Abstract
Artemisia asiatica Nakai (Asteraceae) belongs to the Asian traditional medicinal plants. It has been used for the treatment of inflammation, cancer, microbial infections for a long time. A range of biological activities of this species can be attributed to its essential oil content. The present study aims to evaluate the essential oil production (phytomass, essential oil content and composition) of A. asiatica for taking into account of the variability of the plant. The plant material was collected from A. asiatica cultivated in the experimental field of the Centre for Ecological Research, Hung. Acad. Sci., Vácrátót. Sampling was done bi-weekly from 23 rd April to the 14th September in 2012. Lengths, fresh and dry weights of the leaf and stem of shoots were recorded. Essential oil was obtained by hydro-distillation from the fresh leaves according to the prescription of Ph.Hg.VIII. Its content was calculated both on fresh and dry weights. The oil composition was determined by using GC/FID (HP 5890 series II, HP-5 column) and GC/MS (Finnigen GCQ, DB-5MS column). Authentic samples, Kovats indices and data base figures were used for identification. The plants have reached the full height and weights of the shoots in July. From the second part of August a gradual decrease in dry weight and a quick one in the fresh weight could be observed. The essential oil content (0.03 – 0.72%) showed a similar tendency but the maximum appeared earlier, in June. The maximum yield of essential oil could also be measured in June-July. Thirty-one components were determined in the essential oil samples. Twenty mono- and seven sesquiterpenes were identified. Artemisia- and yomigi alcohols, 1,8-cineol, terpinen-4-ol, α- and γ-terpinene, β-caryophyllen, germacrene D were the main components. During the vegetation period the composition of the essential oil has not significantly varied.
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Claims 12
Claim · model-written summary
Shoots reached full height and weight in July.
Not reportedTaxon
Verbatim
e0“plants have reached the full height and weights of the shoots in July”
Claim · model-written summary
Shoot dry weight gradually decreased from late August.
Not reportedTaxon
Verbatim
e0“From the second part of August a gradual decrease in dry weight”
Claim · model-written summary
Shoot fresh weight decreased quickly from late August.
Not reportedTaxon
Verbatim
e0“From the second part of August a gradual decrease in dry weight and a quick one in the fresh weight could be observed”
Claim · model-written summary
Essential oil content ranged from 0.03 to 0.72% and peaked in June.
Not reportedTaxon
Verbatim
e0“essential oil content (0.03 – 0.72%) showed a similar tendency but the maximum appeared earlier, in June”
Claim · model-written summary
Essential oil yield was maximal in June to July.
Not reportedTaxon
Verbatim
e0“maximum yield of essential oil could also be measured in June-July”
Claim · model-written summary
Thirty-one components were determined in the oil samples.
Not reportedTaxon
Verbatim
e0“Thirty-one components were determined in the essential oil samples”
Claim · model-written summary
Twenty monoterpenes were identified in the oil.
Not reportedTaxon
Verbatim
e0“Twenty mono- and seven sesquiterpenes were identified”
Claim · model-written summary
Seven sesquiterpenes were identified in the oil.
Not reportedTaxon
Verbatim
e0“Twenty mono- and seven sesquiterpenes were identified”
Claim · model-written summary
Artemisia alcohol, yomigi alcohol and 1,8-cineol were main oil components.
- Outcome
- Artemisia- and yomigi alcohols, 1,8-cineole0
Not reportedTaxon
Verbatim
e0“Artemisia- and yomigi alcohols, 1,8-cineol, terpinen-4-ol, α- and γ-terpinene, β-caryophyllen, germacrene D were the main components”
Claim · model-written summary
Terpinen-4-ol, alpha-terpinene and gamma-terpinene were main oil components.
- Outcome
- terpinen-4-ol, α- and γ-terpinenee0
Not reportedTaxon
Verbatim
e0“terpinen-4-ol, α- and γ-terpinene, β-caryophyllen, germacrene D were the main components”
Claim · model-written summary
Beta-caryophyllene and germacrene D were main oil components.
- Outcome
- β-caryophyllen, germacrene De0
Not reportedTaxon
Verbatim
e0“β-caryophyllen, germacrene D were the main components”
Claim · model-written summary
Essential oil composition did not vary significantly over the vegetation period.
- Outcome
- composition of the essential oile0
- Direction
- not significantly variede0
- Qualifier
- During the vegetation periode0
Not reportedTaxon
Verbatim
e0“During the vegetation period the composition of the essential oil has not significantly varied”