Lippia alba morphotypes cidreira and melissa exhibit significant differences in leaf characteristics and essential oil profile

Revista Brasileira de Farmacognosia

Caroline N. Jezler²  Ariana R. M. F. De Oliveira²  Ricardo S. Batista²  Rosilene A. Oliveira¹  Delmira Da C. Silva²  Larissa C. Do B. Costa² 

[1] ,Universidade Estadual de Santa Cruz Departamento de Ciências Biológicas ,Brazil

关键词: carvone;    citral;    essential oil composition;    leaf morphology;    limonene;    Lippia alba;   

DOI  :  10.1590/S0102-695X2013005000008

来源: SciELO

【 摘 要 】

Lippia alba (Mill.) N.E. Br. ex Britton & P. Wilson, Verbenaceae, is widely used in traditional Brazilian medicine for the treatment of abdominal distress. The species exhibits considerable chemical and morphological diversity, and various chemotypes have been characterized. A comparative study of L. alba, has been carried out of the morphoanatomical characteristics of the leaves and the profiles of the essential oils of the morphotypes cidreira and melissa grown in the Medicinal Plant Garden of the Universidade Estadual de Santa Cruz, Ilhéus, Bahia, Brazil. The mean plant height of cidreira was 1.80 m and the stems and branches were fairly erect, while melissa plants were smaller (1.60 m) and presented prostrate stems and branches. Although the leaf of the morphotypes look were similar, the mean values of length, width and area of the leaves of cidreira (respectively, 7.42 cm, 3.32 cm and 17.31 cm²) differed significantly from those of melissa (4.68 cm, 2.35 cm and 7.32 cm2). The morphotypes presented amphistomatic leaves with uniseriate epidermis on both surfaces. The mesophyll was dorsiventral, but in cidreira the palisade parenchyma was biseriate while in melissa it was uniseriate. Simple tector and capitate glandular trichomes were present on the adaxial and abaxial surfaces of the leaf blades of both morphotypes. Six distinct types of glandular trichomes could be distinguished: types I and II were present in both morphotypes, while type III was detected only in cidreira, and types IV to VI were present only in melissa. The two morphotypes also differed with respect to the composition of the essential oil, cidreira produced oil composed mainly of citral, while the oil from melissa was rich in citral, limonene and carvone.

【 授权许可】

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