|
Composition and antimicrobial activities of volatile
components of Lippia javanica
Nkhumeleni
Jeoffrey Manenzhe,
Natasha Potgieter and Teunis
van Ree
The volatile oil of Lippia javanica
was prepared by hydrodistillation of leaves,
flowers and stems, and characterized by GC–MS. The major component was
3-methyl-6-(1-methylethylidene)-cyclohex-2-en-1-one (piperitenone). The oil was tested for
antimicrobial activity on cultures of Escherichia coli, Bacillus subtilis and Staphylococcus aureus,
and found to inhibit E. coli and S. aureus
at 1% dilution. The oil was also active against Plasmodium falciparum in micromolar
concentrations.
Volatile components of L. javanica:
|
tR (min:s)
|
Identification
|
Percentage of total
oil
|
|
14:58
|
Limonene
|
1.6
|
|
21:05
|
Linalool
|
1.8
|
|
28:37
|
o-Isopropenylanisole
|
9.7
|
|
29:27
|
α-Terpineol
|
0.8
|
|
31:27
|
Z-Ocimenone
|
3.9
|
|
36:37
|
Piperitenone
|
74.4
|
|
40:36
|
β-Caryophyllene
|
1.0
|
|
