Chemical composition and antimicrobial activity of essential oils of Juniperus excelsa Bieb. (Cupressaceae) grown in R. Macedonia
Background: There are no information of the yield, chemical composition and antimicrobial activity of essential oils of berries (EOB) or leaves (EOL) of Juniperus excelsa Bieb. (Cupressaceae) growing wild in R. Macedonia. Materials and Methods: Plant material was collected from two localities during...
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Published in | Pharmacognosy research Vol. 7; no. 1; pp. 74 - 80 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
India
Medknow Publications Pvt Ltd
01.01.2015
Medknow Publications and Media Pvt. Ltd Phcog.net Medknow Publications & Media Pvt Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | Background: There are no information of the yield, chemical composition and antimicrobial activity of essential oils of berries (EOB) or leaves (EOL) of Juniperus excelsa Bieb. (Cupressaceae) growing wild in R. Macedonia. Materials and Methods: Plant material was collected from two localities during two seasons. Essential oil composition was analyzed by gas chromatography/flame ionization detector/mass spectrometry (GC/FID/MS) and antimicrobial screening was made by disc diffusion and broth dilution method. Results and Discussion: EOB yield ranged from 1.6-9.4 ml/kg and from 8.9-13.9 ml/kg for EOL. Two chemotypes of essential oil were differentiated, α-pinene-type (with 70.81% α-pinene in EOB and 33.83% in EOL), also containing limonene, β-pinene and β-myrcene while the sabinene-type (with 58.85-62.58% sabinene in EOB and 28.52-29.49% in EOL), was rich in α-pinene, β-myrcene, limonene, cis-thujone, terpinolene and α-thujene. The most sensitive bacteria to the antimicrobial activity of EOB was Haemophilus influenzae (MIC = 31 μl/ml). EOL have showed high activity towards: Staphylococcus aureus, Streptococcus pyogenes and Haemophilus influenzae (MIC = 125 μl/ml). The pinene-type of essential oil showed moderate activity against Streptococcus pneumoniae, Staphylococcus aureus, Streptococcus agalactiae, Streptococcus pyogenes, Corynebacterium spp. and Campylobacter jejuni (MIC >50%). The sabinene-type of the oil showed moderate activity to Streptococcus pyogenes, Haemopilus influenzae, Campylobacter jejuni and Escherichia coli (MIC >50%). No activity was observed toward Candida albicans. Conclusion : The analysis of EOB and EOL revealed two chemotypes (α-pinene and sabinene type) clearly depended on the geographical origin of the Macedonian Juniperus excelsa which also affected the antimicrobial activity of these oils. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0974-8490 0976-4836 0974-8490 |
DOI: | 10.4103/0974-8490.147212 |