Abstract
The chemical components of the essential oil obtained from Chrysanthemum indicum L. were analyzed by GC-MS. Seventy-three compounds accounting for 96.65% of the extracted essential oil were identified. The main compounds in the oil were α-pinene (4.4%), 1,8-cineole (10.4%), α-thujone (6.05%), camphor (10.12%), terpinen-4-ol (3.4%), bornyl acetate (6.1%), borneol (3.6%), cis-chrysanthenol (3.4%), β-caryophyllene (5.1%), germacrene D (10.6%), and α-cadinol (3.0%). The essential oil of C. indicum exhibited stronger antibacterial activity against all oral bacteria tested (MICs, 0.1 to 1.6 mg/ml; MBCs, 0.2 to 3.2 mg/ml) than their major compounds. Furthermore, the MICs/MBCs were reduced to one half ~ one sixteenth as a result of the combinations included the essential oil with ampicillin or gentamicin for all oral bacteria. A strong bactericidal effect was exerted in drug combinations. The in vitro data suggest that the essential oil of C. indicum with other antibiotics may be microbiologically beneficial and synergistic.
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Table 1.
Compounds | RIa | RIb | C. indicum |
---|---|---|---|
Peak Area (%)c | |||
Monoterpene hydrocarbons | (14.88) | ||
Tricyclene | 1006 | 919 | 0.16 |
α-Pinene | 1012 | 930 | 4.40 |
α-Thujene | 1029 | 924 | 0.08 |
Camphene | 1071 | 943 | 2.14 |
β-Pinene | 1111 | 966 | 0.94 |
Sabinene | 1124 | 965 | 1.40 |
Myrcene | 1167 | 984 | 0.91 |
α-Terpinene | 1184 | 1007 | 0.43 |
Limonene | 1196 | 1021 | 0.31 |
α-Phellandren | 1212 | 994 | 1.40 |
cis-β-Ocimene | 1240 | 1029 | 1.10 |
γ-Terpinene | 1247 | 1050 | 0.74 |
trans-β-Ocimene | 1257 | 1035 | 0.03 |
p-Cymene | 1273 | 1011 | 0.83 |
Terpinolene | 1283 | 1078 | 0.01 |
Oxygenated monoterpenes | (52.14) | ||
1,8-Cineole | 1215 | 1023 | 10.40 |
α-Terpinolene | 1286 | 1078 | 0.23 |
cis-3-Hexen-1-ol | 1386 | 836 | 0.05 |
α-Thujone | 1423 | 1080 | 6.05 |
β-Thujone | 1440 | 1091 | 0.32 |
trans-Sabinene hydrate | 1465 | 1052 | 0.41 |
α-Terpinyl acetate | 1470 | 1329 | 1.63 |
Chrysanthenone | 1508 | 1096 | 2.30 |
Camphor | 1517 | 1124 | 10.12 |
Linalool | 1546 | 1106 | 0.37 |
Pinocarvone | 1562 | 1134 | 0.87 |
cis-Chrysanthenyl acetate | 1570 | 1243 | 0.40 |
Bornyl acetate | 1578 | 1265 | 6.10 |
Terpinen-4-ol | 1601 | 1158 | 3.40 |
Umbellulone | 1639 | 1165 | 0.70 |
trans-Chrysanthenyl acetate | 1675 | 1186 | 0.30 |
trans-Piperitol | 1676 | 1205 | t |
α-Terpineol | 1701 | 1169 | 0.70 |
Borneol | 1703 | 1150 | 3.60 |
Piperitone | 1721 | 1220 | 0.13 |
Carvone | 1732 | 1210 | 0.14 |
cis-Chrysanthenol | 1754 | 1150 | 3.40 |
Myrtenol | 1793 | 1177 | 0.01 |
trans-Carveol | 1832 | 1181 | 0.20 |
p-Cymen-8-ol | 1835 | 1165 | 0.21 |
cis-Carveol | 1862 | 1196 | 0.10 |
