Direct synthesis of lemongrass (Cymbopogon citratus L.) essential oil-silver nanoparticles (EO-AgNPs) as biopesticides and application for lichen inhibition on stones

Riyanto, Riyanto; Mulwandari, Meike; Asysyafiiyah, Luthfiah; Sirajuddin, Melisa  I.; Cahyandaru, Nahar

doi:10.1016/j.heliyon.2022.e09701

Cited by 11 publications

(5 citation statements)

References 43 publications

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“…UV-vis spectroscopy showed broad absorption peak of AgNPs at 455 nm compared to 363 nm of the C. citratus aqueous extract. Similar to these findings, multiple studies reported the size of C. citratus AgNPs at 435 nm [32,33], 469 nm [26], 440 nm [34], and 450 nm [35]. These results confirmed the formation of AgNPs due to the SPR nature of AgNPs, which is directly related to their size, shape, concentration, agglomeration state, and refractive index.…”

Section: Discussionsupporting

confidence: 83%

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Biological Activity of Biosynthesized Silver Nanoaggregates Prepared from the Aqueous Extract of Cymbopogon citratus against Candida spp.

Al-Otibi,

Albulayhid,

Alharbi

et al. 2023

Nanomaterials

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Cymbopogon citratus is commonly used in folk medicine for the treatment of nervous and gastrointestinal disturbances and other medical issues because of its potent antioxidant capacity. The current study evaluated the anti-candida effects of silver nanoparticles (AgNPs) synthesized from an aqueous extract of C. citratus against different Candida spp. The aqueous extract was prepared from the fresh leaves of C. citratus. The silver nanoparticles (AgNPs) were prepared and validated by UV spectroscopy, Fourier-transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), and zeta size analysis. C. albicans, C. krusei, C. parapsilosis, C. tropicalis, C. famata, C. rhodotorula, and C. glabrata were used in the antifungal assay. Microscopical imaging were used to investigate the different morphological changes induced by treatment. FTIR spectrum confirmed the existence of various functional groups of biomolecules capping the nanoparticles. The average particle size of synthesized AgNPs was 100.6 nm by zeta-sizer and 0.012 to 0.059 mm by TEM. In the antifungal assay, AgNPs aggregates induced significant inhibition of the growth of all species (p < 0.05) compared to the control and the biofilm maturation in C. famata and C. albicans. These considerable antifungal activities might lead to the development of appropriate alternative remedy for the treatment of fungal infections.

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Section: Discussionsupporting

confidence: 83%

“…A previous study used the disc-diffusion method and showed C. citratus EO AgNPs had a ZOI dimeter of 73.64 43.54 nm compared to C. albicans [52]. Another study showed that C. citratus EO AgNPs induced a ZOI diameter of 20.3 mm for lichens on the stone surface [34].…”

Section: Discussionmentioning

confidence: 99%

Biological Activity of Biosynthesized Silver Nanoaggregates Prepared from the Aqueous Extract of Cymbopogon citratus against Candida spp.

Al-Otibi,

Albulayhid,

Alharbi

et al. 2023

Nanomaterials

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“…The absorbance of the nanoparticles was evaluated using a double-beam UV-visible spectrophotometer, and after 24 h, there was no change, indicating that the reduction of the silver nanoparticles was complete. Dissolving silver nanoparticles in water caused their surface plasmon resonance to become excited, altering the color of the nanoparticles from yellow to greyish brown [17]. The utilization of UV-Vis spectroscopy is a crucial method for confirming the establishment and endurance of AgNPs within aqueous solutions [18].…”

