Biodegradable gum: A green source for silver nanoparticles

Khan, Tariq Jamal; Jalal, Husna; Karam, Kashmala; Khan, Mubarak Ali

doi:10.1016/b978-0-12-824508-8.00026-5

Cited by 6 publications

(1 citation statement)

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“…Many studies state that AgNPs can disrupt the cell wall; increase intercellular ROS production, oxidative stress, and photocatalytic activity; and inhibit cell division and replication by binding to cell walls, the S-H group of proteins, and the N7 atom of guanin [6,7]. Green synthesis of silver nanoparticles attained worldwide attention due to their minimum use of resources and energy as well as for their biocompatibility and environmental safety [8,9]. The growing use of AgNPs inevitably increases the chance of releasing toxic Ag + into the environment.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Action of Biosynthesized Silver Nanoparticles and Culture Supernatant of Bacillus amyloliquefacience against the Soft Rot Pathogen Dickeya dadantii

Hossain

Luo²,

Ali

et al. 2023

Plants

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Nanomaterials are increasingly being used for crop growth, especially as a new paradigm for plant disease management. Among the other nanomaterials, silver nanoparticles (AgNPs) draw a great deal of attention because of their unique features and multiple usages. Rapid expansion in nanotechnology and utilization of AgNPs in a large range of areas resulted in the substantial release of these nanoparticles into the soil and water environment, causing concern for the safety of ecosystems and phytosanitary. In an attempt to find an effective control measure for sweet potato soft rot disease, the pathogen Dickeya dadantii was exposed to AgNPs, the cell-free culture supernatant (CFCS) of Bacillus amyloliquefaciens alone, and both in combination. AgNPs were synthesized using CFCS of Bacillus amyloliquefaciens strain A3. The green synthesized AgNPs exhibited a characteristic surface plasmon resonance peak at 410–420 nm. Electron microscopy and X-ray diffraction spectroscopy determined the nanocrystalline nature and 20–100 nm diameters of AgNPs. Release of metal Ag+ ion from biosynthesized AgNPs increases with time. AgNPs and CFCS of B. amyloliquefaciens alone exhibited antibacterial activity against the growth, biofilm formation, swimming motility, and virulence of strain A3. The antibacterial activities elevated with the elevation in AgNPs and CFCS concentration. Similar antibacterial activities against D. dadantii were obtained with AgNPs at 50 µg·mL−1, 50% CFCS alone, and the combination of AgNPs at 12 µg·mL−1 and 12% CFCS of B. amyloliquefaciens. In planta experiments indicated that all the treatments reduced D. dadantii infection and increased plant growth. These findings suggest that AgNPs along with CFCS of B. amyloliquefaciens can be applied to minimize this bacterial disease by controlling pathogen-contaminated sweet potato tuber with minimum Ag nano-pollutant in the environment.

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