Volatile constituents of essential oils isolated at different growth stages from three Conyza species growing in Greece
✍ Scribed by O. Tzakou; C. Vagias; A. Gani; A. Yannitsaros
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 77 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0882-5734
- DOI
- 10.1002/ffj.1451
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✦ Synopsis
The essential oils isolated at vegetative, flowering and flowering-fruiting stages of three Conyza species growing in Greece were analysed by GC-MS; 54 constituents were identified. The oils of C. albida were rich in limonene (10.0-21.1%), germacrene D (10.5-20.2%) and cis-lachnophyllum ester (8.8-36.5%). The oils of C. bonariensis were rich in limonene (8.3-15.1%), (E)-β β β β β-ocimene (11.5-18.9%), cis-lachnophyllum ester (10.8-21.2%) and matricaria ester (9.4-17.5%). The oils of C. canadensis were rich in limonene (50.0-70.3%) and (E)-β β β β β-ocimene (4.0-7.5%
). The oils showed significant variations among the growth stages. These variations can be used for distinguishing the three species.