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Polli AD, Oliveira Junior VAD, Ribeiro MADS, Polonio JC, Rosini B, Oliveira JADS, Bini RD, Golias HC, Fávaro-Polonio CZ, Orlandelli RC, Vicentini VEP, Cotica LF, Peralta RM, Pamphile JA, Azevedo JL. Synthesis, characterization, and reusability of novel nanobiocomposite of endophytic fungus Aspergillus flavus and magnetic nanoparticles (Fe 3O 4) with dye bioremediation potential. CHEMOSPHERE 2023; 340:139956. [PMID: 37640209 DOI: 10.1016/j.chemosphere.2023.139956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 08/14/2023] [Accepted: 08/22/2023] [Indexed: 08/31/2023]
Abstract
The incorrect disposal of textile dyes, such as Reactive Black 5 (RB5), causes several problems for living beings and the quality of the environment. Nanobiocomposites (NBC) produced from endophytic fungi (potentially remediation dyes-agents) and magnetic nanoparticles have high biotechnological potential due to their superparamagnetic behavior, which would allow their recovery through the magnetic field after the bioremediation process. This work aimed to obtain a new nanobiocomposite from the interaction of magnetite nanoparticles (Fe3O4) with the endophyte Aspergillus flavus (Af-CL-7) to evaluate its bioremediation capacity and to reduce the toxicity of RB5 and its reuse. Before obtaining the NBC, Af-CL-7 showed discoloration of RB5 and it was tolerant to all tested concentrations of this dye. The discovery of the nanobiocomposite textile dye bioremediator product presents a significant environmental advantage by addressing the issue of water pollution caused by textile dyes. The NBC called Af-Fe3O4 was successfully obtained with the magnetized endophyte, and their magnetic properties were verified by VSM analysis and by action of magnetic fields generated by Nd-Fe-B magnets SEM analyzes showed that the nanoparticles did not cause any damage to the hypha morphology, and TEM analyzes confirmed the presence of nanoparticles in the fungus wall and also inside the cell. The NBC Af-Fe3O4 and Af-CL-7 showed, respectively, 96.1% and 92.2% of RB5 discoloration in the first use, 91.1% e 86.2% of discoloration in the validation test, and 89.0% in NBC reuse. In the toxicological bioassay with Lactuca sativa seeds, NBC showed a positive reduction in the toxicity of RB5 after treatment, allowing the hypocotyl growth to be statistically similar to the control with water. Thus, we highlight the promising obtaining process of NBC that could be applied in bioremediation of contaminated waters, wherein the industrial economic cost will depend on the fermentation efficiency, biomass production and nanoparticle synthesis.
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Affiliation(s)
- Andressa Domingos Polli
- Laboratory of Microbial Biotechnology. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 87020-900, Maringá, Paraná, Brazil
| | - Verci Alves de Oliveira Junior
- Laboratory of Microbial Biotechnology. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 87020-900, Maringá, Paraná, Brazil
| | - Marcos Alessandro Dos Santos Ribeiro
- Laboratory of Microbial Biotechnology. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 87020-900, Maringá, Paraná, Brazil
| | - Julio Cesar Polonio
- Laboratory of Microbial Biotechnology. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 87020-900, Maringá, Paraná, Brazil.
