Unraveling the photoactive annihilation mechanism of nanostructures as effective green tools for inhibiting the proliferation of the phytopathogenic bacterium<i>Pseudomonas syringae</i>

Casas-Flores, Sergio; Domínguez-Espíndola, Ruth Belinda; Camposeco-Solís, Roberto; Patrón-Soberano, Olga Araceli; Rodríguez-González, Vicente

doi:10.1039/c8na00307f

Cited by 6 publications

(4 citation statements)

References 30 publications

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“…Casas et al, por ejemplo, emplearon materiales 1D funcionalizados con AgNPs de 4 nm en promedio. Se estudio la inactivación de la bacteria P syringae (Casas-Flores et al, 2019), la formación de ampollas y/o vesículas de la membrana externa (OMVs) es un mecanismo de resistencia de las células de P. syringae contra la lisis celular, conducente a la disrupción de la bacteria en 30 min. El mecanismo sinérgico de los nanotubos funcionalizados con 1%wt de AgNPs desafió los mecanismos de defensa de bacterias provocando la muerte celular rápida e irreversible del fitopatógeno, la morfología, fotoquímica y el poder bacteriostático de la plata parecen ser una herramienta promisoria para prevenir el desarrollo de resistencia bacteriana, como se esquematiza en la figura 9.…”

Section: Breve Estado Del Arteunclassified

Potencial de los nanomateriales en la agricultura: retos y oportunidades

Rodríguez-González,

Díaz-Cervantes

2023

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El cambio climático y la evolución de la sociedad exigen una optimización de las prácticas agrícolas y/o nuevas tendencias para lograr una agricultura sostenible. La ciencia de los materiales se erige como una excelente alternativa para coayudar a la agricultura desde la germinación y cultivo hasta la cosecha, incluyendo la distribución-almacenamiento de bienes agrícolas. En el presente trabajo, se revisaron y discutieron estudios recientes novedosos y sustentables que utilizan nanomateriales, para destacar los desafíos y oportunidades de las nanociencias y nanotecnología en una nueva era de la agricultura, generando procesos de sustentabilidad. Los nanomateriales ofrecen una plataforma para el suministro controlado de fertilizantes, la mediación de contaminantes en el agua y el aire, así como para el control de algunos microrganismos fitopatógenos que colonizan cultivos en la agricultura actual. La síntesis de nanomateriales factibles, junto con su evaluación estandarizada a nivel mundial, es importante para obtener una nueva generación de técnicos y científicos en el desarrollo de técnicas emergentes y cambios en la agricultura. La correcta legislación puede obtenerse si se tienen protocolos internacionales para trabajar, es decir, protocolos de síntesis y caracterización de nanomateriales reproducibles a nivel mundial y desarrollados in-situ para obtener resultados reales.

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Section: Breve Estado Del Arteunclassified

Potencial de los nanomateriales en la agricultura: retos y oportunidades

Rodríguez-González,

Díaz-Cervantes

2023

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“…The effectiveness of the photo-eradication will depend to a great extent on microbial growth conditions, susceptibility to ROS, the shape and texture of the nanomaterial and the intrinsic ability to activate the defense J o u r n a l P r e -p r o o f against oxidative stress caused by the light irradiation. This phenomenon can lead to a damage in the organic composition of the microbe derived from the oxidation and reduction reactions in the external wall and the cellular secretions, altering the permeability of the cell membrane [158,159]. Fig.…”

Section: Operational Photocatalytic Mechanism For Eradicationmentioning

confidence: 99%

“…Solar disinfection was established in the 1980s as a practical method for disinfecting drinking water and it is currently known as SODIS technology [157][158][159][160][161][162][163]. The use of H2O2, acidic solutions and photo-Fenton systems, which involves the oxidation of a metal to a higher state (Fe 2+/3+ ), improves the disinfection process due to the densification of oxidative species such as hydroxyls, superoxide and iron species according to the pH value of the system [171,172,173].…”

