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BMC Complement Altern Med. 2017 Jul 5;17(1):351. doi: 10.1186/s12906-017-1861-6.

Chemical constituents, antibacterial and antioxidant properties of the essential oil flower of Tagetes minuta grown in Cala community Eastern Cape, South Africa.

Author information

1
SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa. aboi.igwaran@yahoo.com.
2
Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice, Eastern Cape Province, 5700, South Africa. aboi.igwaran@yahoo.com.
3
SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa.
4
Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice, Eastern Cape Province, 5700, South Africa.
5
Academic and Research Division, University of Fort Hare, Private Bag X1314, Alice, Eastern Cape Province, 5700, South Africa.

Abstract

BACKGROUND:

Tagetes minuta has a long record of human use for the treatment of stomach and intestinal diseases. Most drugs used for diseases treatment are less efficacious with side effects and this brought the search for new treatment regimens mainly from medicinal plants.

METHOD:

The essential oil (EO) was extracted by Clevenger's-type apparatus and its chemical composition, antioxidant and antibacterial properties were determined by GC-MS, spectrophotometric and broth dilution methods respectively. S. uberis, E. cloacae, S. aureus, M. smegmatis, L. ivanovii, Vibrio spp. and E. coli bacteria strains were used as test bacteria.

RESULTS:

GC-MS analysis revealed 98 compounds in the EO flower of T. minuta and β-Ocimene (14. 40%) was the major chemical constituents. The EO exhibited highest inhibitory effect against DPPH radical, followed by its effect on ABTS, while LP radical showed the least sensitivity with IC50 values of 2.45 mg/mL, 2.76 mg/mL and 3.23 mg/mL respectively. The EO showed antibacterial activities against all test organisms with MIC value for S. aureus, M. smegatis and S. uberis at 0.125 mg/mL and for L. ivanovii, Vibrio spp., E. cloacae and E. coli at 0.06 mg/mL. The EO showed MBC against E. cloacae and E. coli at 0.06 mg/mL at 0.5 mg/mL for S. uberis and 0.125 mg/mL for Vibrio spp.

CONCLUSION:

Findings from this study suggest that the EO of T. minuta flower may be a useful candidate in the search for lead constituents for the synthesis of new potent antibacterial and antioxidant agent.

KEYWORDS:

Antibacterial; Antioxidant; Tegates minuta; Vitamin C

PMID:
28676058
PMCID:
PMC5497343
DOI:
10.1186/s12906-017-1861-6
[Indexed for MEDLINE]
Free PMC Article

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