Sesquiterpene hydrocarbons | (22.91) | ||
α-Copaene | 1493 | 1370 | 0.30 |
α-Gurjunene | 1525 | 1389 | 0.10 |
Berkheyaradulen | 1531 | 1377 | 0.16 |
β-Elemene | 1589 | 1381 | 1.20 |
β-Caryophyllene | 1594 | 1418 | 5.10 |
α-Humulene | 1665 | 1440 | 0.50 |
trans-β-Farnesene | 1668 | 1454 | 0.85 |
α-Muurolene | 1686 | 1464 | 0.20 |
γ-Cadinene | 1690 | 1497 | 0.20 |
Germacrene D | 1705 | 1465 | 10.6 |
α-Zingiberene | 1715 | 1490 | 1.30 |
β-Selinene | 1717 | 1471 | 0.21 |
cis,trans-α-Farnesene | 1726 | 1447 | 0.30 |
δ-Cadinene | 1762 | 1505 | 1.50 |
β-Sesquiphellandrene | 1770 | 1515 | 0.18 |
ar-Curcumene | 1773 | 1472 | 0.21 |
Oxygenated sesquiterpenes | (5.97) | ||
Caryophyllene oxide | 1979 | 1556 | 0.78 |
trans-Nerolidol | 2043 | 1555 | 0.09 |
Globulol | 2058 | 1568 | 0.10 |
Guaiol | 2105 | 1576 | 0.20 |
Spathulenol | 2125 | 1551 | 0.40 |
Eugenol | 2146 | 1323 | 0.11 |
α-Cedrol | 2150 | 1575 | 0.06 |
α-Cadinol | 2173 | 1628 | 3.00 |
Torreyol | 2179 | 1619 | 0.21 |
T-Muurolol | 2234 | 1615 | 1.00 |
cis,trans-Farnesol | 2298 | 1695 | 0.02 |
Others | (0.75) | ||
1,2,4-Trimethylbenzene | 1236 | 979 | 0.07 |
n-Hexanol | 1355 | 851 | 0.02 |
1-Octen-3-ol | 1453 | 969 | 0.04 |
Tricosane | 2300 | 2300 | 0.50 |
Tetracosane | 2400 | 2400 | 0.12 |
Total identified | (96.65%) |
Table 2.
Strains | Essentail oil | α-pinene | Camphor | 1,8-Cineole | Terpinen-4-ol | Borneol | β-Caryophyllene | Ampicillin | Gentamicin |
---|---|---|---|---|---|---|---|---|---|
Escherichia coli ATCC 25922 | 12.8/12.8< | 12.8/12.8< | 12.8/12.8< | 6.4/6.4 | 1.6/3.2 | 0.8/0.8 | 12.8/12.8< | 128/256 × 10–3 | 4/16 × 10–3 |
Staphylococcus aureus ATCC 29213 | 0.8/3.2 | 6.4/12.8 | 12.8/12.8< | 12.8/12.8 | 1.6/1.6 | 1.6/3.2 | 12.8/12.8< | 8/16 × 10–3 | 1/4 × 10–3 |
Staphylococcus epidermidis ATCC 12228 | 0.4/1.6 | 12.8/12.8< | 12.8/12.8< | 1.6/3.2 | 1.6/3.2 | 1.6/1.6 | 12.8/12.8< | 32/64 × 10–3 | 2/2 × 10–3 |
Streptococcus pyogenes ATCC 21059 | 0.4/1.6 | 12.8/12.8 | 12.8/12.8< | 12.8/12.8 | 0.8/1.6 | 0.4/0.8 | 12.8/12.8 | 4/8 × 10–3 | 8/16 × 10–3 |
Streptococcus mutans ATCC 25175 | 0.4/0.8 | 6.4/12.8 | 12.8/12.8 | 12.8/12.8 | 1.6/3.2 | 0.8/1.6 | 3.2/3.2 | 2/4 × 10–3 | 4/8 × 10–3 |
Streptococcus sanguinis ATCC 10556 | 0.4/0.8 | 6.4/12.8 | 6.4/12.8 | 12.8/12.8 | 1.6/3.2 | 1.6/3.2 | 1.6/3.2 | 8/32 × 10–3 | 8/16 × 10–3 |
Streptococcus sobrinus ATCC 27607 | 0.4/0.8 | 12.8/12.8 | 6.4/12.8 | 12.8/12.8 | 1.6/3.2 | 0.2/0.8 | 6.4/12.8 | 2/4 × 10–3 | 4/8 × 10–3 |
Streptococcus ratti aKCTC 3294 | 1.6/3.2 | 12.8/12.8< | 12.8/12.8< | 12.8/12.8 | 3.2/3.2 | 1.6/6.4 | 12.8/12.8< | 4/8 × 10–3 | 8/8 × 10–3 |
Streptococcus criceti KCTC 3292 | 0.8/1.6 | 12.8/12.8< | 12.8/12.8 | 12.8/12.8 | 3.2/3.2 | 3.2/6.4 | 12.8/12.8< | 2/4 × 10–3 | 4/8 × 10–3 |
