Identification of the Essential Oils from Annona senégalensis Pers. Sous-espèce Oulotricha Le Thomas (Annonaceae) | Chapter 07 | Advances and Trends in Biotechnology and Genetics Vol. 3
Annona senegalensis Pers., Oulotricha
Le Thomas subspecies (Annonaceae), is an evergreen shrub that is used for
ethnomedicinal purposes and as a source of food. The chemical composition of
the essential oils from leaves, stems bark, roots bark, epicarp and mesocarp of
these plant, growing in Brazzaville (Congo), were analyzed by CG and CG-MS.
These oils essentially contain sesquiterpenic compounds (58.3-97.7%), dominated
by oxygenated sesquiterpenes (21.8-88.3%), with elemol (13.2-35.0%), β-and
γ-eudesmols (3.7-58.3%) as characteristic components. The essential oils from
roots and stems bark is distinguished by its high content in diterpenes (17.1
and 11.9% of the total), while the seeds presents a significant amounts of
monoterpene hydrocarbons (25.8%) with α-pinene (6.2%) and β-phellandrene
(11.5%) as major components accompanied by two oxygenated monoterpenes :
bornyle acetate (4.5%) and smallest of 1,8-cineole. However, in the epicarp
oil, the presence of about 5.8% of oxygenated monoterpenes as terpinen-4-ol and
bornyle acetate in comparable rates (1.7%) was noted. The mesocarp oil is
exclusively rich in aliphatic fatty acids (35.8%) which is absent in the other
organs, but represented by lauric acid (18.0%), hexadecanoïc acid (8.6%),
myristic acid (7.2%) and oleic acid (2.0%). Results were compared with same species
collected in the democratic republic of Congo and in Cameroon essentially
dominated by monoterpenes (84.2 and 87.6%).
Author(s) Details
Nkounkou-Loumpangou
Célestine
Unit of Chemistry of Plant
and of the Life, Faculty of Sciences and Technology, Marien Ngouabi University,
B.P. 69, Brazzaville, Congo.
Gouollaly Tsiba1, Mahmout
Yaya
Laboratory of Chemistry of
Natural Substances, Faculty of Exact and Applied Sciences, University of
N'Djamena, BP 1117, N'Djamena, Chad.
Elouma Ndinga Arnold Murphy
Unit of Chemistry of Plant
and of the Life, Faculty of Sciences and Technology, Marien Ngouabi University,
B.P. 69, Brazzaville, Congo.
Ouamba Jean-Maurille
Unit of Chemistry of Plant
and of the Life, Faculty of Sciences and Technology, Marien Ngouabi University,
B.P. 69, Brazzaville, Congo.
Chalchat Jean Claude
Heterocycle Chemistry
Laboratory, Carbohydrate Chemistry, Essential Oil Chemistry, Blaise Pascal
University. 4, avenue des Landais, Campus des Cézeaux, 63177, Aubière, France.
Figuérédo Gilles
Laboratory of Analysis of
Plant Extracts and Flavors, Blaise Pascal University, 4, avenue des Landais,
Campus des Cézeaux, 63177, Aubière, France.
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