ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Kalidoss Rajendran1, Shanmugam Poornima2 and
Ponmurugan Ponnusamy1
1Biomedical Research Laboratory, Department of Botany, Bharathiar University, Coimbatore – 641 046, Tamil Nadu, India.
2Department of Biotechnology, K.S.R. College of Technology, Tiruchengode – 637 215,
Tamil Nadu, India.
J Pure Appl Microbiol. 2020;14(4):2525-2541 | Article Number: 6621 | © The Author(s). 2020
Received: 31/08/2020 | Accepted: 21/09/2020 | Published: 11/12/2020

Substances which are normally secondary metabolites in a lichen are known to possess various medicinal properties but little is known about the biological activities of compounds present in these mycobiont culture extract. The objectives of the present study were isolation and optimization of growth conditions of the mycelia from Parmotrema austrosinense and assess the antiproliferative and antimicrobial activities of acetone extracts. The extraction of bioactive compound from mycobiont culture was achieved by using acetone and standard Soxhlet extraction procedures. The culture extract was subjected to silica gel column chromatography and detection of compound in thin layer chromatography. HPLC, UV vis, IR spectra, microcrystallization and NMR were done for the purified compound. The antimicrobial activity in the extracts were assayed using the standard disc diffusion and broth microdilution protocol against microbial strains. The lecanoric acid in the extracts was purified and MTT method was applied to assess antiproliferative activity against DLA cancer cells. The culture extract containing lecanoric acid exhibited antimicrobial activity against the test strains with the Minimum Inhibitory Concentrations varied between 0.83±0.28 and 2.3±1.5 mg mL−1. The lecanoric acid inhibited the growth of DLA cancer cells with inhibitory concentration (IC50) of about 42±1.5 µg mL−1. Conclusion: The result of the present study suggests that this compound might possess potent antitumor property and should be further analysed using appropriate animal model and clinical trials.


Lichen, Mycobiont, Lecanoric acid, Microcrystallization, Antiproliferative

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© The Author(s) 2020. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.