Section: Solar Disinfection Of Microorganismmentioning

confidence: 99%

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An approach to the photocatalytic mechanism in the TiO2-nanomaterials microorganism interface for the control of infectious processes

Rodríguez-González

Obregón

Patrón-Soberano

et al. 2020

Applied Catalysis B: Environmental

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148

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J o u r n a l P r e -p r o o f 2 Graphical Abstract Highlights  Photoactive TiO2 nanomaterials can solve the actual microbial infectious defies  The microbial cell/TiO2 surface approach is key to get the photo-kill mechanism  Microbial preparation requires a reproducible protocol for proper characterization  Advanced surface characterization techniques can unravel the photo-kill mechanism  Generation of ROS, physical injuries and biocidal features confirm the annihilation J o u r n a l P r e -p r o o f Abstract The approach of this timely review considers the current literature that is focused on the interface nanostructure/cell-wall microorganism to understand the annihilation mechanism. Morphological studies use optical and electronic microscopes to determine the physical damage on the cell-wall and the possible cell lysis that confirms the viability and microorganism death. The key parameters of the tailoring the surface of the photoactive nanostructures such as the metal functionalization with bacteriostatic properties, hydrophilicity, textural porosity, morphology and the formation of heterojunction systems, can achieve the effective eradication of the microorganisms under natural conditions, ranging from practical to applications in environment, agriculture, and so on. However, to our knowledge, a comprehensive review of the microorganism/nanomaterial interface approach has rarely been conducted. The final remarks point the ideal photocatalytic way for the effective prevention/eradication of microorganisms, considering the resistance that the microorganism could develop without the appropriate regulatory aspects for human and ecosystem safety. Introduction and background 1. TiO 2 based materials obtained from TiO 2 and its composites J o u r n a l P r e -p r o o f previous studies have demonstrated that photocatalysis can be considered a promising tool in anticancer therapies, since the photocatalyst can kill cancer cells such as HeLa cells, which cause cervical cancer [7]. The energy absorbed by the photocatalyst comprises the range of ultraviolet and/or visible light, even natural sunlight. When the photocatalyst absorbs light, if the energy of the photons is enough to excite the electrons J o u r n a l P r e -p r o o f 6in the valence band (VB), then they migrate to a higher energy level in the conduction band (CB) of the material, as it is illustrated in Fig. 1. This phenomenon generates the charge carriers known as hole-electron pairs. The photogenerated hole can migrate to the surface of the material and react with water molecules or hydroxyl ions to produce hydroxyl radicals, while the photoexcited electron in the conduction band can react with the adsorbed molecular oxygen to produce superoxide ions [8]. Since the report of Fujishima and Honda about the water splitting process using a TiO2 electrode under UV irradiation, numerous studies have exploited the photoactive properties of this material [9,10]. Several reviews have studied the relationship between the electronic properties of TiO2 with...

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Synthesis and physicochemical characterization of rhamnolipid-stabilized carvacrol-loaded zein nanoparticles for antimicrobial application supported by molecular docking

et al. 2020

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Unraveling the photoactive annihilation mechanism of nanostructures as effective green tools for inhibiting the proliferation of the phytopathogenic bacteriumPseudomonas syringae

Abstract: Effective annihilation in a short time acts in three simultaneous ways, photochemical, mechanical damage of sharp morphology and biocidal silver properties that made difficult the microbial resistance of Pseudomonas syringae.

Cited by 6 publications

References 30 publications

Potencial de los nanomateriales en la agricultura: retos y oportunidades

Potencial de los nanomateriales en la agricultura: retos y oportunidades

An approach to the photocatalytic mechanism in the TiO2-nanomaterials microorganism interface for the control of infectious processes

Synthesis and physicochemical characterization of rhamnolipid-stabilized carvacrol-loaded zein nanoparticles for antimicrobial application supported by molecular docking

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