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Chemotaxonomic value of essential oil compounds in citrus species

González, C.N. de, Sánchez, F., Quintero, A., Usubillaga, A.
Acta horticulturae 2002 no.576
Citrus limon, Citrus maxima, Citrus paradisi, Escherichia coli, Pseudomonas, Staphylococcus aureus, bioactive properties, carene, chemotaxonomy, children, essential oils, harvest date, juices, linalool, pericarp, plantations, quality control, Andes region, Venezuela
Several Citrus species are cultivated in Táchira, an Andean State of Venezuela. Fresh fruits are sold as such, or processed to produce juice, marmalade, sauce and as additive in children’s food. The purpose of this work was to determine and compare the composition of the essential oils from the pericarp of Citrus paradisi (red and white varieties), C. grandis, C. limon and C. reticulata. Fruits were collected at plantations around San Joaquín de Navay (Táchira State) at harvest time (October-December 2000). The main component of the essential oil of all species (and varieties), except Citrus grandis, was limonene. In Citrus grandis the main constituent was linalool (50.31%). Some chemical markers were detected and quantified. In Citrus paradisi (red and white) octanal (3.58% and 2.22%) as well as octyl formate (0.78% and 0.95%) were detected. Citrus grandis contained δ-3-carene (2.37%). In contrast, Citrus limon contained α-thujene (0.56%), α-terpinene (0.54%) and 1-isopropyl-2-methoxy-4-methyl-bencene(2.28%). The biological activity against Escherichia coli, Staphylococcus aureus and Pseudomonas was determined. These results are a contribution to normalise quality control criteria of the industrial essential oil production in Táchira State, Venezuela.