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Evaluation of extracts and essential oil from Callistemon viminalis leaves: antibacterial and antioxidant activities, total phenolic and flavonoid contents.
Asian Pac J Trop Med 2013; 6(10):785-91AP

Abstract

OBJECTIVE

To investigate antioxidant and antibacterial activities of Callistemon viminalis (C. viminalis) leaves.

METHODS

The essential oil of C. viminalis leaves obtained by hydro-distillation was analyzed by GC/MS. Different extracts were tested for total phenolic and flavonoid contents and in vitro antioxidant (DPPH assay) and antibacterial (agar disc diffusion and 96-well micro-plates methods) actives.

RESULTS

Fourteen components were identified in the essential oil, representing 98.94% of the total oil. The major components were 1,8-cineole (64.53%) and α-pinene (9.69%). Leaf essential oil exhibited the highest antioxidant activity of (88.60±1.51)% comparable to gallic acid, a standard compound [(80.00±2.12)%]. Additionally, the biggest zone of inhibitions against the studied bacterial strains was observed by the essential oil when compared to the standard antibiotic (tetracycline). The crude methanol extract and ethyl acetate fraction had a significant antibacterial activity against the tested bacterial strains.

CONCLUSIONS

It can be suggested that C. viminalis is a great potential source of antibacterial and antioxidant compounds useful for new antimicrobial drugs from the natural basis. The present study revealed that the essential oil as well as the methanol extracts and ethyl acetate fraction of C. viminalis leaves exhibited highly significant antibacterial activity against the tested bacterial strains.

Authors+Show Affiliations

Forestry and Wood Technology Department, Faculty of Agriculture (EL-Shatby), Alexandria University, Alexandria, Egypt. zidan_forest@yahoo.comNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23870467

Citation

Salem, Mohamed Z M., et al. "Evaluation of Extracts and Essential Oil From Callistemon Viminalis Leaves: Antibacterial and Antioxidant Activities, Total Phenolic and Flavonoid Contents." Asian Pacific Journal of Tropical Medicine, vol. 6, no. 10, 2013, pp. 785-91.
Salem MZ, Ali HM, El-Shanhorey NA, et al. Evaluation of extracts and essential oil from Callistemon viminalis leaves: antibacterial and antioxidant activities, total phenolic and flavonoid contents. Asian Pac J Trop Med. 2013;6(10):785-91.
Salem, M. Z., Ali, H. M., El-Shanhorey, N. A., & Abdel-Megeed, A. (2013). Evaluation of extracts and essential oil from Callistemon viminalis leaves: antibacterial and antioxidant activities, total phenolic and flavonoid contents. Asian Pacific Journal of Tropical Medicine, 6(10), pp. 785-91. doi:10.1016/S1995-7645(13)60139-X.
Salem MZ, et al. Evaluation of Extracts and Essential Oil From Callistemon Viminalis Leaves: Antibacterial and Antioxidant Activities, Total Phenolic and Flavonoid Contents. Asian Pac J Trop Med. 2013;6(10):785-91. PubMed PMID: 23870467.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of extracts and essential oil from Callistemon viminalis leaves: antibacterial and antioxidant activities, total phenolic and flavonoid contents. AU - Salem,Mohamed Z M, AU - Ali,Hayssam M, AU - El-Shanhorey,Nader A, AU - Abdel-Megeed,Ahmed, PY - 2013/05/05/received PY - 2013/06/06/revised PY - 2013/06/10/accepted PY - 2013/7/23/entrez PY - 2013/7/23/pubmed PY - 2014/2/18/medline KW - Antibacterial activity KW - Antioxidant activity KW - Callistemon viminalis KW - Essential oil KW - Flavonoid content KW - Phenolic content SP - 785 EP - 91 JF - Asian Pacific journal of tropical medicine JO - Asian Pac J Trop Med VL - 6 IS - 10 N2 - OBJECTIVE: To investigate antioxidant and antibacterial activities of Callistemon viminalis (C. viminalis) leaves. METHODS: The essential oil of C. viminalis leaves obtained by hydro-distillation was analyzed by GC/MS. Different extracts were tested for total phenolic and flavonoid contents and in vitro antioxidant (DPPH assay) and antibacterial (agar disc diffusion and 96-well micro-plates methods) actives. RESULTS: Fourteen components were identified in the essential oil, representing 98.94% of the total oil. The major components were 1,8-cineole (64.53%) and α-pinene (9.69%). Leaf essential oil exhibited the highest antioxidant activity of (88.60±1.51)% comparable to gallic acid, a standard compound [(80.00±2.12)%]. Additionally, the biggest zone of inhibitions against the studied bacterial strains was observed by the essential oil when compared to the standard antibiotic (tetracycline). The crude methanol extract and ethyl acetate fraction had a significant antibacterial activity against the tested bacterial strains. CONCLUSIONS: It can be suggested that C. viminalis is a great potential source of antibacterial and antioxidant compounds useful for new antimicrobial drugs from the natural basis. The present study revealed that the essential oil as well as the methanol extracts and ethyl acetate fraction of C. viminalis leaves exhibited highly significant antibacterial activity against the tested bacterial strains. SN - 2352-4146 UR - https://www.unboundmedicine.com/medline/citation/23870467/Evaluation_of_extracts_and_essential_oil_from_Callistemon_viminalis_leaves:_antibacterial_and_antioxidant_activities_total_phenolic_and_flavonoid_contents_ L2 - http://linkinghub.elsevier.com/retrieve/pii/S1995-7645(13)60139-X DB - PRIME DP - Unbound Medicine ER -