Applications of Silver Nanoparticles in Plant Protection

Gupta, Nomita; Upadhyaya, Chandrama Prakash; Singh, Amar Pal; Abd‐Elsalam, Kamel A.; Prasad, Ram

doi:10.1007/978-3-319-91161-8_9

Cited by 60 publications

(29 citation statements)

References 76 publications

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“…Preliminary we tested the impact of AgNPs on plant growth promoting bacteria (PGPBs), including Bacillus amyloliquefaciens strain D16 isolated from rice and Paneabacillus polymyxa strain SX3 from cotton in our laboratory, and hence, we did not observe a significant effect on PGPBs upon exposure the concentration of 5–20 μg/mL (data not shown). Nonetheless, other studies demonstrated that PGPBs are inhibited upon exposure to AgNPs but the toxic effects above a certain concentration (mostly ≥ 100ppm) (Gupta et al, 2018; Mahawar and Prasanna, 2018). However, extrapolation of our observations to more general cases is limited because of in vitro evaluation.…”

Section: Discussionmentioning

confidence: 98%

“…The use of biogenic AgNPs in the protection of crop diseases offers an excellent promise in insect and pathogens management as an alternative to chemically produced pesticides. AgNPs are remarkably effective against phytopathogens with low toxicity and lead to broad spectrum of applicability such as in pesticidal, antiviral, antifungal, antibacterial as well as nematicidal activities (Gupta et al, 2018). It opens up a new tool for disease management, rapid disease detection and reducing nutrient losses in fertilization by an optimized nutrient management.…”

Section: Discussionmentioning

confidence: 99%

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Biogenic Synthesis of Silver Nanoparticles Using Phyllanthus emblica Fruit Extract and Its Inhibitory Action Against the Pathogen Acidovorax oryzae Strain RS-2 of Rice Bacterial Brown Stripe

et al. 2019

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Biogenic synthesis of silver nanoparticles (AgNPs) using plants has become a promising substitute to the conventional chemical synthesis method. In this study, we report low-cost, green synthesis of AgNPs using fresh fruit extract of Phyllanthus emblica . The biosynthesized AgNPs was confirmed and characterized by analysis of spectroscopy profile of the UV-visible and Energy dispersive spectrophotometer, Fourier transform infrared, X-ray diffraction pattern, and electron microscopy images examination. UV-visible spectra showed a surface resonance peak of 430 nm corresponding to the formation of AgNPs, and FTIR spectra confirmed the involvement of biological molecules in AgNPs synthesis. In spherical AgNPs, the particle size ranged from 19.8 to 92.8 nm and the average diameter was 39 nm. Synthesized nanoparticles at 20 μg/ml showed remarkable antimicrobial activity in vitro against the pathogen Acidovorax oryzae strain RS-2 of rice bacterial brown stripe, while 62.41% reduction in OD 600 value was observed compared to the control. Moreover, the inhibitory efficiency of AgNPs increased with the increase of incubation time. Furthermore, AgNPs not only disturbed biofilm formation and swarming ability but also increased the secretion of effector Hcp in strain RS-2, resulting from damage to the cell membrane, which was substantiated by TEM images and live/dead cell staining result. Overall, this study suggested that AgNPs can be an attractive and eco-friendly candidate to control rice bacterial disease.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Biogenic Synthesis of Silver Nanoparticles Using Phyllanthus emblica Fruit Extract and Its Inhibitory Action Against the Pathogen Acidovorax oryzae Strain RS-2 of Rice Bacterial Brown Stripe

et al. 2019

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“…In fact, AgNPs at 10, 20, 30 and 40 µg/mL caused an 18%, 49%, 65% and 88% reduction, respectively, in mycelial diameter. Similarly, previous studies have shown that AgNPs can be used as an antifungal agent to prevent plants from fungal infection [9,10,[39][40][41][42][43]. The fungal cell wall is a flexible structure that performs several functions in determining the shape of the cell.…”

