Abstract
Variations in the essential oil composition of Laggera crispata (Vahl) Hepper & Wood due to plant parts (leaf, flower, stem, and root) was assessed using gas chromatography (GC/FID) and gas chromatography–mass spectrometry. A total of 57 constituents, representing 86.39–93.55 % of the total oil compositions were identified. Major components of these essential oils were 2,5-dimethoxy-p-cymene (22.28–75.55 %), 10-epi-γ-eudesmol (0.51–21.93 %), linalool (0.03–9.84 %), caryophyllene oxide (0.35–7.97 %), α-humulene (1.40–6.20 %), eudesm-7(11)-en-4-ol (0.03–4.13 %), p-menth-3,8-diene (0.0–4.10 %), 7-epi-α-eudesmol (0.0–4.01 %), and (E)-caryophyllene (1.06–3.88 %). Comparative results showed considerable variations in the quantitative and qualitative essential oil composition of L. crispata due to plant parts. Leaf essential oil was dominated by oxygenated sesquiterpenes (49.69 %), while the flower, stem, and root essential oils were characterised by higher amount of benzenoid compounds (49.81–64.41; 63.67 and 76.95 %, respectively). 2,5-dimethoxy-p-cymene, the most abundant constituent was noticed to be higher in root essential oil whilst it was recorded lowest in leaf essential oil. Moreover, the flower and stem essential oils were more closely related, while the leaf and root displayed more organ specific composition.
Published Version
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