Publications of PRP&SV
Characterization of essential oils of Hyptis spicigera Lam., Pluchea ovalis (Pers.) cd. and Laggera aurita (L.F.) Benth. Ex. C.B. Clarke, tropical aromatic plants
Hyptsis_spicigera
plucheaovalis
Laggera_aurita
Summary
In West Africa Region, Hyptis spicigera leaves are use as spray to keep and protect crops from various insect attack; well Pluchea ovalis and Laggera aurita are use as medicinal plants. Thus, in regard to our studies over aromatic and oils essentials plants, the while plants of Hyptis spicigera, Pluchea ovalis and Laggera aurita have been extracted by steam distilled. For all these plants, the yield of essential oil is low:
Hyptis spicigera(0.04%), Pluchea ovalis(0.02%) Laggera aurita(0.007%).
The essential oils obtained were characterised through their refraction indice and chemical composition. The analysis had been made by GC (gaz chromatography). The result of had demonstrated that the major constituents of Hyptis spicigera were: -Terpinene (38.9 %), - pinene (18.9 %), -pinene(8,9%), and p-cymene (7.5%); for Pluchea ovalis : limonene(18.9%), p-cymene(11,7%), ß-maaliene(7.4%), ß-phellandrene (7.3 %) , isocomene (6.2 %) and Laggera aurita, : 2,5-dimetoxy-p-cymene(21.2 %), ß-caryophyllene (16.58 %), -cadinene (5.9 %), -cadinol (4.2 %).
Key words : Hyptis spicigera, Pluchea ovalis, Laggera aurita, essential oil, yield, refraction indice, chemical composition.
Authors
Kabera J, Koumaglo K. H., Ntezurubanza L , Ingabire MG, Kamagaju L, Caractérisation des huiles essentielles d’Hyptis spicigera Lam., Pluchea ovalis (Pers.) DC. et Laggera aurita (L.F.) Benth. Ex. C.B. Clarke, plantes aromatiques du tropicales. In série Sciences exactes, naturelles et appliquées, Etudes rwandaises N°10 ,2005, P7-18
Références
- Hyptsis_spicigera
- plucheaovalis
- Laggera_aurita