Streptococcus anginosus ATCC 31412 | 0.2/0.8 | 6.4/12.8 | 6.4/12.8 | 6.4/6.4 | 1.6/3.2 | 0.4/0.8 | 12.8/12.8< | 4/8 × 10–3 | 8/16 × 10–3 |
Streptococcus gordonii ATCC 10558 | 0.2/0.4 | 3.2/6.4 | 6.4/12.8 | 3.2/6.4 | 0.1/0.2 | 0.4/0.8 | 1.6/3.2 | 1/2 × 10–3 | 2/4 × 10–3 |
Actinobacillus actinomycetemcomitans ATCC 43717 | 0.2/0.4 | 6.4/12.8 | 6.4/12.8 | 6.4/12.8 | 1.6/3.2 | 0.8/1.6 | 0.8/1.6 | 64/128 × 10–3 | 1/2 × 10–3 |
Fusobacterium nucleatum ATCC 10953 | 0.2/0.4 | 3.2/3.2 | 6.4/12.8 | 3.2/6.4 | 0.1/0.4 | 0.1/0.2 | 6.4/12.8 | 0.125/0.25 × 10–3 | 32/32 × 10–3 |
Prevotella intermedia ATCC 25611 | 0.2/0.8 | 0.8/0.8 | 3.2/3.2 | 3.2/6.4 | 0.2/0.4 | 0.2/0.4 | 0.8/1.6 | 8/32 × 10–3 | 1/1 × 10–3 |
Porphylomonas gingivalis ATCC 33277 | 0.1/0.2 | 0.8/1.6 | 3.2/6.4 | 6.4/6.4 | 0.1/0.4 | 0.4/0.8 | 0.4/0.8 | 1/1 × 10–3 | 256/512 × 10–3 |
Table 3.
Strains | Agent | MIC/MBCa | FICc | FICIc | Outcome | |
---|---|---|---|---|---|---|
Alone | Combinationb | |||||
Escherichia coli ATCC 25922 | Essential oil Ampicillin | 12.8/12.8< 128/256 | 6.4/6.4 32/128 | 0.5 0.25 | 0.75 | Additive |
Staphylococcus aureus ATCC 29213 | Essential oil Ampicillin | 0.8/3.2 8/16 | 0.4/0.4 2/4 | 0.5 0.25 | 0.75 | Additive |
Staphylococcus epidermidis ATCC 12228 | Essential oil Ampicillin | 0.4/1.6 32/64 | 0.2/0.4 16/32 | 0.5 0.5 | 1 | Additive |
Streptococcus pyogenes ATCC 21059 | Essential oil Ampicillin | 0.4/1.6 4/8 | 0.2/0.4 2/2 | 0.5 0.5 | 1 | Additive |
S. mutans ATCC 25175 | Essential oil Ampicillin | 0.4/0.8 2/4 | 0.1 /02 0.5/1 | 0.25 0.25 | 0.5 | Synergistic |
S. sanguinis ATCC 10556 | Essential oil Ampicillin | 0.4/1.6 8/32 | 0.1/0.2 2/4 | 0.25 0.25 | 0.5 | Synergistic |
S. sobrinus ATCC 27607 | Essential oil Ampicillin | 0.4/0.8 2/4 | 0.2/0.2 0.5/1 | 0.5 0.25 | 0.75 | Additive |
S. ratti KCTC 3294 | Essential oil Ampicillin | 1.6/3.2 4/8 | 0.4/0.8 1/2 | 0.25 0.25 | 0.5 | Synergistic |
S. criceti KCTC 3292 | Essential oil Ampicillin | 0.8/1.6 2/4 | 0.4/0.4 0.5/1 | 0.5 0.25 | 0.75 | Additive |
S. anginosus ATCC 31412 | Essential oil Ampicillin | 0.2/0.8 4/8 | 0.05/0.1 0.5/2 | 0.25 0.125 | 0.375 | Synergistic |
S. gordonii ATCC 10558 | Essential oil Ampicillin | 0.2/0.4 1/2 | 0.05/0.1 0.025/0.5 | 0.25 0.25 | 0.5 | Synergistic |
A. actinomycetemcomitans ATCC 43717 | Essential oil Ampicillin | 0.2/0.4 64/128 | 0.1/0.2 8/16 | 0.5 0.125 | 0.625 | Additive |
F. nucleatum ATCC 10953 | Essential oil Ampicillin | 0.2/0.4 0.125/0.25 | 0.05/0.1 0.015/0.031 | 0.25 0.125 | 0.375 | Synergistic |
P. intermedia ATCC 25611 | Essential oil Ampicillin | 0.2/0.8 8/32 | 0.05/1 2/4 | 0.25 0.25 | 0.5 | Synergistic |
P. gingivalis ATCC 33277 | Essential oil Ampicillin | 0.1/0.2 1/1 | 0.025/0.1 0.25/0.5 | 0.25 0.25 | 0.5 | Synergistic |
Table 4.
