Md. Zahidul Islam^1,, Jannat Al Foisal², Mahbubur Rahman^2,3,*, Mst. Afsana Mimi^4,, Faridul Islam^5,, Rasel Habib^2,, Nowshin Farzana Khan⁶, Md. Atiqur Rahman⁴, Tanzima Parvin⁴ and Daxiang Cui^3,

¹Department of Chemistry, Sakarya University, 54187 Esentepe, Sakarya, Turkey

²Department of General Educational Development (GED), Faculty of Science and Information Technology, Daffodil International University, 4/2, Shukrabad, Mirpur Road, Dhanmondi, Dhaka 1207, Bangladesh

³Institute of Nano Biomedicine and Engineering, Shanghai, Engineering Research Center for Intelligent Instrument for Diagnosis and Therapy, Department of Instrument Science & Engineering, School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China

⁴Department of Applied Chemistry & Chemical Engineering, Faculty of Engineering & Technology, Islamic University, Kushtia-7003, Bangladesh

⁵IFST, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka-1205, Bangladesh

⁶Department of Biotechnology and Genetic Engineering, Faculty of Engineering & Technology, Islamic University, Kushtia-7003, Bangladesh

*Corresponding author: Tel/Fax: +88 02 9138234 (ext: 232); E-mail: mahbub_iuchem@yahoo.com

The aim of the study was to characterize the chemical constituents and determine antibacterial and antioxidant activities of essential oils and three different extracts of Dryopteris marginalis. The root had essential oil yield of 0.36 % (w/w) in which 12 organic compounds representing 97.22% of the root oils were identified. Tyranton was found as the most abundant component with 77.571 % of the total concentration in the essential oil. The zones of inhibition of different organic extracts against the tested bacteria were found in the range of 6.5-15 mm. Pseudomonas was the most vulnerable with MICs of 15.62 μg/mL by both ethyl acetate and petroleum ether extract producing 3.8 mm zone of inhibition. The essential oils extracted from roots of Dryopteris marginalis showed maximum 85.29 % inhibition of radical scavenging at 2 mg/mL concentration. Among all root extracts, methanol extract exhibited 41.11 % inhibition at 2 mg/mL concentration.

Essential oil, Dryopteris marginalis (L.), Radical scavenging, Antimicrobial activity, Alternative drug.