| | - Bianca Rosini
- Laboratory of Microbial Biotechnology. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 87020-900, Maringá, Paraná, Brazil
| | - João Arthur Dos Santos Oliveira
- Laboratory of Microbial Biotechnology. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 87020-900, Maringá, Paraná, Brazil
| | | | - Halison Correia Golias
- Academic Department of Humanities, Federal Technological University of Paraná, Apucarana, Paraná, Brazil
| | - Cintia Zani Fávaro-Polonio
- Laboratory of Microbial Biotechnology. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 87020-900, Maringá, Paraná, Brazil
| | - Ravely Casarotti Orlandelli
- Laboratory of Microbial Biotechnology. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 87020-900, Maringá, Paraná, Brazil
| | | | | | | | - João Alencar Pamphile
- Laboratory of Microbial Biotechnology. Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 87020-900, Maringá, Paraná, Brazil
| | - João Lúcio Azevedo
- Department of Genetics, College of Agriculture "Luiz de Queiroz", University of São Paulo, 13418-900, Piracicaba, São Paulo, Brazil
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Rashad YM, Abdalla SA, Shehata AS. Aspergillus flavus YRB2 from Thymelaea hirsuta (L.) Endl., a non-aflatoxigenic endophyte with ability to overexpress defense-related genes against Fusarium root rot of maize. BMC Microbiol 2022; 22:229. [PMID: 36175855 PMCID: PMC9524039 DOI: 10.1186/s12866-022-02651-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 09/22/2022] [Indexed: 11/10/2022] Open
Abstract
Fusarium root rot, caused by Fusarium solani (Mart.) Sacc., represents one of the most damaging diseases of maize affecting plant growth and yield. In this study, the antagonistic potential of a non-aflatoxigenic endophytic Aspergillus flavus YRB2, isolated from Thymelaea hirsuta (L.) Endl., was tested against F. solani in vitro. In addition, its biocontrol activity against Fusarium root rot of maize was evaluated under greenhouse conditions. Its impacts on plant molecular, pathological, physiological, and growth levels were also studied. Results obtained revealed a potent antagonistic behavior for A. flavus YRB2 against F. solani in vitro, recording 80% growth inhibition. Seventeen secondary metabolites were detected in the n-hexane extract of A. flavus YRB2 filtered culture broth using GC-MS analysis. Among them, various antifungal secondary metabolites were produced, namely palmitic acid, α-linolenic acid, stearic acid, 2, 4-di-tert-butylphenol, diisobutyl phthalate, and heneicosane. In contrast, HPLC analysis showed that no aflatoxins (B1, B2, G1, and G2) were detected. Under greenhouse conditions, colonization of maize plants with A. flavus YRB2 exhibited a potential biocontrol activity against Fusarium root rot, recording 73.4% reduction in the disease severity. Triggering of transcriptional expression level of the defense-related genes JERF3 (7.2-fold), CHI II (8-fold), and POD (9.1-fold) was reported, indicating the inducing effect on the plant immunity. In addition, an increment in the antioxidant enzymes POD and PPO, and the total phenolic content in maize roots was also observed in response to this treatment. Moreover, a growth-promoting effect was also observed for colonization of maize plants with A. flavus YRB2. Based on the obtained data, we can conclude that A. flavus YRB2 may represent a promising biocontrol and growth-promoting agent for maize plants against Fusarium root rot. Nevertheless, field evaluation is highly requested before the use recommendation.
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Affiliation(s)
- Younes M Rashad
- Plant Protection and Biomolecular Diagnosis Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, 21934, Egypt.
| | - Sara A Abdalla
- Plant Protection and Biomolecular Diagnosis Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, 21934, Egypt
| | - Ahmed S Shehata
- Environment and Natural Materials Research Institute (ENMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, 21934, Egypt
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Lacerda ÍCDS, Polonio JC, Golias HC. Endophytic Fungi as a Source of Antiviral Compounds - A Review. Chem Biodivers 2022; 19:e202100971. [PMID: 35426966 DOI: 10.1002/cbdv.202100971] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 04/14/2022] [Indexed: 11/05/2022]
Abstract
Endophytic fungi are a rich source of secondary metabolites. The interactions between endophytes and their hosts lead to the production of several bioactive substances grouped into different classes, each having a wide variety of effects against various pathogens. The metabolites obtained from these organisms include steroids, alkaloids, phenols, isocoumarins, xanthones, quinones, and terpenoids, among others. These substances are known to have antibiotic, antiparasitic, antifungal, and antiviral effects. This review summarizes secondary metabolites with antiviral effects produced by endophytic fungi and highlights the importance of research in developing novel antiviral substances. We demonstrate that endophytic fungi are a rich source of secondary metabolites that combat pathologies caused by viruses. Optimizing practical and biotechnological screening tools for the research of these metabolites will provide promising drugs to combat these infections.
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Affiliation(s)
| | - Júlio Cesar Polonio
- Department of Cell Biology, Genetics and Biotechnology, State University of Maringá (UEM), Brazil
| | - Halison Correia Golias
- Department of Humanities, Microbiology Laboratory, Federal Technological University of Paraná (UTFPR), Brazil
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