Molecules 2009, 14(8), 3094-3105; doi:10.3390/molecules14083094
Article

Evolution of the Yields and Composition of Essential Oil from Portuguese Myrtle (Myrtus comunis L.) through the Vegetative Cycle

1 Centre for Biological and Chemical Engineering, IBB; DEQB, IST, Av. Rovisco Pais, 1049-001 Lisboa, Portugal 2 Faculdade de Engenharias e Ciências Naturais, ULHT, Av. Campo Grande, 376, 1749-024 Lisboa, Portugal
* Author to whom correspondence should be addressed.
Received: 28 July 2009; in revised form: 13 August 2009 / Accepted: 18 August 2009 / Published: 20 August 2009
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Abstract: The chemical composition of the essential oil of Portuguese myrtle was determined at different developmental stages of the plant: pre-flowering, flowering, unripe and ripe berries. The oil was extracted separately by Clevenger distillation from leaves, branches and berries. The yields vary from 0.33% to 0.74% for leaves, 0.02% to 0.19% for branches, and 0.11% to 0.23% for berries. The highest yields were obtained for the leaves in October, and for the berries in September; branches show similar values in the months of June, July and September, and the samples collected in May and October produced very little amount of oil. Altogether, September seems to be the month with the best yields for the three parts of the plant. The essential oils were analyzed by GC and GC/MS, and a total of thirty five components were identified. The major components were limonene+1,8-cineole [25.9% (berries)–39.5% (leaves)], myrtenyl acetate [6.6% (berries)–24.8% (leaves)], α-pinene [9.7% (berries)–21.5% (leaves)], and linalool [6.2% (leaves)–36.5% (berries)]. Portuguese myrtle belongs to the group of myrtles which are characterized by the presence of myrtenyl acetate as one of the major components.
Keywords: myrtle; Myrtus communis L.; essential oil; limonene; 1; 8-cineole; myrtenyl acetate

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MDPI and ACS Style

Pereira, P.C.; Cebola, M.-J.; Bernardo-Gil, M.G. Evolution of the Yields and Composition of Essential Oil from Portuguese Myrtle (Myrtus comunis L.) through the Vegetative Cycle. Molecules 2009, 14, 3094-3105.

AMA Style

Pereira PC, Cebola M-J, Bernardo-Gil MG. Evolution of the Yields and Composition of Essential Oil from Portuguese Myrtle (Myrtus comunis L.) through the Vegetative Cycle. Molecules. 2009; 14(8):3094-3105.

Chicago/Turabian Style

Pereira, Paula C.; Cebola, Maria-João; Bernardo-Gil, M. G. 2009. "Evolution of the Yields and Composition of Essential Oil from Portuguese Myrtle (Myrtus comunis L.) through the Vegetative Cycle." Molecules 14, no. 8: 3094-3105.

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