ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
B.L. Bijula1, Swapna Alex1 , K.B. Soni1, K.N. Anith2, M. Joy3, Deepa S. Nair4, R. Beena5 and Amala Benny1
1Department of Plant Biotechnology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram – 695 522, Kerala, India.
2Department of Agricultural Microbiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram – 695 522, Kerala, India.
3Department of Plant Pathology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram – 695 522, Kerala, India.
4Department of Plantation Crops and Spices, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram – 695 522, Kerala, India.
5Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram – 695 522, Kerala, India.
J Pure Appl Microbiol. 2022;16(2):1122-1129 | Article Number: 7478
https://doi.org/10.22207/JPAM.16.2.38 | © The Author(s). 2022
Received: 08/12/2021 | Accepted: 08/03/2022 | Published online: 27/05/2022
Issue online: June 2022
Abstract

Eco-friendly anti-algal agents are in demand for preventing the growth of unwanted algae. Green synthesized nanoparticles exhibit antimicrobial properties and have been used as a better alternative against chemical and physical processes. In the present study, treatment of silver nitrate with leaf extracts (5% w/v) of Tinospora cordifolia, a plant with proven antimicrobial effects, exhibited UV-visible absorption maxima between 440-460 nm after 1h indicating bioreduction of silver to nanoparticles. The green synthesised silver nanoparticles (5 mgl-1) exhibited inhibition zones against Chlamydomonas reinhardtii in in vitro agar assays. Treatment with green synthesised silver nanoparticles during exponential phase of algal growth resulted in significant reduction in algal population, carbohydrate, protein and chlorophyll contents confirming the anti-algal potential. This is the first report on the growth inhibitory potential of green synthesised silver nanoparticles against green algae.

Keywords

Green synthesized silver nanoparticles, Tinospora cordifolia, Chlamydomonas reinhardtii, algicidal property

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