Section: Antifungal Activity Of Agnpsmentioning

confidence: 99%

“…It has been instrumental in suppressing many of the fungal pathogens that attack the plants, causing them huge loss. For example, silver nanoparticles (AgNPs) had a significant effect in suppressing many of the air, seed and soil-borne fungal plant pathogens [ 9 , 10 ]. AgNP synthesis was documented using various methods including physical, chemical, and biological [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of Silver Nanoparticles Using Onion Endophytic Bacterium and Its Antifungal Activity against Rice Pathogen Magnaporthe oryzae

Ibrahim

Luo²,

et al. 2020

JoF

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Biosynthesis of silver nanoparticles (AgNPs) using endophytic bacteria is a safe alternative to the traditional chemical method. The purpose of this research is to biosynthesize AgNPs using endophytic bacterium Bacillus endophyticus strain H3 isolated from onion. The biosynthesized AgNPs with sizes from 4.17 to 26.9 nm were confirmed and characterized by various physicochemical techniques such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), UV-visible spectroscopy, transmission electron microscopy (TEM) and scanning electron microscopy (SEM) in addition to an energy dispersive spectrum (EDS) profile. The biosynthesized AgNPs at a concentration of 40 μg/mL had a strong antifungal activity against rice blast pathogen Magnaporthe oryzae with an inhibition rate of 88% in mycelial diameter. Moreover, the biosynthesized AgNPs significantly inhibited spore germination and appressorium formation of M. oryzae. Additionally, microscopic observation showed that mycelia morphology was swollen and abnormal when dealing with AgNPs. Overall, the current study revealed that AgNPs could protect rice plants against fungal infections.

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“…Because of their larger surface-to-volume ratio and their crystalline structure, they more effectively trigger biological responses compared to the traditional ionic form of the metals. [29][30][31] Although, in some studies, MNPs proved to be less toxic to mammalian cells than their corresponding ionic forms and to have a prolonged effect as a source of elements in an organism, alongside reduced risk for the environment and non-target organisms, their possible use in large amounts for agricultural purposes is still an open debate. Production costs and regulatory obstacles are also issues that must be resolved.…”

Section: Metal Nanoparticlesmentioning

confidence: 99%

Safe nanotechnologies for increasing the effectiveness of environmentally friendly natural agrochemicals

Vurro

Miguel-Rojas

Pérez‐de‐Luque

2019

Pest Management Science

113

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Natural compounds and living organisms continue to play a limited role in crop protection, and few of them have reached the market, despite their attractiveness and the efforts made in research. Very often these products have negative characteristics compared to synthetic compounds, e.g., higher costs of production, lower effectiveness, lack of persistence, and inability to reach and penetrate the target plant. Conversely, nanotechnologies are having an enormous impact on all human activities, including agriculture, even if the production of some nanomaterials is not environmentally friendly or could have adverse effects on agriculture and the environment. Thus, certain nanomaterials could facilitate the development of formulated natural pesticides, making them more effective and more environmentally friendly. Nanoformulations can improve efficacy, reduce effective doses, and increase shelf‐life and persistence. Such controlled‐release products can improve delivery to the target pest. This review considers certain available nanomaterials and nanotechnologies for use in agriculture, discussing their properties and the feasibility of their use in sustainable crop protection, in particular, in improving the effectiveness of natural bio‐based agrochemicals. © 2019 Society of Chemical Industry

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Applications of Silver Nanoparticles in Plant Protection

Cited by 60 publications

References 76 publications

Biogenic Synthesis of Silver Nanoparticles Using Phyllanthus emblica Fruit Extract and Its Inhibitory Action Against the Pathogen Acidovorax oryzae Strain RS-2 of Rice Bacterial Brown Stripe

Biogenic Synthesis of Silver Nanoparticles Using Phyllanthus emblica Fruit Extract and Its Inhibitory Action Against the Pathogen Acidovorax oryzae Strain RS-2 of Rice Bacterial Brown Stripe

Biosynthesis of Silver Nanoparticles Using Onion Endophytic Bacterium and Its Antifungal Activity against Rice Pathogen Magnaporthe oryzae

Safe nanotechnologies for increasing the effectiveness of environmentally friendly natural agrochemicals

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