Chemical examination of the leaf essential oil of Curcuma longa L. from the North Indian plains

Abstract

The essential oil obtained by hydrodistillation of the fresh leaves of Curcuma longa L. (Zingiberaceae), growing in the Research farm of the Central Institute of Medicinal and Aromatic Plants field station Pant Nagar, Uttar Pradesh, India, was investigated by GC and GC-MS. Twenty compounds were identified, accounting for 72% of the contents. The oil of C. longa consisted mainly of monoterpenoids; monoterpene hydrocarbons (57%), oxygenated monoterpenes (10%), sesquiterpene hydrocarbons (3.3%) and oxygenated sesquiterpenes (2.1%). The major constituents of the oil were p-cymene (25.4%) and 1,8-cineole (18%), followed by cis-sabinol (7.4%) andˇ-pinene (6.3%).

An experimental design approach for the extraction of volatile compounds from turmeric leaves (Curcuma domestica) using pressurised liquid extraction (PLE)

“…Similarly, the proportion of major constituents; a-phellandrene, 1,8-cineole, pcymene and terpinolene in leaf oil of Bhutanese origin was 18.2, 14.6, 13.3 and 11.6, respectively. While, the proportion of p-cymene, 1,8-cineole, cis-sabinol and a-pinene in the leaf oil from North Indian was 25.4, 18.0, 7.4 and 6.3, respectively, as major constituents (Garg, Mengi, Patra, Charles, & Kumar, 2002). Leela, Tava, Shafi, John, and Chembakam (2002) obtained the proportion of aphellandrene (32.6), terpinolene (26.0), 1,8-cineole (6.5) and pcymene (5.9) in turmeric leaves cultivated in Calicut, India.…”

Chemical Composition and Biological Activities of Essential Oils of Curcuma Species

“…Turmeric root EO from Kerala, India contained ar -turmerone (46.8%) and ar -curcumene (7.0%) as the main components [ 70 ]. There are seven different chemotypes of the C. longa leaf EO reported so far [ 94 ]: (1) ar -turmerone-rich chemotype [ 94 ]; (2) α-phellandrene-rich chemotype [ 66 , 68 , 70 , 83 , 89 , 91 , 95 , 96 ]; (3) terpinolene-rich chemotype [ 84 , 86 , 93 ]; (4) β-sesquiphellandrene-rich chemotype [ 92 ]; (5) p -cymene-rich chemotype [ 90 ]; (6) 1,8-cineole-rich chemotype [ 127 ]; and (7) myrcene-rich chemotype [ 128 ]. Turmeric flower EO from India contained p -cymen-8-ol (26.0%) and terpinolene (7.4%) [ 70 ], while the floral oil from France had terpinolene (67.4%) as the main component [ 84 ].…”

Volatiles of Curcuma manggaVal. & Zijp (Zingiberaceae) from Malaysia

“…Both samples were characterized by high relative amounts of 1 ( > 45%) and 2 ( > 10%). Except for the sample C. lg1 (oil extracted from the leaves of C. longa), with 6.3% of 2 [16], the mentioned compounds were only minor contributors to all of the other compared oils (relative amount < 1.7%). One oil sample, C. lg4 (main constituents: a-tumerone (45.3%), linalool (12; 14.9%), and b-tumerone (13.5%)), obtained from the rhizomes of C. longa from Malaysia, was separated in the Class C2 [12].…”