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Aromatic Plants of Bangladesh : Essential Oils of Leaves and Fruits of Litsea Glutinosa (lour.) C.b. Robinson

JASIM UDDIN CHOWDHURY
BCSIR Laboratories, P.O. Chittagong Cantonment, Chittagong-4220, Bangladesh

MD. NAZRUL ISLAM BHUIYAN
BCSIR Laboratories, P.O. Chittagong Cantonment, Chittagong-4220, Bangladesh

NEMAI CHANDRA NANDI
BCSIR Laboratories, P.O. Chittagong Cantonment, Chittagong-4220, Bangladesh

Abstract/ Executive Summary:

The volatile oil constituents of leaf- and fruit in Litsea glutinosa (Lour.) C.B. Robinson, identified by GC-MS analysis, was 83 and 33, respectively. The major constituents of leaf were phytol (22.42%), caryophyllene (21.48%), thujopsene (12.17%) and β-myrcene (5%); while those of the fruit oil contained lauric acid (44.84%), 3-octen-5-yne, 2,7-dimethyl (28.72%), α-cubebene (6.84%) and caryophyllene (5.04%).

Keywords: Litsea glutinosa, Essential oil, GC-MS, Phytol, Lauric acid

Location: BCSIR Laboratories compound, Chittagong

Start Date: 00-06-2007

End Date:

Program Area: Development of Host and Medicinal Plants

Non-commodity: Performance

Objectives:

To observe the essential oil from leaves and fruits of L. glutinosa

Methodology:

The essential oil from leaves and fruits of L. glutinosa were extracted by hydrodistillation method for 4 hrs from plants grown in BCSIR Laboratories compound, Chittagong during June 2007. The essential oils from leaves and fruits of L. glutinosa were analyzed by GC-MS electron impact ionization method on GC-17A gas chromatograph (Shimadzu) coupled with a GC-MS QP 5050A Mass Spectrometer (Shimadzu); using fused silica capillary column (30 m × 2.5 mm; 0.25 µm film thickness), coated with DB-1 (J&W); injector temperature 220ºC, detector temperature 250ºC, oven temperature 60 to 250ºC (3ºC/min), column temperature initially at 100^o C (2 min) to rise up to 250^o C final at the rate of 3^o C/min for 50 min; carrier gas, helium, at constant pressure of 90 Kpa. Acquisition parameters full scan; scan range 40-350 amu. The compounds were identified by comparing with the NIST (National Institute of Standards and Technology Chemistry) library data. The volatile compounds identified in the leaf and fruit oils of L. glutinosa from Bangladesh were 83 and 33, respectively of which 14 and 7 most prevalent ones. The relative content of volatile components in the total peak area of leaf and fruit were 96.85 and 99%, respectively.

Source of Information: Bangladesh J. Bot. 37(1): 81-83, 2008 (June)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Results showed that the oils were complex mixture of numerous compounds; many of which were present in trace amounts. It is worth mentioning here that there is a great variation in the chemical composition of leaf and fruit oils of L. glutinosa. Phytol is the main component in L. glutinosa leaf but totally absent in its fruit. On the other hand, fruit oil contains lauric acid but totally absent in its leaf oil. α-pinene, β-pinene, sabinene, camphene, limonene , (E)-ocimene, eugenol, nhexadecanoic acid, oleic acid were observed as the nine versatile common compounds present in both the oils with variations in their content. On the basis of above study it may be concluded that L. glutinosa, growing widely in Bangladesh, may be utilized as a source for the isolation of natural phytol and lauric acid.

Knowledge Management: Journal