Section: Uv-visible Spectroscopymentioning

confidence: 99%

Terminalia chebula-Assisted Silver Nanoparticles: Biological Potential, Synthesis, Characterization, and Ecotoxicity

et al. 2023

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In the current research, an aqueous extract of Terminalia chebula fruit was used to produce silver nanoparticles (Ag NPs) in a sustainable manner. UV-visible spectrophotometry, transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were used to characterize the synthesized nanoparticles. Synthesized Ag NPs were detected since their greatest absorption peak was seen at 460 nm. The synthesized Ag NPs were spherical and had an average size of about 50 nm, with agglomerated structures, as shown via SEM and TEM analyses. The biological activities of the synthesized Ag NPs were evaluated in terms of their antibacterial and antioxidant properties, as well as protein leakage and time-kill kinetics assays. The results suggest that the green synthesized Ag NPs possess significant antibacterial and antioxidant activities, making them a promising candidate for therapeutic applications. Furthermore, the study also evaluated the potential toxicological effects of the Ag NPs using zebrafish embryos as a model organism. The findings indicate that the synthesized Ag NPs did not induce any significant toxic effects on zebrafish embryos, further supporting their potential as therapeutic agents. In conclusion, the environmentally friendly production of Ag NPs using the extract from T. chebula is a promising strategy for discovering novel therapeutic agents with prospective uses in biomedicine.

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“…Formulations for dilution in water can be sold as Emulsifiable Concentrate (EC), in the form of emulsions with small amounts of water, giving them a milky appearance [36,37], or as Suspension Concentrate (SC), which are inert and stable and need to be shaken before application [38], or as Soluble Powder (SP) [39], or as Wettable Powder (WP), which is very similar to SP but does not dissolve in water when applied, requiring agitation during application [40], or as Microencapsulated, which is a specific characteristic of WP as it is not in direct contact with water but encapsulated for continuous and controlled release over time during application [41] . Formulations for dilution in other solvents are marketed in high concentrations and need to be diluted in oils or organic solvents [42]. Formulations for direct application are provided in the form of Dry Powder (DP), which are essentially applied in mixture with inert powders such as talc and clay when water spraying can damage the area or agricultural products [43], in the form of Granules (GR), which are similar to dry powder but consist of larger granular solids (ranging from 0.3 to 0.6 mm) for slower and continuous release of the biodefensive [44], or in the form of Baits, which are composed of even larger granular solids than the GR formulations and are intended to be consumed by pests [45].…”

Section: Formulation Of Agricultural Biodefensivesmentioning

confidence: 99%

Biosurfactants: Promising Biomolecules for Agricultural Applications

Silva,

Medeiros,

Converti

et al. 2023

Preprint

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Population growth and the need for increased agricultural productivity pose a global problem. Therefore, the development of green compounds to ensure agricultural sustainability becomes an urgent necessity. Surfactant compounds hold significant commercial importance due to their diverse industrial uses. However, the synthetic origin of these agents limits their commercial application due to their toxicity. As a result, extensive research has focused on the production of microbial-originated green surfactants, known as biosurfactants, over the past fifteen years. These biomolecules not only offer a green alternative for agriculture but also exhibit reduced toxicity and excellent stability under specific environmental conditions. Biosurfactants can lower surface tension more effectively than synthetic surfactants. With properties such as detergency and foam formation, biosurfactants are suitable for various agricultural applications, particularly in pesticide and agrochemical formulations. They can function as biopesticides to manage pests, pathogens, phytopathogenic fungi, and weeds due to their antimicrobial activity. Moreover, plants can benefit from biosurfactant molecules and the microorganisms as nutrients. They can also aid efficiently in the distribution of micronutrients and metals in the soil. They also stimulate plant immunity and are utilized for soil hydrophilization to ensure proper moisture levels and uniform fertilizer distribution. This review aims to provide valuable insights into the role and properties of biosurfactants as agricultural adjuvants, fostering the development of sustainable formulations to replace chemical surfactants used in pesticides.

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Direct synthesis of lemongrass (Cymbopogon citratus L.) essential oil-silver nanoparticles (EO-AgNPs) as biopesticides and application for lichen inhibition on stones

Cited by 11 publications

References 43 publications

Biological Activity of Biosynthesized Silver Nanoaggregates Prepared from the Aqueous Extract of Cymbopogon citratus against Candida spp.

Biological Activity of Biosynthesized Silver Nanoaggregates Prepared from the Aqueous Extract of Cymbopogon citratus against Candida spp.

Terminalia chebula-Assisted Silver Nanoparticles: Biological Potential, Synthesis, Characterization, and Ecotoxicity

Biosurfactants: Promising Biomolecules for Agricultural Applications

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