of 67.01% of the phenolic compounds after encapsulation and 68.2%, phenolic release 120 min after in vitro dissolution. The results suggest that the tested matrix was suitable for encapsulation. The produced microbeads are promising for applications in food products, once the phenolic compounds present in the blueberry residues were maintained after encapsulation.
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Affiliation(s)
| | - Kelly Alencar Silva
- Escola de Química, Centro de Tecnologia, Universidade Federal do Rio de Janeiro, Bloco E / 103 - Ilha do Fundão, Rio de Janeiro, RJ, 21941-590, Brazil
| | - Valéria Pereira de Sousa
- Faculdade de Farmácia, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Bloco K Sala 050 - Ilha do Fundão, Rio de Janeiro, RJ, 21941-590, Brazil
| | - Gizele Cardoso Fontes-Sant'Ana
- Instituto de Química, Departamento de Tecnologia de Processos Bioquímicos, Universidade do Estado do Rio de Janeiro, R. São Francisco Xavier, 524 - Maracanã, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Maria Helena Rocha-Leão
- Escola de Química, Centro de Tecnologia, Universidade Federal do Rio de Janeiro, Bloco E / 103 - Ilha do Fundão, Rio de Janeiro, RJ, 21941-590, Brazil
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Liffourrena AS, Lucchesi GI. Alginate-perlite encapsulated Pseudomonas putida A (ATCC 12633) cells: Preparation, characterization and potential use as plant inoculants. J Biotechnol 2018; 278:28-33. [PMID: 29723546 DOI: 10.1016/j.jbiotec.2018.04.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 04/19/2018] [Accepted: 04/29/2018] [Indexed: 10/17/2022]
Abstract
Microbial immobilization can be used to prepare encapsulated inoculants. Here, we characterize and describe the preparation of Ca-alginate-perlite microbeads loaded with cells of plant growth-promoting Pseudomonas putida A (ATCC 12633), for their future application as agricultural inoculants. The microbeads were prepared by dropwise addition of a CaCl2-paraffin emulsion mixture to an emulsion containing alginate 2% (w/v), perlite 0.1-0.4% (w/v) and bacterial suspension in 0.9% NaCl (1010 CFU/mL). For all perlite concentrations used, microbead size was 90-120 μm, the trapped population was 108 CFU/g microbeads and the increase in mechanical stability was proportional to perlite concentration. Microbeads containing 0.4% (w/v) perlite were able to release bacteria into the medium after 30 days of incubation. When we evaluated how P. putida A (ATCC 12633) entrapped in Ca-alginate-perlite (0.4% (w/v)) microbeads colonized the Arabidopsis thaliana rhizosphere, an increase in colonization over time was detected (from an initial 2.1 × 104 to 9.2 × 105 CFU/g soil after 21 days). With this treatment, growth promotion of A. thaliana occurred with an increase in the amount of proteins, and in root and leaf biomass. It was concluded that the microbeads could be applied as possible inoculants, since they provide protection and a controlled release of microorganisms into the rhizosphere.
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Affiliation(s)
- Andrés S Liffourrena
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, CPX5804BYA, Río Cuarto, Córdoba, Argentina
| | - Gloria I Lucchesi
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, CPX5804BYA, Río Cuarto, Córdoba, Argentina.
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Shu B, Wu S, Dong L, Wang Q, Liu Q. Microfluidic Synthesis of Ca-Alginate Microcapsules for Self-Healing of Bituminous Binder. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E630. [PMID: 29671835 PMCID: PMC5951514 DOI: 10.3390/ma11040630] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 04/16/2018] [Accepted: 04/17/2018] [Indexed: 11/23/2022]
Abstract
This work aims to develop an original alginate micro-emulsion combining with droplets microfluidic method to produce multinuclear Ca-alginate microcapsules containing rejuvenator for the self-healing of bituminous binder. The sizes of the Ca-alginate microcapsules could be easily controlled by tuning flow rates of the continuous and dispersed phases. The addition of a surfactant Tween80 not only improved the stability of the emulsion, but it also effectively reduced the size of the microcapsules. Size predictive mathematical model of the microcapsules was proposed through the analysis of fluid force. Optical microscope and remote Fourier infrared test confirmed the multinuclear structure of Ca-alginate microcapsules. Thermogravimetric analysis showed that the microcapsules coated with nearly 40% rejuvenator and they remained intact during the preparation of bitumen specimen at 135 °C. Micro self-healing process of bituminous binder with multinuclear Ca-alginate microcapsules containing rejuvenator was monitored and showed enhanced self-healing performance. Tensile stress-recovery test revealed that the recovery rate increased by 32.08% (in the case of 5% microcapsules), which meant that the Ca-alginate microcapsules containing rejuvenator could effectively enhance the self-healing property of bituminous binder.
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Affiliation(s)
- Benan Shu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
| | - Shaopeng Wu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
| | - Lijie Dong
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
| | - Qing Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
| | - Quantao Liu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
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