Strains | Agent | MIC/MBCa | FICc | FICIc | Outcome | |
---|---|---|---|---|---|---|
Alone | Combinationb | |||||
Escherichia coli ATCC 25922 | Essential oil Gentamicin | 12.8/12.8< 4/16 | 6.4/6.4 1/2 | 0.5 0.25 | 0.75 | Additive |
Staphylococcus aureus ATCC 29213 | Essential oil Gentamicin | 0.8/3.2 1/4 | 0.2/0.4 0.25/1 | 0.25 0.25 | 0.5 | Synergistic |
Staphylococcus epidermidis ATCC 12228 | Essential oil Gentamicin | 0.4/1.6 2/2 | 0.2/0.4 0.5/0.5 | 0.5 0.25 | 0.75 | Additive |
Streptococcus pyogenes ATCC 21059 | Essential oil Gentamicin | 0.4/1.6 8/16 | 0.2/0.2 4/8 | 0.5 0.5 | 1 | Additive |
S. mutans ATCC 25175 | Essential oil Gentamicin | 0.4/0.8 4/8 | 0.1/0.2 1/2 | 0.25 0.25 | 0.5 | Synergistic |
S. sanguinis ATCC 10556 | Essential oil Gentamicin | 0.4/0.8 8/16 | 0.1/0.2 2/4 | 0.25 0.25 | 0.5 | Synergistic |
S. sobrinus ATCC 27607 | Essential oil Gentamicin | 0.4/0.8 4/8 | 0.1/0.2 1/2 | 0.25 0.25 | 0.5 | Synergistic |
S. ratti KCTC 3294 | Essential oil Gentamicin | 1.6/3.2 8/8 | 0.4/0.8 4/4 | 0.25 0.5 | 0.75 | Additive |
S. criceti KCTC 3292 | Essential oil Gentamicin | 0.8/1.6 4/8 | 0.2/0.4 1/2 | 0.25 0.25 | 0.5 | Synergistic |
S. anginosus ATCC 31412 | Essential oil Gentamicin | 0.2/0.8 8/16 | 0.05/0.1 1/4 | 0.25 0.125 | 0.375 | Synergistic |
S. gordonii ATCC 10558 | Essential oil Gentamicin | 0.2/0.4 2/4 | 0.05/0.1 0.5/1 | 0.25 0.25 | 0.5 | Synergistic |
A. actinomycetemcomitans ATCC 43717 | Essential oil Gentamicin | 0.2/0.4 1/2 | 0.05/0.1 0.125/0.5 | 0.25 0.125 | 0.375 | Synergistic |
F. nucleatum ATCC 10953 | Essential oil Gentamicin | 0.2/0.4 32/32 | 0.05/0.1 8/8 | 0.25 0.25 | 0.5 | Synergistic |
P. intermedia ATCC 25611 | Essential oil Gentamicin | 0.2/0.8 1/1 | 0.05/0.1 0.25/0.5 | 0.25 0.25 | 0.5 | Synergistic |
P. gingivalis ATCC 33277 | Essential oil Gentamicin | 0.1/0.2 256/512 | 0.025/0.05 32/32 | 0.25 0.125 | 0.375 | Synergistic |