Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/6390
Título: Phytochemical and genetic diversity in Mentha species: assessment, valorization and conservation
Outros títulos: Diversidade genética e fitoquímica em mentas: caracterização, valorização e conservação
Autor: Rodrigues, Leandra Sofia de Matos
Orientador: Monteiro, Ana Maria da Silva
Figueiredo, Ana Cristina
Berg, Cássio Van den
Palavras-chave: Mentha cervina
Mentha pulegium
trichomes
essential oils
GC-MS
pulegone
genetic diversity
ISSRs
bioactivity
genetic conservation
Data de Defesa: 2012
Editora: ISA
Citação: Rodrigues, L.S.M. -Phytochemical and genetic diversity in Mentha species: assessment, valorization and conservation. Lisboa: ISA, 2012, 211 p.
Resumo: Mentha cervina (L.) Opiz and Mentha pulegium L. are medicinal and aromatic plants traditionally used in Portugal for aromatic and seasoning purposes and in folk medicine, for treatment of gastric and respiratory problems. Light and scanning electron microscopy of both species indumentum revealed non-glandular and glandular trichomes, corresponding to the common arrangement in Lamiaceae. Gas Chromatography and Gas Chromatography–Mass Spectrometry of both species essential oils (EOs) showed no chemical polymorphism in populations with different provenances, in cultivated or in wild growing conditions and at different developmental stages. All populations EOs belonged to the pulegone chemotype. M. cervina EOs antibacterial activity was higher than the main components alone, supporting the hypothesis of a synergistic effect of their different components. The antibacterial activity was more effective against Escherichia coli and Acinetobacter baumanni, validating their traditional use. The low levels of genetic diversity and the high structuring of M. cervina populations, assessed with Inter-simple sequence repeats markers, were assumed to result from a combination of evolutionary history and its unique biological traits, such as breeding system, clonal growth, low dispersion capacity and habitat fragmentation. The results point the necessity of conserving the maximum possible number of populations and sites for ex situ conservation.
Descrição: Doutoramento em Engenharia Agronómica - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/6390
Aparece nas colecções:BISA - Teses de Doutoramento / Doctoral Thesis

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