Abstract
In the present paper, the essential oil and the volatiles emitted in vivo by leaves of A. herba alba, which grows wild in center of Tunisia, were analyzed by GC-MS and SPME, respectively. The essential oil was characterized by the predominance of oxygenated monoterpenes (93.3%) with α-thujone as the major compound (45.5%) followed by β-thujone (11.4%), trans-sabinyl acetate (10.1%) and 1,8-cineole (7.4%). The SPME analyses showed that oxygenated monoterpenes were the most representative compounds (64.9%). The major ones were α-thujone (37.9%), germacrene D (16.5%), 1,8-cineole (8.4%) followed by β-thujone (7.8%). Moreover, different activities (antioxidant, antibacterial, allelopathic and insecticidal) of the leaf essential oil were investigated. The antioxidant activity was ascertained by evaluating its inhibitory effect against DPPH and ABTS. The results showed that the essential oil had a strong activity and it was more effective against the DPPH radical (IC 50 = 6 μg/mL) than the ABTS radical (IC 50 = 40 μg/mL). In antibacterial screening, it inhibited the growth of all bacteria tested except Salmonella anatum and Salmonella salamae which were resistant to this oil type. Staphylococcus aureus and Vibrio cholera were found to be extremely sensitive with the lowest MIC value (0.007 mg/mL). In addition, allelopathic activity was evaluated against Lactuca sativa and Raphanus sativus. Data showed that, with essential oil, seed germination was completely inhibited for both of them, suggesting a potent allelopathic potential for the evaluated oil. Insecticidal activity was investigated against Culex pipiens larvae and a weak activity (LC 50 241.1 ppm) for this A. herba alba essential oil.
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Claims 18
Claim · model-written summary
Oxygenated monoterpenes predominated in the leaf essential oil at 93.3%.
Verbatim
e0“The essential oil was characterized by the predominance of oxygenated monoterpenes (93.3%)”
t0“leaves of A. herba alba”
Claim · model-written summary
Alpha-thujone was the major essential oil compound at 45.5%.
Verbatim
e0“with α-thujone as the major compound (45.5%)”
t0“leaves of A. herba alba”
Claim · model-written summary
Beta-thujone accounted for 11.4% of the essential oil.
Verbatim
e0“β-thujone (11.4%)”
t0“leaves of A. herba alba”
Claim · model-written summary
Trans-sabinyl acetate accounted for 10.1% of the essential oil.
Verbatim
e0“trans-sabinyl acetate (10.1%)”
t0“leaves of A. herba alba”
Claim · model-written summary
1,8-cineole accounted for 7.4% of the essential oil.
Verbatim
e0“1,8-cineole (7.4%)”
t0“leaves of A. herba alba”
Claim · model-written summary
Oxygenated monoterpenes comprised 64.9% of the SPME profile.
Verbatim
e0“oxygenated monoterpenes were the most representative compounds (64.9%)”
t0“leaves of A. herba alba”
Claim · model-written summary
Alpha-thujone comprised 37.9% of the SPME profile.
Verbatim
e0“α-thujone (37.9%)”
t0“leaves of A. herba alba”
Claim · model-written summary
Germacrene D comprised 16.5% of the SPME profile.
Verbatim
e0“germacrene D (16.5%)”
t0“leaves of A. herba alba”
Claim · model-written summary
1,8-cineole comprised 8.4% of the SPME profile.
Verbatim
e0“1,8-cineole (8.4%)”
t0“leaves of A. herba alba”
Claim · model-written summary
Beta-thujone comprised 7.8% of the SPME profile.
Verbatim
e0“β-thujone (7.8%)”
t0“leaves of A. herba alba”
Claim · model-written summary
The oil inhibited DPPH with an IC50 of 6 μg/mL, more effectively than ABTS.
- Taxon
- Artemisia herba-alba
Artemisia herba-albat0 - Outcome
- DPPH radicale0
- Direction
- more effectivee0
- Value
- 6 μg/mLe0
- Qualifier
- 40 μg/mLe0
- Comparator
- ABTS radicale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more effective against the DPPH radical (IC 50 = 6 μg/mL) than the ABTS radical (IC 50 = 40 μg/mL)”
t0“Artemisia herba-alba leaves”
Claim · model-written summary
The oil inhibited ABTS with an IC50 of 40 μg/mL.
Verbatim
e0“ABTS radical (IC 50 = 40 μg/mL)”
t0“leaves of A. herba alba”
Claim · model-written summary
The oil inhibited tested bacteria except two resistant Salmonella species.
Verbatim
e0“it inhibited the growth of all bacteria tested except Salmonella anatum and Salmonella salamae which were resistant to this oil type”
t0“leaves of A. herba alba”
Claim · model-written summary
Staphylococcus aureus was extremely sensitive to the oil, with a MIC of 0.007 mg/mL.
Verbatim
e0“Staphylococcus aureus and Vibrio cholera were found to be extremely sensitive with the lowest MIC value (0.007 mg/mL)”
t0“leaves of A. herba alba”
Claim · model-written summary
Vibrio cholera was extremely sensitive to the oil, with a MIC of 0.007 mg/mL.
Verbatim
e0“Staphylococcus aureus and Vibrio cholera were found to be extremely sensitive with the lowest MIC value (0.007 mg/mL)”
t0“leaves of A. herba alba”
Claim · model-written summary
The oil completely inhibited Lactuca sativa seed germination.
- Taxon
- Lactuca sativa
Lactuca sativae1 - Treatment
- essential oile0
- Outcome
- seed germinatione0
- Direction
- completely inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with essential oil, seed germination was completely inhibited for both of them”
e1“Lactuca sativa and Raphanus sativus”
Claim · model-written summary
The oil completely inhibited Raphanus sativus seed germination.
- Taxon
- Raphanus sativus
Raphanus sativuse1 - Treatment
- essential oile0
- Outcome
- seed germinatione0
- Direction
- completely inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with essential oil, seed germination was completely inhibited for both of them”
e1“Lactuca sativa and Raphanus sativus”
Claim · model-written summary
The oil had weak insecticidal activity against Culex pipiens larvae, with an LC50 of 241.1 ppm.
- Taxon
- A. herba albat0
- Interactor
- Culex pipiens
Culex pipiense0pest - Outcome
- weak activitye0
- Value
- 241.1 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“against Culex pipiens larvae and a weak activity (LC 50 241.1 ppm)”
t0“leaves of A. herba alba”
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See all 271 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.