BIOSYNTHESIS OF SILVER NANOPARTICLES USING CYNARA SCOLYMUS, LAVANDULA ANGUSTIFOLIA, ALKANNA TINCTORIA AND ITS ANTIMICROBIAL ACTIVITIES—A COMPARATIVE STUDY
BIOSYNTHESIS OF SILVER NANOPARTICLES USING CYNARA SCOLYMUS, LAVANDULA ANGUSTIFOLIA, ALKANNA TINCTORIA AND ITS ANTIMICROBIAL ACTIVITIES—A COMPARATIVE STUDY
Javairia Mehboob1, Syeda Hafsa Ali1*, Fahima Ashraf Kasi1, Syeda Ayesha Ali2, Safa
Farooqi3, Muneeza Arbab4,
ABSTRACT
Nanotechnology is a promising field of science that implicates use of nano size
particle which anchors a prominent place in various biomedical applications. Silver is known
for its antimicrobial nature. This study elucidates the qualitative phytochemical properties of
three plant extracts and utilizing it in biosynthesis of silver nanoparticles. Green Silver
nanoparticles (AgNPs) were synthesized from 1mM Silver Nitrate (AgNO3) solution incubated
with leaf extracts of Cynara scolymus (Artichoke), Alkanna tinctoria (Alkanet), and
Lavandula angustifolia (Lavender), respectively. The synthesized nanoparticles were
characterized visually, UV-Vis spectrophotometer and using X-ray diffraction (XRD). We
further determined antimicrobial activity of these biogenic nanoparticles against pathogenic
bacterial strains (Staphylococcus aureus, and Escherichia coli) and Plant pathogenic fungal
strains (Aspergillus flavus and Aspergillus niger). Our results confirmed the formation of
AgNPs with size <100 nm. Antibacterial activity of lavender mediated AgNP was highly
significant, followed by artichoke mediated AgNP and Alkanet AgNP. However, in contrast,
Artichoke mediated AgNP showed significant activity against plant fungal strains, followed
by Alkanet AgNP, and finally by Lavender mediated AgNPs. We concluded that the three
plants have versatile biochemical molecules responsible for wide range of AgNP and its
activity against bacterial and fungal strains. Studies on combined use of AgNPs with other
antimicrobial agents may solve the problem of toxicity and possible risk of drug resistance.
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September 2021
Vol. 27, Iss. 3, Pages 253-441
